| **UNITED                STATES**                      |
|-------------------------------------------------------|
| **SECURITIES                AND EXCHANGE COMMISSION** |
| **Washington,                D.C. 20549**             |
| **FORM                10-K**                          |

| (MARK                ONE)                                                            |
|--------------------------------------------------------------------------------------|
| (x)                                                                                  | Annual                Report Pursuant to Section 13 or 15(d) of the Securities Exchange                Act of                1934 (Fee Required)** **For                the fiscal year ended March 31, 2007 |
| or                                                                                   |
| (                )                                                                   | Transition                Report Pursuant to Section 13 or 15(d) of the Securities and Exchange                Act                of 1934 For                the transition period from _______ to ________ |
|  **Commission                File No. 0-12718**                                 |
|                                                                                 |
| **SUPERTEX,                INC.**                                                    |
| (Exact                name of Registrant as specified in its                charter) |

| **                                                    California**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | **94-2328535**                                                   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------|
| (State                or other jurisdiction of incorporation or organization)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | (I.R.S.                Employer Identification No.)              |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| **1235                Bordeaux Drive, Sunnyvale, California 94089**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| (Address                of principal executive offices)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Registrant's                Telephone Number, Including Area Code: **(408)                222-8888**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |                                                             |
| Securities                registered pursuant to Section 12(b) of the Act:** **                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Title                of each class: Common Stock                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           | Name                of each exchange on which registered: Nasdaq |
| Securities                registered pursuant to Section 12(g) of the Act: **None**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Indicate                by check mark if the registrant is a well-known seasoned issuer,                as                defined in Rule 405 of the Securities Act. Yes o                No                x                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Indicate                by check mark if the registrant is not required to file reports pursuant                to Section 13 of Section 15(d) of the Act. Yes o                No                x                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Indicate                by check mark whether the Registrant (1) has filed all reports required                to                be filed by Section 13 or 15(d) of the Securities Exchange Act of                1934                during the preceding 12 months (or for such shorter period that the                Registrant was required to file such reports), and (2) has been subject                to                such filing requirements for the past 90 days.** **Yes                x                No                o** **** **** **                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Indicate                by check mark if disclosure of delinquent filers pursuant to Item                405 of                Regulation S-K (Sec. 229.405 of this chapter) is not contained herein,                and                will not be contained, to the best of registrant’s knowledge, in                definitive proxy or information statements incorporated by reference                in                Part III of this Form 10-K or any amendment to this Form 10-K.                o                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Indicate                by check mark whether the registrant is an accelerated filer (as                defined                in Rule 12b-2 of the Act). Check one.Large                accelerated filer o                Accelerated filer x                Non-accelerated filer o                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| As                of September 29, 2006, the last business day of the registrant’s most                recently completed second fiscal quarter, there were 13,679,179 shares                of                the registrant’s common stock outstanding, and the aggregate market value                of such shares held by non-affiliates of the registrant was $435,238,896                based on the closing price reported on the NASDAQ National Market                on                September 29, 2006. Shares of common stock held by officers, directors                and                other persons who may be deemed “affiliates” of the Registrant have been                excluded from this computation. This determination of affiliate status                is                not necessarily a conclusive determination for other purposes. The                total                number of shares outstanding of the Registrant's common stock as                of June                11, 2007,                was 13,732,728. |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| **Documents                Incorporated by Reference:**                Part III incorporates by reference portions of the Company's definitive                proxy statement for the Annual Meeting of Shareholders to be held                on                August 17, 2007 (the "Proxy Statement").                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| *Exhibit                Index is on Page 56*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| *Total                number of pages is 62*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |

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**SUPERTEX,      INC.**

**ANNUAL      REPORT - FORM 10K**

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**PART      I**

**Item      1. Business**

*This      Annual Report on Form 10-K includes forward-looking statements. These      forward-looking statements are not historical facts, and are based on current      expectations, estimates, and projections about our industry, our beliefs, our      assumptions, and our goals and objectives. Words such as "anticipates,"      "expects," "intends," "plans," "believes," "seeks," and "estimates, " and      variations of these words and similar expressions, are intended to identify      forward-looking statements. Examples of the kinds of forward-looking statements      in this report include statements regarding the following:*
*1)      as      we increase our new product introductions, we anticipate our sales in the coming      years to increase; (2)*
* *
*we      expect medical ultrasound market to continue to grow globally in fiscal 2008      and      years beyond and we believe we will be a key player in this business; (3) we      expect to continue to step up our research and development efforts in fiscal      2008 and we project a record number of new product introductions; (4) we believe      that our activities substantially comply with present environmental regulations;      (5) we are a leader in certain markets for our product families where we have      a      technological and/or cost advantage; (6) we expect our international sales      to      continue to account for a significant portion of our total sales; (7) it is      anticipated that we will file amended tax returns for fiscal years 2004, 2005,      and 2006; (8) we believe that current orders will be shipped in fiscal 2008;      (9)      we believe that we will be able to substantially meet our production needs      from      our wafer fabrication and testing facilities in the coming fiscal year; (10)      we      expect to introduce more new integrated pulser ICs as well as ultrasound      receiver blocks; (11) custom high voltage pulsers are projected to contribute      to      our revenue growth in fiscal 2008; (12) we forecast sales to this market to      continue to grow in fiscal 2008; and (13) we expect to keep R&D      spending in fiscal year 2008 at 15% to 17% of net sales.*

**Products      and Markets**

----

|              |                                                 | **Markets,                Products and Strategies**                                                                                                                                                                   |       |                                                                                                    |
|-------------------|------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------|---------------------------------------------------------------------------------------------------------|
|  **Markets** | ** Market                Sub-Segment**          | **                   Products**                                                                                                                                                                                  | ** ** | ** Strategies**                                                                                    |
| **Imaging**       | Flat                  panel displays                 | LED                  Backlight drivers for new LCD Displays                                                                                                                                                           |       | Custom                    and proprietary                                                               |
|              | Backlighting                  keypads & displays | EL                  Drivers                                                                                                                                                                                           |       | Custom                  and proprietary,Leadership                                                      |
|              | Printers                                             | HV                  Drivers for Non-impactInk                  Jet Printers                                                                                                                                           |       | Custom                  and proprietary,Leadership                                                      |
| **Medical**       | Ultrasound                  Imaging                  | 3rd                  Gen. MUX., HV Pulsers, Beam Former, FET Drivers                                                                                                                                                  |       | Custom                  and proprietary, Leadership                                                     |
| **Telecom**       | Telecommunication                                    | HV                  Ring Generators, Optical MEMS Drivers, HV Switches, HV line protection                  devices                                                                                                   |       | Custom                  and proprietary, Leadership                                                     |
|              | Data                  communication                  | Power                  Mgmt/Supervisory, Power Sequencers                                                                                                                                                             |       | Proprietary                                                                                             |
| **Other**         | LED                  Lighting                        | RGB                  Backlighting for LCD TVs and Monitors,Drivers                  for Traffic Signals, Commercial Signages and Displays, Automotive                  Lighting,General                  Illumination |       | Small,                  reliable, efficient, and cost-effective high voltage                  solutions |
|              | Various                  Custom Products             | Proprietary                  custom HV ICs                                                                                                                                                                            |       | Custom                  and proprietary                                                                 |

|                             · | The                Imaging                Group, which                consists of three product lines, namely: |
|------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------|

| (1)   | A                family of products for driving EL panels to back-light liquid crystal                displays (LCD) in hand-held instruments, such as watches, monochrome                screens and back light keypads for cell phones, PDAs, pagers, HPCs,                MP3                players, and meters. Supertex is one of the key providers of EL drivers                for cell phones, PDAs, and watches and we have a significant share                of this                market, due in no small part to the introduction of several inductorless                EL drivers, ideally suited for use in space-constrained applications.                We                also offer custom processing services for charge-coupled devices                (CCD) and                CMOS imaging devices. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (2)   | Interface                products for driving flat panel displays. This product family is                sold to                flat panel manufacturers using electroluminescent (EL), plasma, carbon                nano-tube field emission, vacuum fluorescent, cholesteric LCD,                electrophoretic and light emitting diode (LED)                technologies. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (3)   | Driver                ICs for driving non-impact printers and plotters, primarily using                inkjet                technologies. The printer product family is used in ink-jet and                electrostatic types of printers and plotters that are mostly high-end                products with full color capability, high resolution and high-speed                output. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The                *Medical                Electronics Group,*which                consists of: |
|--------------------|-------------------------------------------------------------------------------------------------|

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| ·   | The                *Telecommunications                (Telecom)/Data Communication (Datacom) Group,*which                consists of two product lines: |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|

| (1)   | Telecom                line which includes interface products used in telephone handsets,                solid-state relays, modems, fax, ISDN, networking, PABX, and PCMCIA                cards,                as well as diagnostic, curbside, set-top and central office                equipment. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (2)   | Datacom                line which includes hotswap and sequencer controller, power management,                ring generators, high voltage protection & isolated switches, and                optical micro-electro-mechanical system or MEMS driver ICs. In addition,                we offer custom processing services for certain optical and ultrasound                MEMS products. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | *Other*.                This group includes two lines of products or                services: |
|--------------------|-----------------------------------------------------------------------------------------------|

| (1)   | A family                of high voltage driver ICs for driving light emitting diodes or LEDs                to                backlight large Liquid Crystal Display or LCD panels and a family                of                converter integrated circuits or ICs for traffic lighting, general                illumination, specialty lighting and automotive lighting. LEDs provide                a                number of advantages compared to traditional lighting and are enabling                new                applications within these markets. For example, using LEDs in traffic                lights saves energy (more efficient) and reduces maintenance costs                (longer                lifetime). Compared to cold cathode fluorescent lamps or CCFLs that                are                currently used to backlight LCD displays, LEDs provide a wider color                gamut                than existing technologies, so colors appear more vibrant and life-like,                and the contrast ratio is dramatically increased by turning off the                LEDs                during the LCD transition times in these LCD displays. In addition,                they                are more energy efficient and environmentally friendly (as they contain                no                mercury as in CCFL). LEDs in automotive brake lamps turn on quicker                than                incandescent bulbs, thereby increasing response time for other drivers                to                slow down, improving safety. LEDs are also planned for headlamps,                turn-signal lamps, dome lights, and instrumentation panel backlighting.                In                the general lighting market, LEDs are energy efficient alternatives                for                all types of lighting, including fluorescent bay lighting, HID warehouse                lighting, neon lighting, channel lettering, and architectural lighting.                We                are releasing new products targeting these emerging markets aimed                at                simplifying customers’ implementation of LEDs. We will separate the LED                driver IC family from the “Other” group in fiscal 2008 when we expect                sales to become material. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (2)   | We                also offer custom processing services for charge-coupled devices                (CCD) and                CMOS imaging services. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------|

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**Research      and Development**

**Manufacturing**

**Environmental      Laws**

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**Marketing      and Sales**

**Seasonality**

**Backlog**

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**Competition**

**Patents      and Licenses**

**Employees**

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**Executive      Officers of the Company**

| **Name**                           |   | **Position                with the Company**                       |   | **Age** |   | **Officer                Since** |
|------------------------------------|--------|--------------------------------------------------------------------|--------|---------|--------|----------------------------------|
| Henry                C. Pao        |   | President,                Chief Executive Officer                  |   | 69      |   | 1976                             |
| Benedict                C. K. Choy |   | Senior                Vice President, Technology Development       |   | 61      |   | 1976                             |
| William                P. Ingram   |   | Vice                President, Wafer Fab Operations                |   | 59      |   | 1999                             |
| Franklin                Gonzalez   |   | Vice                President, Process Technology                  |   | 56      |   | 1999                             |
| Michael                Lee         |   | Vice                President, I.C. Design                         |   | 52      |   | 1999                             |
| Dilip                Kapur         |   | Vice                President, Standard Products                   |   | 58      |   | 2000                             |
| William                Petersen    |   | Vice                President, Worldwide Sales                     |   | 54      |   | 2001                             |
| Ahmed                Masood        |   | Vice                President, Marketing                           |   | 46      |   | 2006                             |
| Michael                Tsang       |   | Vice                President, Standard Products                   |   | 48      |   | 2006                             |
| Phillip                A. Kagel    |   | Vice                President, Finance and Chief Financial Officer |   | 57      |   | 2006                             |

***Henry      C. Pao***

***Benedict      C. K. Choy***

***William      P. Ingram***

***Franklin      Gonzalez***

***Michael      Lee***

***Dilip      Kapur***

***William      Petersen***

***Ahmed      Masood***
** **

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***Michael      Tsang***

***Phillip      A. Kagel***

**Available      Information**

**Item      1A. Risk Factors**

**Factors      Which May Affect Operating Results**

| ·   | We                have focused our product offerings primarily on niche markets which                leverage our capabilities and in which we believe we have dominance                because we are a technology enabler for our customers. We attempt                to                choose markets which are sizable enough to be worth pursuing but                which are                not large enough to attract fierce competition. These markets could                grow                sufficiently to attract increased competition or else competitors                could                enter due to happenstance or downturns elsewhere. One of our emerging                markets is drivers for LED lighting and backlighting, which is expected                to                become a large market for drivers during the next few years and is                certain                to attract severe competition. In addition, our niche market might                be more                susceptible to shrinkage than more diverse markets, due to their                concentration on a few product                offerings. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                work with our customers to develop products that they will design                into                their systems. Even if we do achieve a design win, the customer’s system                may never go into production or the production may be smaller than                we had                anticipated. Although we attempt to develop products which will be                useful                for multiple customers, we may misjudge the market and develop a                product                which maybe useful for only a very few                customers. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| ·   | We                are dependent upon one fab which we own and operate. Were this fab                to                become unable to meet our needs for causes such as, obsolescence                due to                process technology changes, our ability to produce our products would                be                adversely affected. In addition, we could encounter difficulties                in                operating our fab after an earthquake or any natural disasters. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                have several competitors that are substantially larger and could                bring to                bear substantially more resources than we have in our niche markets.                We                have been able to maintain profitable margins in part because of                our                dominance in most of our niche markets. Increased competition could                cause                our margins to decrease. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our                gross margins may fluctuate depending on many factors, including                but not                limited to, our product mix, competitive pricing dynamics, product                yields,                various manufacturing costs, plant utilization, provisions for excess                and                obsolete inventory, and absorption of manufacturing                overhead. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Henry                Pao, a director of and the President and CEO of the Company, along                with                Mr. Pao’s father and brother, collectively own greater than 13% of our                outstanding stock. They have no agreement among themselves to act                together                with respect to the Company or their stockholdings. However, were                they to                act in concert, they would be our largest beneficial shareholder                and may                have an ability to elect one or more directors, to direct management,                and                to delay or prevent a change in control. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our                operations may be interrupted and our business would be harmed in                the                event of an earthquake, terrorist act, and other disasters. Our principal                executive offices, our fab facility, and major suppliers are located                in                areas that have been subject to severe earthquakes. In the event                of an                earthquake, we and/or our major suppliers may be temporarily unable                to                continue operations and may suffer significant property damage. Any                such                interruption in our ability or that of our major suppliers to continue                operations at our facilities could delay the development and shipment                of                our products. Like other U.S. companies, our business and operating                results are subject to uncertainties arising out of the economic                consequences of current and potential military actions or additional                terrorist activities and associated political instability, and the                impact                of heightened security concerns on domestic and international travel                and                commerce. Such uncertainties could also lead to delays or cancellations                of                customer orders, a general decrease in corporate spending or our                inability                to effectively market and sell our products. Any of these results                could                substantially harm our business and results of operations, causing                a                decrease in our revenues. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                sell a substantial amount of our products internationally. International                sales represents 70%, 63% and 44% of net sales, for fiscal years                2007,                2006, and 2005, respectively. We expect our international sales to                continue to account for a significant portion of our total sales.                We also                package and test most of our products abroad. Problems with foreign                economies, political turmoil, wars, epidemics, fluctuations in currency                exchange rate, increased freight costs, interruptions in air                transportation, and generally longer receivable collection period                could                disrupt our business and increase our operating                expenses. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A                significant portion of our sales are from a small number of customers                and                the loss of the one of these customers or failure to collect a receivable                from them could adversely affect our operations and financial position.                We                do not have a long-term distributorship agreement with any of our                distributors. Normal terms and conditions of sale apply, which include                a                60-day notice of cancellation and charges for work-in-process for                cancellations less than 60 days from shipment. While we have maintained                a                good relationship with our significant customers and distributors,                deterioration in that relationship could materially and adversely                affect                our business and financial results. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                are dependent upon continued innovation by our engineers. The competition                for engineers with relevant experience is extremely intense in the                Silicon                Valley, where most of our engineers are located. We must compete                in terms                of salary, benefits, and working conditions with many start-ups which                can                offer more equity. We established an IC Design Center in Hong Kong                in                fiscal 2001 where competition for qualified engineers is not as intense                as                that in Silicon Valley. However, a majority of our process technology                and                product innovation activities remains in our Sunnyvale and San Jose                offices. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                operate a fab in San Jose, California at which we use various chemicals                and solvents that are regulated by various environmental agencies.                We                cooperate and work with these agencies to comply with these regulations.                Should we nonetheless inadvertently contaminate the soil or ground                water,                or should the previous operator of the fab have done so, we may be                responsible for significant costs to remediate the situation. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| ·   | We                are dependent upon the continued service of several of our key management                and technical personnel. The loss of the services of one or more                of our                engineers, executive officers and other key personnel or our inability                to                recruit replacements for, or to attract, retain and motivate these                individuals would be harmful to our business. We do not have long-term                employment contracts with our                employees. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our                success depends upon our ability to protect our intellectual property,                including patents, trade secrets, and know-how, and to continue our                technological innovation. We cannot assure that the steps we have                taken to                protect our intellectual property will be adequate to prevent                misappropriation or that others will not develop competitive technologies                or products. The failure to obtain necessary licenses or other rights                could cause us to lose market share and harm our                business. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The                Sarbanes-Oxley Act of 2002 required us to change or supplement some                of our                corporate governance and securities disclosure and compliance practices.                The SEC and NASDAQ have revised, and continue to revise their regulations                and listing standards. These developments have increased, and may                continue                to increase, our legal compliance and financial reporting costs.                These                developments also may make it more difficult and more expensive for                us to                obtain director and officer liability insurance, and we may be required                to                accept reduced coverage or incur substantially higher costs to obtain                coverage. This, in turn, could make it more difficult for us to attract                and retain qualified members of our board of directors, or qualified                executive officers. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We                are subject to taxation by domestic and foreign taxing authorities.                Our                business is subject to the application of multiple, and sometimes,                conflicting tax laws and regulations. The application of tax laws                is                subject to legal and factual interpretation, judgment and uncertainty,                and                tax laws themselves are subject to change. Consequently, taxing                authorities from various jurisdictions may impose tax assessments                or                judgments against us that could result in a significant change to                earnings                related to prior periods, and or an increase in our effective income                tax                rate. During fiscal 2007 we increased our tax provisions related                to                Internal Revenue Service audits of fiscal 2002 and                2003. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Changes                in stock option accounting rules were adopted at the start of our                fiscal                2007 which increased our compensation expense and resulted in lower                reported operating results prepared in accordance with generally                accepted                accounting principles. The additional expenses resulting from this                pronouncement (SFAS 123R) may negatively impact our future stock                price if                we continue to utilize broad based employee stock plans to attract                and                retain employees or else, if we cease doing so, could result in a                competitive disadvantage to us in the employee marketplace. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Item      1B. Unresolved Staff Comments**

**Item      2. Properties**

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**Item      3. Legal Proceedings**

*** ***

**Item      4. Submission of Matters to a Vote of Security Holders**

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**PART      II**

**Item      5. Market for Registrant's Common Equity and Related Shareholder Matters and      Issuer Purchases of Equity Securities**

*Performance      Graph*

|                                               | 03/02   | 03/03  | 03/04   | 03/05   | 03/06   | 03/07   |
|----------------------------------------------------|---------|--------|---------|---------|---------|---------|
| Nasdaq                Stock Market (US only)       | $100.00 | $73.40 | $108.33 | $109.06 | $128.63 | $133.40 |
| Nasdaq                Electronic Components Stocks | $100.00 | $57.68 | $100.59 | $80.47  | $91.42  | $89.54  |
| Supertex,                Inc.                      | $100.00 | $64.91 | $79.02  | $85.28  | $176.86 | $153.90 |

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***Market      Information***

|                          |   | **Fiscal                Years Ended** |   |
|-------------------------------|--------|---------------------------------------|--------|
|                          |   | **31-Mar-07**                         |   | **1-Apr-06** |   |
|                          |   | **High**                              |   | **Low** |   | **High** |   | **Low** |   |
| First                Quarter  |   | $                                     | 41.77  |   | $ | 35.62 |   | $ | 18.76 |   | $ | 14.26 |   |
| Second                Quarter |   |                                  | 40.71  |   |   | 31.09 |   |   | 31.05 |   |   | 17.30 |   |
| Third                Quarter  |   |                                  | 47.82  |   |   | 37.93 |   |   | 45.81 |   |   | 28.06 |   |
| Fourth                Quarter |   |                                  | 42.42  |   |   | 32.72 |   |   | 46.37 |   |   | 29.02 |   |

***Securities      authorized for issuance under equity compensation      plans:***

*Employee      Stock Purchase Plan - *

*Stock      Option Plans -*

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| **Plan                Category**                                          |   | **Number                of Securities to be Issued upon Exercise of Outstanding Options,                Warrants,                and Rights** |      | **Weighted-Average                Exercise Price of Outstanding Options, Warrants, and                Rights** |   | **Number                of Securities Remaining Available for Future Issuance under Equity                Compensation Plans (Excluding Securities Reflected in Column                (a))** |   |
|---------------------------------------------------------------------------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------|-----------|----------------------------------------------------------------------------------------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|                                                                      |   | **(a)**                                                                                                                                       |      | **(b)**                                                                                                        |   | **(c)**                                                                                                                                                                                      |   |
| Equity                compensation plans approved by security holders     |   |                                                                                                                                          | 1,052,370 |                                                                                                           | $      | 27.11                                                                                                                                                                                        |   |   | 1,117,636(1) |   |
| Equity                compensation plans not approved by security holders |   |                                                                                                                                          | --        |                                                                                                           |   | N/A                                                                                                                                                                                          |   |   | -- |   |

*(1)      *

*Includes      232,057 shares reserved as of March 31, 2007 for future purchases by employees      through payroll deductions under the Company’s ESPP.*

***Purchases      of Equity Securities by the Issuer and Affiliated      Purchasers***

| **Period**                         |   | **Total                Number of Shares****Purchased****(1)** |       | **Average                Price****Paid                Per Share** |   | **Total                Number of Shares Purchased as Part of Publicly Announced****Plans                or Programs****(2)** |   | **Maximum                Number of Shares that May Yet be Purchased Under the****Plans                or Programs** |   |
|------------------------------------|--------|---------------------------------------------------------------|------------|-------------------------------------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------------------------------------------------------------------------------------|--------|
|                               |   |                                                          |       |                                                              |   |                                                                                                                         |   |                                                                                                                |   |
| 07/30/06                - 08/26/06 |   |                                                          | 35,000     |                                                              | $      | 31.62                                                                                                                        |   |                                                                                                                | --     |   |   | 749,100 |   |
| 12/31/06                - 01/27/07 |   |                                                          | 10,000     |                                                              |   | 37.09                                                                                                                        |   |                                                                                                                | --     |   |   | 739,100 |   |
| 01/28/07                - 02/24/07 |   |                                                          | 10,000     |                                                              |   | 37.58                                                                                                                        |   |                                                                                                                | **--** |   |   | 729,100 |   |
| **Total**                          |   |                                                          | **55,000** |                                                              | **$**  | **33.70**                                                                                                                    |   |                                                                                                                | **--** |   |   |   |   |

*(1)*

*Our      current share repurchase program, under which we repurchased these 55,000 shares      during fiscal 2007, has been in place since 1999. We are not certain but do      not      believe we publicly announced this program, although our financial statements      have reflected purchases from time to time under this program as have prior      annual reports on Form 10-K. These 55,000 shares were purchased in open market      transactions.*

*(2)*

*We      adopted a share repurchase program in 1992 authorizing the repurchase of      1,000,000 shares. Our board of directors terminated this program in 1999 after      938,000 shares had been repurchased and adopted a new share repurchase program      at the same time, authorizing the repurchase of 900,000 shares plus the 62,000      shares authorized for repurchase under the 1992 program whose repurchase had      not      been affected. As described in footnote (1), we are not certain but do not      believe that we publicly announced our 1999 repurchase plan. The 1999 repurchase      program has no expiration date other than when an aggregate of 962,000 shares      have been repurchased. Neither this program nor any other repurchase program      or      plan has expired during the fiscal year ended March 31, 2007, nor has the      Company decided to terminate any repurchase plan or program prior to its      expiration. There are no existing repurchase plans or programs under which      the      Company does not intend to make further repurchases.*

----

**Item      6. Selected Financial Data**

|                                     |   | **March                31,** |    | **April                1,** |   | **April                2,** |   | **April                3,** |    | **March                29,** |   |
|------------------------------------------|--------|------------------------------|---------|-----------------------------|--------|-----------------------------|--------|-----------------------------|---------|------------------------------|--------|
|                                     |   | **2007**                     |    | **2006**                    |   | **2005**                    |   | **2004**                    |    | **2003**                     |   |
| **Balance                Sheet Data:**   |   |                         |    |                        |   |                        |   |                        |    |                         |   |   |   |   |   |   |
| *(in                thousands)*     |   |                         |    |                        |   |                        |   |                        |    |                         |   |   |   |   |   |   |
| Total                assets              |   | $                            | 185,932 |                        | $      | 156,133                     |   | $                           | 126,377 |                         | $      | 112,797 |   | $ | 108,671 |   |
| Total                current liabilities |   | $                       | 24,680  |                        | $      | 22,709                      |   | $                           | 19,282  |                         | $      | 15,023 |   | $ | 16,146 |   |

|                                                      |   |                         |   | **                                                                           Fiscal Year Ended** |   |
|-----------------------------------------------------------|--------|------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|                                                      |   | **March                31,** |   | **April                1,**                                                                                                                                                                                                                                                                                                                                                                             |   | **April                2,** |   | **April                3,** |   | **March                29,** |   |
|                                                      |   | **2007**                     |   | **2006**                                                                                                                                                                                                                                                                                                                                                                                                |   | **2005** |   | **2004** |   | **2003** |   |
| **Statement                of Income Data:**              |   |                         |   |                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |   |   |   |   |   |   |   |   |
| *(in                thousands, except per share amounts)* |   |                         |   |                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |   |   |   |   |   |   |   |   |
| Net                sales                                  |   | $                            | 98,020 |                                                                                                                                                                                                                                                                                                                                                                                                    | $      | 80,098 |   | $ | 56,558 |   | $ | 51,394 |   | $ | 54,915 |   |
| Income                from operations(1)                  |   |                         | 27,904 |                                                                                                                                                                                                                                                                                                                                                                                                    |   | 19,532 |   |   | 7,650 |   |   | 1,126 |   |   | 2,752 |   |
| Net                income(1)                              |   | $                            | 21,427 |                                                                                                                                                                                                                                                                                                                                                                                                    | $      | 15,877 |   | $ | 6,459 |   | $ | 2,160 |   | $ | 2,855 |   |
| Net                income per share:                      |   |                         |   |                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |   |   |   |   |   |   |   |   |
| Basic(1)                                                  |   | $                            | 1.56   |                                                                                                                                                                                                                                                                                                                                                                                                    | $      | 1.19 |   | $ | 0.50 |   | $ | 0.17 |   | $ | 0.23 |   |
| Diluted(1)                                                |   | $                            | 1.53   |                                                                                                                                                                                                                                                                                                                                                                                                    | $      | 1.15 |   | $ | 0.49 |   | $ | 0.17 |   | $ | 0.22 |   |
| Shares                used in per share computation:      |
| Basic                                                     |   |                         | 13,715 |                                                                                                                                                                                                                                                                                                                                                                                                    |   | 13,313 |   |   | 12,985 |   |   | 12,758 |   |   | 12,598 |   |
| Diluted                                                   |   |                         | 14,040 |                                                                                                                                                                                                                                                                                                                                                                                                    |   | 13,770 |   |   | 13,239 |   |   | 13,051 |   |   | 12,757 |   |
|                                                      |   |                         |   |                                                                                                                                                                                                                                                                                                                                                                                                    |   |   |   |   |   |   |   |   |   |   |   |   |

----

**Item 7. Management's Discussion and Analysis of    Financial Condition and    Results of Operations**
**Overview**

|                                                    |   | **Fiscal                Year Ended** |   |
|---------------------------------------------------------|--------|--------------------------------------|--------|
|                                                    |   | **March                31, 2007**    |   | **April                1, 2006** |   | **April                2, 2005** |   |
| Net                sales                                |   |                                 | 100.0  | % |   | 100.0 | % |   | 100.0 | % |
| Cost                of sales                            |   |                                 | 40.5   |   |   | 44.3 |   |   | 48.7 |   |
| Research                and development                 |   |                                 | 14.9   |   |   | 14.4 |   |   | 17.3 |   |
| Selling,                general and administrative      |   |                                 | 16.1   |   |   | 16.9 |   |   | 20.5 |   |
| Income                from operations                   |   |                                 | 28.5   |   |   | 24.4 |   |   | 13.5 |   |
| Interest                income                          |   |                                 | 5.0    |   |   | 3.7 |   |   | 2.8 |   |
| Other                income, net                        |   |                                 | 0.7    |   |   | 0.9 |   |   | 0.6 |   |
| Income                before provision for income taxes |   |                                 | 34.2   |   |   | 29.0 |   |   | 16.9 |   |
| Provision                for income taxes               |   |                                 | 12.3   |   |   | 9.2 |   |   | 5.5 |   |
| Net                income                               |   |                                 | 21.9   | % |   | 19.8 | % |   | 11.4 | % |

**Critical      Accounting Policies and Estimates**

*Revenue      Recognition*

----

*Sales      Returns and Other Allowances*

*Allowance      for Doubtful Accounts*

*Inventory      Valuation*

----

*Accounting      for Investments*

*Impairment      of Long-Lived Assets*

*Accounting      for Income Taxes*

*Stock-Based      Compensation*

----

**Recent      Developments**

**Results      of Operations**

***Fiscal      2007 vs. Fiscal 2006***

***Net      Sales***

*(in      thousands)*

|                               |   | **Fiscal                Years Ended** |   | **                         ** |   |
|------------------------------------|--------|---------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| **Markets**                        |   | **March                31, 2007**     |   | **April                1, 2006**                                                                                                                           |   | **Year-Over-Year                Change** |   |
| Imaging                            |   | $                                     | 41,058 |                                                                                                                                                       |   | 42 | % |   |  $ | 34,366 |   |   | 43 | % |   | 19 | % |
| Medical                electronics |   |                                  | 35,647 |                                                                                                                                                       |   | 36 | % |   |   | 27,468 |   |   | 34 | % |   | 30 | % |
| Telecom                            |   |                                  | 14,892 |                                                                                                                                                       |   | 15 | % |   |   | 13,920 |   |   | 18 | % |   | 7 | % |
| Other                              |   |                                  | 6,423  |                                                                                                                                                       |   | 7 | % |   |   | 4,344 |   |   | 5 | % |   | 48 | % |
| Net                sales           |   | $                                     | 98,020 |                                                                                                                                                       |   | 100 | % |   |  $ | 80,098 |   |   | 100 | % |   | 22 | % |

----

|                                          |   | **Fiscal                Years Ended**                                  |   | **                    ** |   |
|-----------------------------------------------|--------|------------------------------------------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)*       |   | **                      March 31, 2007** |   | **                    April 1, 2006**                                                                    |   | ** Year-Over-Year                Change** |   |
| China                                         |   | $                                                                      | 32,449 |                                                                                                                         |   | 33 | % |   |  $ | 23,835 |   |   | 30 | % |   | 36 | % |
| Asia                (excl. China & Japan) |   |                                                                   | 16,209 |                                                                                                                         |   | 17 | % |   |   | 10,417 |   |   | 13 | % |   | 56 | % |
| United                States                  |   |                                                                   | 29,265 |                                                                                                                         |   | 30 | % |   |   | 29,802 |   |   | 37 | % |   | -2 | % |
| Europe                                        |   |                                                                   | 11,834 |                                                                                                                         |   | 12 | % |   |   | 6,387 |   |   | 8 | % |   | 85 | % |
| Japan                                         |   |                                                                   | 6,860  |                                                                                                                         |   | 7 | % |   |   | 7,284 |   |   | 9 | % |   | -6 | % |
| Other                                         |   |                                                                   | 1,403  |                                                                                                                         |   | 1 | % |   |   | 2,373 |   |   | 3 | % |   | -41 | % |
| Total                Net Sales                |   | $                                                                      | 98,020 |                                                                                                                         |   | 100 | % |   |  $ | 80,098 |   |   | 100 | % |   | 22 | % |

***Gross      Profit***

----

|                                                                                              |   | **Fiscal                Years Ended** |                              |
|---------------------------------------------------------------------------------------------------|--------|---------------------------------------|-----------------------------------|
| *(Dollars                in thousands)*                                                           |   |                                  | **March                31, 2007** |   |   | **April                1, 2006** |   |
| Gross                Margin Percentage                                                            |   |                                  | 60                                | % |   | 56 | % |
| *Included                in Gross Margin Percentage Above*                                        |   |                                  |                              |   |   |   |   |
| Gross                Margin Benefit from Sale of Previously Written Down                Inventory |   | $                                     | 1,645                             |   | $ | 1,136 |   |
| Percentage                of Net Sales                                                            |   |                                  | 1.7                               | % |   | 1.4 | % |

***Research      and Development***

|                                           |   | **                                                      Fiscal Years Ended****                        ** |                              |
|------------------------------------------------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------|
| *(Dollars                in thousands)*        |   |                                                                                                                                                                                                                                                                                                                                                                                                                           | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **Year-Over-Year Change** |   |
| R                & D Expenses              |   | $                                                                                                                                                                                                                                                                                                                                                                                                                              | 14,645                            |   | $ | 11,540 |   |   | 27 | % |
| * *Percentage                of Net Sales |   |                                                                                                                                                                                                                                                                                                                                                                                                                           | 15                                | % |   | 14 | % |   |   |   |

***Selling,      General and Administrative (SG&A)***

|                                    |   | **                                 Fiscal                Years Ended****                   ** |                              |
|-----------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------|
| *(Dollars                in thousands)* |   |                                                                                                                                                                                                                                                                                                                                                              | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **                   Year-Over-Year Change** |   |
| SG&A                Expenses        |   | $                                                                                                                                                                                                                                                                                                                                                                 | 15,800                            |   | $ | 13,568 |   |   | 16 | % |
| Percentage                of Net Sales  |   |                                                                                                                                                                                                                                                                                                                                                              | 16                                | % |   | 17 | % |   |   |   |

----

***Interest      Income and Other Income, Net***

|                                                 |   | **                                                     Fiscal                Years Ended****                               ** |                              |
|------------------------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------|
| *(Dollars                in thousands)*              |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **Year-Over-Year Change** |   |
| Interest                Income and Other Income, Net |   | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | 5,594                             |   | $ | 3,673 |   |   | 52 | % |
| Percentage                of Net Sales               |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | 6                                 | % |   | 5 | % |   |   |   |

***Interest      Income***

***Other      Income, Net***

***Provision      for Income***
***Taxes***

**Results      of Operations**

***Fiscal      2006 vs. Fiscal 2005***

***Net      Sales***

*(in      thousands)*

|                               |   | **                   Fiscal Years Ended** | **                             Year-Over-Year Change** |   |
|------------------------------------|--------|----------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------|--------|
| **Markets**                        |   | **April                1, 2006**                         | **                              April 2, 2005**   |
| Imaging                            |   | $                                                        | 34,366                                                                                                                  |   |   | 43 | % | $ | 16,069 |   |   | 28 | % |   | 114 | % |
| Medical                Electronics |   |                                                     | 27,468                                                                                                                  |   |   | 34 | % |   | 21,813 |   |   | 39 | % |   | 26 | % |
| Telecom                            |   |                                                     | 13,920                                                                                                                  |   |   | 18 | % |   | 12,802 |   |   | 23 | % |   | 9 | % |
| Other                              |   |                                                     | 4,344                                                                                                                   |   |   | 5 | % |   | 5,874 |   |   | 10 | % |   | -26 | % |
| Net                Sales           |   | $                                                        | 80,098                                                                                                                  |   |   | 100 | % | $ | 56,558 |   |   | 100 | % |   | 42 | % |

----

|                                          |   | **Fiscal                Years Ended**                                                                                 |                                                                                                                                                            | **                             Year-Over-Year Change** |   |
|-----------------------------------------------|--------|-----------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)*       |   | **                              April 1, 2006** | **                                     April 2, 2005** |
| China                                         |   | $                                                                                                                     | 23,835                                                                                                                                                          |                                                                                                                    |   | 30 | % |                              $ | 6,161 |   |   | 11 | % |   | 287 | % |
| Asia                (excl. China & Japan) |   |                                                                                                                  | 10,417                                                                                                                                                          |                                                                                                                    |   | 13 | % |               | 5,050 |   |   | 9 | % |   | 106 | % |
| United                States                  |   |                                                                                                                  | 29,802                                                                                                                                                          |                                                                                                                    |   | 37 | % |   | 31,796 |   |   | 56 | % |   | -6 | % |
| Europe                                        |   |                                                                                                                  | 6,387                                                                                                                                                           |                                                                                                                    |   | 8 | % |   | 5,133 |   |   | 9 | % |   | 24 | % |
| Japan                                         |   |                                                                                                                  | 7,284                                                                                                                                                           |                                                                                                                    |   | 9 | % |   | 6,673 |   |   | 12 | % |   | 9 | % |
| Other                                         |   |                                                                                                                  | 2,373                                                                                                                                                           |                                                                                                                    |   | 3 | % |   | 1,745 |   |   | 3 | % |   | 36 | % |
| Total                Net Sales                |   | $                                                                                                                     | 80,098                                                                                                                                                          |                                                                                                                    |   | 100 | % |               $ | 56,558 |   |   | 100 | % |   | 42 | % |

***Gross      Profit***

----

|                                                                                                                                                        |   | **Fiscal                Years Ended** |                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------|----------------------------------|
| *(Dollars                in thousands)*                                                                                                                     |   |                                  | **April                1, 2006** |   |   | **April                2, 2005** |   |
| Gross                Margin Percentage                                                                                                                      |   |                                  | 56                               | % |   | 51 | % |
| *Included                in Gross Margin Percentage Above*Gross                Margin Benefit from Sale of Previously Written Down                Inventory |   | $                                     | 1,136                            |   | $ | 990 |   |
| Percentage                of Net Sales                                                                                                                      |   |                                  | 1.4                              | % |   | 1.8 | % |

***Research      and Development***

|                                    |   | **                                              Fiscal Years Ended** |   | **                                   Year-Over-Year Change** |   |
|-----------------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)* |   | **April                1, 2006**                                                                                                                                                                                           |   | **April                2, 2005**                                                                                                                            |   |
| R&D Expenses                   |   | $                                                                                                                                                                                                                          | 11,540 |                                                                                                                                                        | $      | 9,780 |   |   | 18 | % |
| Percentage                of Net Sales  |   |                                                                                                                                                                                                                       | 14     | %                                                                                                                                                           |   | 17 | % |   |   |   |

***Selling,      General and Administrative (SG&A)***

|                                    |   | **                                              Fiscal Years Ended** |   | **                                   Year-Over-Year Change** |   |
|-----------------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)* |   | **April                1, 2006**                                                                                                                                                                                           |   | **April                2, 2005**                                                                                                                            |   |
| SG&A                Expenses        |   | $                                                                                                                                                                                                                          | 13,568 |                                                                                                                                                        | $      | 11,583 |   |   | 17 | % |
| Percentage                of Net Sales  |   |                                                                                                                                                                                                                       | 17     | %                                                                                                                                                           |   | 20 | % |   |   |   |

----

***Interest      Income and Other Income, Net***

|                                                 |   | **Fiscal                Years Ended** |                             | **                                  Year-Over-Year Change** |   |
|------------------------------------------------------|--------|---------------------------------------|----------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)*              |   |                                  | **April                1, 2006** |                                                                                                                                                  |   | **April                2, 2005** |   |
| Interest                Income and Other Income, Net |   | $                                     | 3,673                            |                                                                                                                                                  | $      | 1,909 |   |   | 93 | % |
| Percentage                of Net Sales               |   |                                  | 5                                | %                                                                                                                                                     |   | 3 | % |   |   |   |

***Interest      Income***

***Other      Income, Net***

***Provision      for Income***
***Taxes***

**Financial      Condition**

**Overview**

**Liquidity      and Capital Resources**

***Fiscal      2007***

|                                                     |   | **                                 Fiscal Years Ended** |                              |
|----------------------------------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------|
| *(Dollars                in thousands)*                  |   |                                                                                                                                         | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **April                2, 2005** |   |
| Net                cash provided by operating activities |   | $                                                                                                                                            | 28,151                            |   | $ | 16,838 |   | $ | 10,811 |   |
| Net                cash used in investing activities     |   |                                                                                                                                         | (36,856                           | ) |   | (35,060 | ) |   | (32,252 | ) |
| Net                cash provided by financing activities |   |                                                                                                                                         | 3,703                             |   |   | 7,242 |   |   | 2,358 |   |
| Net                decrease in cash and cash equivalents |   | $                                                                                                                                            | (5,002                            | ) | $ | (10,980 | ) | $ | (19,083 | ) |

**Operating      Activities**

----

**Investing      Activities**

**Financing      Activities**

***Fiscal      2006***

*,*
* *

----

**Off-Balance      Sheet Arrangements**

**Contractual      Obligations**

*(in      thousands):*

|                                              |   | **Payment                Due by Year** |       |
|---------------------------------------------------|--------|----------------------------------------|------------|
| **Contractual                Obligations**        |   |                                   | **Total**  |   |   | **Less                than 1 Year** |   |   | **2-3                Years** |   |   | **4-5                Years** |   |   | **After                5 Years** |   |
| Operating                lease obligations (1)    |   | $                                      | 4,588      |   | $ | 1,017 |   | $ | 2,530 |   | $ | 1,041 |   | $ | -- |   |
| Purchase                obligations (2)           |   |                                   | 8,922      |   |   | 8,906 |   |   | 16 |   |   | -- |   |   | -- |   |
| Total                Contractual Cash Obligations |   | **$**                                  | **13,510** |   | **$** | **9,923** |   | **$** | **2,546** |   | **$** | **1,041** |   | **$** | **--** |   |

*(1)      We lease facilities under non-cancelable lease agreements expiring at various      times through April 2011. Rental expense, net of sublease for fiscal 2007      amounted to $962,000.*

*(2)      To obtain favorable pricing and resource commitment, we commit to volume      purchase to suppliers of our manufacturing materials.*

**Common      Stock Repurchases**

|                                        |   | **Fiscal                Years Ended** |      |
|---------------------------------------------|--------|---------------------------------------|-----------|
|                                        |   | **March                31, 2007**     |      | **April                1, 2006** |   |
| Number                of shares repurchased |   |                                  | 55,000    |   |   | 67,900 |   |
| Cost                of shares repurchased   |   | $                                     | 1,853,000 |   | $ | 1,080,000 |   |
| Average                price per share      |   | $                                     | 33.70     |   | $ | 15.91 |   |

**Recent      Accounting Pronouncements**

*The      Fair Value Option for Financial Assets and Financial      Liabilities*

*Considering      the Effects of Prior Year Misstatements when Quantifying Current Year      Misstatements.*

----

*Fair      Value Measurements, *

*Accounting      for Uncertainty in Income Taxes: An Interpretation of FASB Statement No.      109*
*Accounting      for Income Taxes*

**Item      7A. Quantitative and Qualitative Disclosures About Market      Risk**

**Interest      Rate Risk**

|                                          |   |   |                              |   |   | **Weighted                Average Interest Rate for the Fiscal Year Ended** |   |
|-----------------------------------------------|--------|--------|-----------------------------------|--------|--------|-----------------------------------------------------------------------------|--------|
| *(Dollars                in thousands)*       |   |   | **March                31, 2007** |   |   | **April                1, 2006**                                            |   |   | **March                31, 2007** |   |   | **April                1, 2006** |   |
| Available-for-sale                securities: |   |   |                              |   |   |                                                                        |   |   |   |   |   |   |   |
| Tax-exempt                securities          |   | $      | 109,550                           |   | $      | 76,200                                                                      |   |   | 3.9 | % |   | 3.5 | % |
|                                          |   |   |                              |   |   |                                                                        |   |   |   |   |   |   |   |

**Foreign      Currency Exchange Risks**

----

**Item      8. Financial Statements and Supplementary Data**

*(in      thousands, except per share amounts):*

|                                                    |   | **Quarters                Ended** |   |
|---------------------------------------------------------|--------|-----------------------------------|--------|
|                                                    |   | **Mar                31,**        |   | **Dec                30,** |   | **Sep                30,** |   | **July                1,** |   | **Apr                1,** |   | **Dec                31,** |   | **Oct                1,** |   | **Jul                2,** |   |
|                                                    |   | **2007**                          |   | **2006** |   | **2006** |   | **2006** |   | **2006** |   | **2005** |   | **2005** |   | **2005** |   |
| *(Unaudited)*                                           |   |                              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Statement                of Income Data:**            |   |                              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net                sales                                |   | $                                 | 22,836 |   | $ | 24,098 |   | $ | 26,521 |   | $ | 24,565 |   | $ | 23,964 |   | $ | 19,915 |   | $ | 20,226 |   | $ | 15,993 |   |
| Costs                of sales                           |   |                              | 9,669  |   |   | 9,860 |   |   | 10,305 |   |   | 9,837 |   |   | 10,647 |   |   | 9,161 |   |   | 8,844 |   |   | 6,806 |   |
| Gross                profit (margin)                    |   |                              | 13,167 |   |   | 14,238 |   |   | 16,216 |   |   | 14,728 |   |   | 13,317 |   |   | 10,754 |   |   | 11,382 |   |   | 9,187 |   |
| Income                from operations                   |   |                              | 5,798  |   |   | 6,398 |   |   | 8,732 |   |   | 6,976 |   |   | 6,258 |   |   | 4,498 |   |   | 5,536 |   |   | 3,240 |   |
| Income                before provision for income taxes |   |                              | 7,486  |   |   | 8,048 |   |   | 9,700 |   |   | 8,264 |   |   | 7,424 |   |   | 5,397 |   |   | 6,238 |   |   | 4,146 |   |
| Net                income                               |   | $                                 | 5,022  |   | $ | 5,493 |   | $ | 5,996 |   | $ | 4,916 |   | $ | 5,122 |   | $ | 3,689 |   | $ | 4,247 |   | $ | 2,819 |   |
| Net                income per share                     |   |                              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Basic                                                   |   | $                                 | 0.36   |   | $ | 0.40 |   | $ | 0.44 |   | $ | 0.36 |   | $ | 0.38 |   | $ | 0.27 |   | $ | 0.32 |   | $ | 0.22 |   |
| Diluted                                                 |   | $                                 | 0.36   |   | $ | 0.39 |   | $ | 0.43 |   | $ | 0.35 |   | $ | 0.37 |   | $ | 0.26 |   | $ | 0.31 |   | $ | 0.21 |   |

**Item      9. Changes in and Disagreements with Accountants on Accounting and Financial      Disclosure**

**Item      9A. Controls and Procedures**

*Evaluation      of Disclosure Controls and Procedures*

*Disclosure      Controls and Procedures*
*.      *

*Limitations      on the Effectiveness of Disclosure Controls*
*.      *

*Evaluation      of Disclosure Controls and Procedures. *

*Management’s      Annual Report on Internal Control Over Financial Reporting: *

*Internal      Control-Integrated Framework. *

----

*Attestation      Report of the Registered Public Accounting Firm.*

*Changes      in Internal Control over Financial Reporting. *

* *

**Item      9B. Other Information.**

**PART      III**

**Item      10. Directors, Executive Officers and Corporate Governance**

**Item      11. Executive Compensation**

----

**Item      12. Security Ownership of Certain Beneficial Owners and Management and Related      Stockholder Matters**

**Item      13. Certain Relationships and Related Transactions, and Director Independence      **

**Item      14. Principal Accountant Fees and Services**

**PART      IV**

**Item      15. Exhibits and Financial Statement Schedules**

| 10                                  | Deferred                Compensation Plan (Supplemental Employee Retirement Plan), which                became                effective January 1, 1996. |
|------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 21.1                               | Subsidiary                of the Registrant. |
|--------------------------------------------------------------------------------------------------------------------|----------------------------------------------|

| 31.1                               | Certification                of Chief Executive Officer pursuant to Securities Exchange Act Rules                13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the                Sarbanes-Oxley Act of 2002. |
|--------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 31.2                               | Certification                of Chief Financial Officer pursuant to Securities Exchange Act Rules                13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the                Sarbanes-Oxley Act of 2002. |
|--------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 32.1                               | Certification                of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as                adopted                pursuant to Section 906 of the Sarbanes-Oxley Act of                2002. |
|--------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 32.2                               | Certification                of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as                adopted                pursuant to Section 906 of the Sarbanes-Oxley Act of                2002. |
|--------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

**SIGNATURES**

**                                        SUPERTEX, INC.**

**POWER      OF ATTORNEY**

**Signature**
**Title**
**Date**

----

**Report      of Independent Registered Public Accounting Firm**

*Consolidated      financial statements*

*Internal      control over financial reporting*

*Management’s      Annual Report on Internal Control over Financial Reporting*
*Internal      Control - Integrated Framework*
*Internal      Control - Integrated Framework*

----

**SUPERTEX,      INC.**

**CONSOLIDATED      BALANCE SHEETS**

*(in      thousands)*

|                                                                                                                                                                                          |   | **March                31, 2007** |    | **April                1, 2006** |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------|---------|----------------------------------|--------|
| ASSETS                                                                                                                                                                                        |   |                              |    |                             |   |   |   |
| Current                Assets:                                                                                                                                                                |   |                              |    |                             |   |   |   |
| Cash                and cash equivalents                                                                                                                                                      |   | $                                 | 22,652  |                             | $      | 27,654 |   |
| Short-term                investments                                                                                                                                                         |   |                              | 116,264 |                             |   | 82,992 |   |
| Trade                accounts receivable                                                                                                                                                      |   |                              | 12,793  |                             |   | 14,824 |   |
| Inventories                                                                                                                                                                                   |   |                              | 14,238  |                             |   | 12,543 |   |
| Prepaid                expenses and other current assets                                                                                                                                      |   |                              | 2,172   |                             |   | 1,358 |   |
| Deferred                income taxes                                                                                                                                                          |   |                              | 8,123   |                             |   | 7,781 |   |
| Total                current assets                                                                                                                                                           |   |                              | 176,242 |                             |   | 147,152 |   |
| Property,                plant and equipment, net                                                                                                                                             |   |                              | 8,651   |                             |   | 8,048 |   |
| Other                assets                                                                                                                                                                   |   |                              | 140     |                             |   | 141 |   |
| Deferred                income taxes                                                                                                                                                          |   |                              | 899     |                             |   | 792 |   |
| Total                assets                                                                                                                                                                   |   | $                                 | 185,932 |                             | $      | 156,133 |   |
|                                                                                                                                                                                          |   |                              |    |                             |   |   |   |
|                                                                                                                                                                                          |   |                              |    |                             |   |   |   |
| LIABILITIES                AND SHAREHOLDERS’ EQUITY                                                                                                                                     |   |                              |    |                             |   |   |   |
| Current                Liabilities:                                                                                                                                                           |   |                              |    |                             |   |   |   |
| Trade                accounts payable                                                                                                                                                         |   | $                                 | 4,120   |                             | $      | 3,725 |   |
| Accrued                salaries and employee benefits                                                                                                                                         |   |                              | 12,102  |                             |   | 11,227 |   |
| Other                accrued liabilities                                                                                                                                                      |   |                              | 2,175   |                             |   | 1,498 |   |
| Deferred                revenue                                                                                                                                                               |   |                              | 2,965   |                             |   | 3,566 |   |
| Income                taxes payable                                                                                                                                                           |   |                              | 3,318   |                             |   | 2,693 |   |
| Total                current liabilities                                                                                                                                                      |   |                              | 24,680  |                             |   | 22,709 |   |
|                                                                                                                                                                                          |   |                              |    |                             |   |   |   |
| Commitments                and contingencies (Note 14)                                                                                                                                        |   |                              |    |                             |   |   |   |
|                                                                                                                                                                                          |   |                              |    |                             |   |   |   |
| Shareholders’                equity:                                                                                                                                                    |   |                              |    |                             |   |   |   |
| Preferred                stock, no par value -- *10,000                shares authorized, none outstanding*                                                                                   |   |                              | --      |                             |   | -- |   |
| Common                stock, no par value -- *30,000                shares authorized; issued and outstanding**13,794                shares (2**007)                and 13,608 shares (2006)* |   |                              | 54,741  |                             |   | 46,692 |   |
| Retained                earnings                                                                                                                                                              |   |                              | 106,511 |                             |   | 86,732 |   |
| Total                shareholders' equity                                                                                                                                                     |   |                              | 161,252 |                             |   | 133,424 |   |
| Total                liabilities and shareholders’ equity                                                                                                                               |   | $                                 | 185,932 |                             | $      | 156,133 |   |

*Notes      to Consolidated Financial Statements*
**.**

----

**SUPERTEX,      INC.**

**CONSOLIDATED      STATEMENTS OF INCOME **

*(in      thousands, except per share amounts)*

**                                                                                                                                                       Fiscal Years Ended**

|                                                                                                                                                                                                                              |   |  March                31, 2007  |                                                                                                                                                                                                                                                                                  |  April                1, 2006 |   |  April                2, 2005                                                                                                                                                                                                                                                    |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
|  Net              Sales                                                                                                                                                                                                      |   |                                           | $                                                       98,020                     |                               |        | $                                                                  80,098               |   |   | $                                           56,558 |   |
|  Cost              and expenses:                                                                                                                                                                                             |   |                                      |                                                                                                                                                                                                                                                                                  |                               |   |                                                                                                                                                                                                                                                                                  |   |   |   |   |
|              Cost                of sales                                                                                                                        |   |                                      | 39,671                                                                                                                                                                                                                                                                           |                               |   | 35,458                                                                                                                                                                                                                                                                           |   |   | 27,545  |   |
|                                Research and development                                                                                      |   |                                      | 14,645                                                                                                                                                                                                                                                                           |                               |   | 11,540                                                                                                                                                                                                                                                                           |   |   |  9,780 |   |
|                                Selling, general and administrative                                                                           |   |                                      | 15,800                                                                                                                                                                                                                                                                           |                               |   | 13,568                                                                                                                                                                                                                                                                                |   |   | 11,583 |   |
|                                            Total              costs and expenses |   |                                      | 70,116                                                                                                                                                                                                                                                                           |                               |   | 60,566                                                                                                                                                                                                                                                                           |   |   | 48,908  |   |
|  Income              from operations                                                                                                                                                                                         |   |                                      | 27,904                                                                                                                                                                                                                                                                           |                               |   | 19,532                                                                                                                                                                                                                                                                           |   |   | 7,650  |   |
|                                Interest income                                                                                               |   |                                      | 4,887                                                                                                                                                                                                                                                                            |                               |   | 2,959                                                                                                                                                                                                                                                                            |   |   | 1,603  |   |
|                                Other income, net                                                                                             |   |                                      | 707                                                                                                                                                                                                                                                                              |                               |   | 714                                                                                                                                                                                                                                                                              |   |   | 306  |   |
|  Income              before provision for income taxes                                                                                                                                                                       |   |                                      | 33,498                                                                                                                                                                                                                                                                           |                               |   | 23,205                                                                                                                                                                                                                                                                           |   |   | 9,559  |   |
|  Provision              for income taxes                                                                                                                                                                                     |   |                                      | 12,071                                                                                                                                                                                                                                                                           |                               |   | 7,328                                                                                                                                                                                                                                                                            |   |   | 3,100  |   |
|                                  Net income                                                                                        |   |                                      | $                                                    21,427                             |                               |   | $                                       15,877                                |   |   |                             $                            6,459  |   |
|                                                                                                                                                                                                                              |   |                                      |                                                                                                                                                                                                                                                                                  |                               |   |                                                                                                                                                                                                                                                                                  |   |   |   |   |
|  Net              income per share                                                                                                                                                                                           |   |                                      |                                                                                                                                                                                                                                                                                  |                               |   |                                                                                                                                                                                                                                                                                  |   |   |   |   |
|                              Basic                                                                                                                     |   |                                      | $                                                        1.56  |                               |   | $                                                        1.19  |   |   |                       $                                            0.50  |   |
|                              Diluted                                                                                                                   |   |                                      | $                                                        1.53  |                               |   | $                                                        1.15  |   |   | $                                           0.49  |   |
|  Shares              used in per share computation                                                                                                                                                                           |   |                                      |                                                                                                                                                                                                                                                                                  |                               |   |                                                                                                                                                                                                                                                                                  |   |   |   |   |
|                              Basic                                                                                                                     |   |                                      | 13,715                                                                                                                                                                                                                                                                           |                               |   | 13,313                                                                                                                                                                                                                                                                           |   |   | 12,985  |   |
|                              Diluted                                                                                                                   |   |                                      | 14,040                                                                                                                                                                                                                                                                           |                               |   |  13,770                                                                                                                                                                                                                                                                          |   |   | 13,239  |   |

*Notes      to Consolidated Financial Statements.*

----

**SUPERTEX,      INC.**

**CONSOLIDATED      STATEMENTS OF SHAREHOLDERS' EQUITY **

*(in      thousands*
***)***

|                                                                   |   | **Number                of Common Shares** |   | **Stock                Amount** |   | **Retained                Earnings** |   | **Shareholders’                Equity** |    |
|------------------------------------------------------------------------|--------|--------------------------------------------|--------|---------------------------------|--------|--------------------------------------|--------|-----------------------------------------------|---------|
|                                                                   |   |                                       |   |                            |   |                                 |   |                                          |    |
| Balance,                April 3, 2004                                  |   |                                       | 12,889 |                            | $      | 32,134                               |   | $                                             | 65,640  |   | $ | 97,774 |   |
| Stock                options exercised                                 |   |                                       | 183    |                            |   | 2,330                                |   |                                          | --      |   |   | 2,330 |   |
| Shares                received in lieu of cash for exercise of options |   |                                       | (8     | )                               |   | (181                                 | )      |                                          | --      |   |   | (181 | ) |
| Issuance                of shares under ESPP                           |   |                                       | 48     |                            |   | 623                                  |   |                                          | --      |   |   | 623 |   |
| Stock                repurchased                                       |   |                                       | (26    | )                               |   | (67                                  | )      |                                          | (347    | ) |   | (414 | ) |
| Tax                benefit from stock options                          |   |                                       | --     |                            |   | 504                                  |   |                                          | --      |   |   | 504 |   |
| Net                income                                              |   |                                       | --     |                            |   | --                                   |   |                                          | 6,459   |   |   | -- |   |
| Total                comprehensive income                              |   |                                       | --     |                            |   | --                                   |   |                                          | --      |   |   | 6,459 |   |
| Balance,                April 2, 2005                                  |   |                                       | 13,086 |                            |   | 35,343                               |   |                                          | 71,752  |   |   | 107,095 |   |
| Stock                options exercised                                 |   |                                       | 553    |                            |   | 8,289                                |   |                                          | --      |   |   | 8,289 |   |
| Shares                received in lieu of cash for exercise of options |   |                                       | (21    | )                               |   | (666                                 | )      |                                          | --      |   |   | (666 | ) |
| Issuance                of shares under ESPP                           |   |                                       | 58     |                            |   | 699                                  |   |                                          | --      |   |   | 699 |   |
| Stock                repurchased                                       |   |                                       | (68    | )                               |   | (183                                 | )      |                                          | (897    | ) |   | (1,080 | ) |
| Tax                benefit from stock options                          |   |                                       | --     |                            |   | 3,210                                |   |                                          | --      |   |   | 3,210 |   |
| Net                income                                              |   |                                       | --     |                            |   | --                                   |   |                                          | 15,877  |   |   | -- |   |
| Total                comprehensive income                              |   |                                       | --     |                            |   | --                                   |   |                                          | --      |   |   | 15,877 |   |
| Balance,                April 1, 2006                                  |   |                                       | 13,608 |                            |   | 46,692                               |   |                                          | 86,732  |   |   | 133,424 |   |
| Stock                options exercised                                 |   |                                       | 229    |                            |   | 4,278                                |   |                                          | --      |   |   | 4,278 |   |
| Shares                received in lieu of cash for exercise of options |   |                                       | (8     | )                               |   | (387                                 | )      |                                          | --      |   |   | (387 | ) |
| Issuance                of shares under ESPP                           |   |                                       | 20     |                            |   | 657                                  |   |                                          | --      |   |   | 657 |   |
| Stock                repurchased                                       |   |                                       | (55    | )                               |   | (205                                 | )      |                                          | (1,648  | ) |   | (1,853 | ) |
| Stock-based                compensation expense                        |   |                                       | --     |                            |   | 2,428                                |   |                                          | --      |   |   | 2,428 |   |
| Tax                benefit from stock options                          |   |                                       | --     |                            |   | 1,278                                |   |                                          | --      |   |   | 1,278 |   |
| Net                income                                              |   |                                       | --     |                            |   | --                                   |   |                                          | 21,427  |   |   | -- |   |
| Total                comprehensive income                              |   |                                       | --     |                            |   | --                                   |   |                                          | --      |   |   | 21,427 |   |
| Balance,                March 31, 2007                                 |   |                                       | 13,794 |                            | $      | 54,741                               |   | $                                             | 106,511 |   | $ | 161,252 |   |

*Notes      to Consolidated Financial Statements*

----

**SUPERTEX,      INC.**

**CONSOLIDATED      STATEMENTS OF CASH FLOWS**

*(in      thousands)*

|                                                                                                   |   | ** ****Fiscal                Years Ended** |        |
|--------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------|-------------|
| CASH                FLOWS FROM OPERATING ACTIVITIES                                                    |   | **March                31, 2007**               |        | **April                1, 2006** |   | **April                2, 2005** |   |
|                                                                                                   |   |                                            |        |   |   |   |   |
| Net                income                                                                              |   | $                                               | 21,427      |   | $ | 15,877 |   | $ | 6,459 |   |
| Non-cash                adjustments to net income:                                                     |   |                                            |        |   |   |   |   |   |   |   |
| Depreciation                and amortization                                                           |   |                                            | 2,904       |   |   | 2,854 |   |   | 3,341 |   |
| Provision                for doubtful accounts and sales returns                                       |   |                                            | 854         |   |   | 1,035 |   |   | 1,335 |   |
| Provision                for excess and obsolete inventories                                           |   |                                            | 2,454       |   |   | 2,293 |   |   | 1,777 |   |
| Deferred                income taxes                                                                   |   |                                            | (449        | ) |   | (140 | ) |   | (2,500 | ) |
| Stock-based                compensation                                                                |   |                                            | 2,428       |   |   | -- |   |   | -- |   |
| Tax                benefit related to stock-based compensation plans                                   |   |                                            | 1,278       |   |   | 3,210 |   |   | 504 |   |
| Excess                tax benefit related to stock-based compensation                                  |   |                                            | (1,008      | ) |   | -- |   |   | -- |   |
| Changes                in operating assets and liabilities:                                            |   |                                            |        |   |   |   |   |   |   |   |
| Short-term                investments, categorized as trading                                          |   |                                            | 78          |   |   | (1,059 | ) |   | (726 | ) |
| Trade                accounts receivable                                                               |   |                                            | 1,177  |   |   | (7,961 | ) |   | (1,566 | ) |
| Inventories                                                                                            |   |                                            | (4,149      | ) |   | (2,212 | ) |   | (1,795 | ) |
| Prepaid                expenses and other assets                                                       |   |                                            | (814        | ) |   | (486 | ) |   | (277 | ) |
| Trade                accounts payable and accrued expenses                                             |   |                                            | 1,947       |   |   | 3,816 |   |   | 2,350 |   |
| Deferred                revenue                                                                        |   |                                            | (601        | ) |   | (44 | ) |   | 356 |   |
| Income                taxes payable                                                                    |   |                                            | 625         |   |   | (345 | ) |   | 1,553 |   |
| Net                cash provided by operating activities                                               |   |                                            | 28,151      |   |   | 16,838 |   |   | 10,811 |   |
|  CASH                FLOWS FROM INVESTING ACTIVITIES                                              |   |                                            |        |   |   |   |   |   |   |   |
| Purchases                of property, plant and equipment, net                                         |   |                                            | (3,507      | ) |   | (2,910 | ) |   | (1,602 | ) |
| Sales                of short-term investments, categorized as                available-for-sale       |   |                                            | 992,920     |   |   | 760,474 |   |   | 396,258 |   |
| Purchases                of short-term investments, categorized as                available-for-sale   |   |                                            | (1,026,269  | ) |   | (792,624 | ) |   | (426,908 | ) |
| Net                cash used in investing activities                                                   |   |                                            | (36,856     | ) |   | (35,060 | ) |   | (32,252 | ) |
|  CASH                FLOWS FROM FINANCING ACTIVITIES                                              |   |                                            |        |   |   |   |   |   |   |   |
| Proceeds                from exercise of stock options and employee stock purchase                plan |   |                                            | 4,548       |   |   | 8,322 |   |   | 2,772 |   |
| Stock                repurchased                                                                       |   |                                            | (1,853      | ) |   | (1,080 | ) |   | (414 | ) |
| Excess                tax benefit related to stock-based compensation                                  |   |                                            | 1,008       |   |   | -- |   |   | -- |   |
| Net                cash provided by financing activities                                               |   |                                            | 3,703       |   |   | 7,242 |   |   | 2,358 |   |
| NET                DECREASE IN CASH AND CASH EQUIVALENTS                                               |   |                                            | (5,002      | ) |   | (10,980 | ) |   | (19,083 | ) |
|                                                                                                   |   |                                            |        |   |   |   |   |   |   |   |
| CASH                AND CASH EQUIVALENTS:                                                              |   |                                            |        |   |   |   |   |   |   |   |
| Beginning                of period                                                                     |   |                                            | 27,654      |   |   | 38,634 |   |   | 57,717 |   |
| End                of period                                                                           |   | $                                               | 22,652      |   | $ | 27,654 |   | $ | 38,634 |   |
|                                                                                                   |   |                                            |        |   |   |   |   |   |   |   |
| Supplemental                cash flow disclosures:                                                     |   |                                            |        |   |   |   |   |   |   |   |
| Income                taxes paid, net of refunds                                                       |   | $                                               | 10,866      |   | $ | 4,866 |   | $ | 3,543 |   |

*Notes to Consolidated Financial Statements*
*.*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS **

*Nature      of Business*

*Principles      of Consolidation*

*Fiscal      Period*

*Use      of Estimates*

*Certain      Risks and Uncertainties*

*Cash      and Cash Equivalents*

*Short-term      Investments*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*“Accounting      for Certain Investments in Debt and Equity Securities.”*

*“Working      Capital-Current Assets and Current Liabilities,”*

*Accounts      Receivable*

*Concentration      of credit risk and foreign operations*

*Foreign      Currency Risk*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*Foreign      Currency Translation*

*Inventories*

*Property,      Plant and Equipment*

*Impairment      of Long-lived assets*

*Revenue      Recognition*

** **

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*Research      and Development Expense*

*Net      Income per Share*

*Stock-based      Compensation*

*,      “Accounting for Stock-Based Compensation - Transition and      Disclosures”.*

*Income      Taxes*

*“Accounting      for Income Taxes,”*

** **
*Advertising      Costs*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*Fair      Value of Financial Instrument*

*Comprehensive      Income*

*Recent      Accounting Pronouncements*

*The        Fair Value Option for Financial Assets and Financial        Liabilities*

*Considering        the Effects of Prior Year Misstatements when Quantifying Current Year        Misstatements.*

*Fair          Value Measurements, *

*Accounting          for Uncertainty in Income Taxes: An Interpretation of FASB Statement No.          109*
*Accounting          for Income Taxes*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*(in        thousands):*

|                                          |   | **March                31, 2007** |    | **April                1, 2006** |   |
|-----------------------------------------------|--------|-----------------------------------|---------|----------------------------------|--------|
| Available-for-sale                securities: |   |                              |    |                             |   |   |   |
| Due                after ten years            |   | $                                 | 109,550 |                             | $      | 76,200 |   |
|                                          |   |                              |         |                             |   |   |   |
| Trading                securities:            |   |                              |         |                             |   |   |   |
| Due                in one year or less        |   |                              | 6,714   |                             |   | 6,792 |   |
|                                          |   | $                                 | 116,264 |                             | $      | 82,992 |   |

|                                                        |   | **March                31, 2007** |    | **April                1, 2006** |   |
|-------------------------------------------------------------|--------|-----------------------------------|---------|----------------------------------|--------|
| State                and municipal agencies notes and bonds |   | $                                 | 23,000  |                             | $      | 10,000 |   |
| Corporate                notes and bonds                    |   |                              | 86,550  |                             |   | 66,200 |   |
|                                                        |   | $                                 | 109,550 |                             | $      | 76,200 |   |

*(in      thousands):*

|                                                                   |   | **March                31, 2007** |   | **April                1, 2006** |   |
|------------------------------------------------------------------------|--------|-----------------------------------|--------|----------------------------------|--------|
| Accounts                receivable                                     |   | $                                 | 13,582 |                             | $      | 15,496 |   |
| Less:                Allowance for doubtful accounts and sales returns |   |                              | (789   | )                                |   | (672 | ) |
| Total                Trade accounts receivable                         |   | $                                 | 12,793 |                             | $      | 14,824 |   |

|                                               |   | **March                31, 2007** |   | **April                1, 2006** |   | **April                3, 2005** |   |
|----------------------------------------------------|--------|-----------------------------------|--------|----------------------------------|--------|----------------------------------|--------|
| Balance                at beginning of fiscal year |   | $                                 | 672    |                             | $      | 704                              |   | $ | 386 |   |
| Charged                to costs and expenses       |   |                              | 854    |                             |   | 1,035                            |   |   | 1335 |   |
| Write-off                of accounts               |   |                              | (737   | )                                |   | (1,067                           | )      |   | (1,017 | ) |
| Balance                at end of fiscal year       |   | $                                 | 789    |                             | $      | 672                              |   | $ | 704 |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

** **

*(in      thousands):*

|                             |   | **March                31, 2007** |   | **April                1, 2006** |   |
|----------------------------------|--------|-----------------------------------|--------|----------------------------------|--------|
| Raw                materials     |   | $                                 | 1,648  |                             | $      | 1,214 |   |
| Work-in-process                  |   |                              | 8,382  |                             |   | 7,644 |   |
| Finished                goods    |   |                              | 4,208  |                             |   | 3,685 |   |
| Total                Inventories |   | $                                 | 14,238 |                             | $      | 12,543 |   |

*(in      thousands):*

|                                                          |   | **March                31, 2007** |    | **April                1, 2006** |   |
|---------------------------------------------------------------|--------|-----------------------------------|---------|----------------------------------|--------|
| Land                                                          |   | $                                 | 825     |                             | $      | 825 |   |
| Machinery                and equipment                        |   |                              | 39,113  |                             |   | 36,290 |   |
| Leasehold                improvements                         |   |                              | 2,566   |                             |   | 2,429 |   |
| Building                                                      |   |                              | 2,504   |                             |   | 2,504 |   |
| Furniture                and fixtures                         |   |                              | 364     |                             |   | 333 |   |
|                                                          |   |                              | 45,372  |                             |   | 42,381 |   |
| Less                accumulated depreciation and amortization |   |                              | (36,721 | )                                |   | (34,333 | ) |
| Property,                plant and equipment, net             |   | $                                 | 8,651   |                             | $      | 8,048 |   |

*(in thousands)*

|                                     |   | **March                31, 2007** |   | **April                1, 2006** |   |
|------------------------------------------|--------|-----------------------------------|--------|----------------------------------|--------|
| Shipments                to distributors |   | $                                 | 2,965  |                             | $      | 3,454 |   |
| Technology                license        |   |                              | --     |                             |   | 112 |   |
| Total                Deferred revenue    |   | $                                 | 2,965  |                             | $      | 3,566 |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*(in      thousands)*

| **Description**                                   |   |   | **Balance                at Beginning of Year** |   |   | **Charged                (Credited to Income** | **)**  |   | **Deductions                and Other** |   |   | **Balance                at End of Year** |   |
|---------------------------------------------------|--------|--------|-------------------------------------------------|--------|--------|------------------------------------------------|--------|--------|-----------------------------------------|--------|--------|-------------------------------------------|--------|
| Twelve                months ended March 31, 2007 |   |   |                                            |   |   |                                           |   |   |                                    |   |   |                                      |   |
| Allowance                for sales returns        |   | $      | 525                                             |   | $      | 646                                            |   | $      | (972                                    | )      | $      | 199                                       |   |
|                                              |   |   |                                            |   |   |                                           |   |   |                                    |   |   |                                      |   |
| Twelve                months ended April 1, 2006  |   |   |                                            |   |   |                                           |   |   |                                    |   |   |                                      |   |
| Allowance                for sales returns        |   | $      | 463                                             |   | $      | 1,128                                          |   | $      | (1,066                                  | )      | $      | 525                                       |   |
|                                              |   |   |                                            |   |   |                                           |   |   |                                    |   |   |                                      |   |
| Twelve                months ended April 2, 2005  |   |   |                                            |   |   |                                           |   |   |                                    |   |   |                                      |   |
| Allowance                for sales returns        |   | $      | 186                                             |   | $      | 1,278                                          |   | $      | (1,001                                  | )      | $      | 463                                       |   |

*(in      thousands):*

|                                            |   | **Fiscal                Years Ended** |   |
|-------------------------------------------------|--------|---------------------------------------|--------|
|                                            |   | **March                31, 2007**     |   | **April                1, 2006** |   | **April                2, 2005** |   |
| Current                                         |   |                                  |   |   |   |  |   |   |  |   |
| Federal                                         |   | $                                     | 11,881 |   | $ | 6,733 |   | $ | 4,487 |   |
| State                                           |   |                                  | 1,131  |   |   | 162 |   |   | 167 |   |
| Non-US                                          |   |                                  | 177    |   |   | 59 |   |   | 878 |   |
|                                            |   |                                  | 13,189 |   |   | 6,954 |   |   | 5,532 |   |
| Deferred                                        |   |                                  |   |   |   |   |   |   |   |   |
| Federal                                         |   |                                  | (1,238 | ) |   | (310 | ) |   | (2,381 | ) |
| State                                           |   |                                  | 118    |   |   | 634 |   |   | (51 | ) |
| Non-US                                          |   |                                  | 2      |   |   | 50 |   |   | -- |   |
|                                            |   |                                  | (1,118 | ) |   | 374 |   |   | (2,432 | ) |
|                                            |   |                                  |   |   |   |   |   |   |   |   |
| Total                Provision for income taxes |   | $                                     | 12,071 |   | $ | 7,328 |   | $ | 3,100 |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

|                                                        |   | **Fiscal                Years Ended** |   |
|-------------------------------------------------------------|--------|---------------------------------------|--------|
|                                                        |   | **March                31, 2007**     |   | **April                1, 2006** |   | **April                2, 2005** |   |
| Tax                provision at US statutory rates          |   |                                  | 35     | % |   | 35 | % |   | 35 | % |
| State                tax provision, net of Federal benefits |   |                                  | 4      |   |   | 4 |   |   | 3 |   |
| Tax                credits                                  |   |                                  | (1     | ) |   | (3 | ) |   | (6 | ) |
| Foreign                earnings tax differential            |   |                                  | --     |   |   | -- |   |   | 2 |   |
| Tax                exempt investment income                 |   |                                  | (4     | ) |   | (3 | ) |   | (2 | ) |
| Stock                Based Compensation                     |   |                                  | 2      |   |   | -- |   |   | -- |   |
| Other                                                       |   |                                  | --     |   |   | (1 | ) |   | -- |   |
|                                                        |   |                                  | 36     | % |   | 32 | % |   | 32 | % |

*(in      thousands):*

|                                                              |   | **Fiscal                Years Ended** |                              |
|-------------------------------------------------------------------|--------|---------------------------------------|-----------------------------------|
| Deferred                tax assets:                               |   |                                  | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **April                2, 2005** |   |
| Accrued                employee benefits                          |   | $                                     | 1,207                             |   | $ | 784 |   | $ | 733 |   |
| Stock-based                compensation                           |   |                                  | 104                               |   |   | -- |   |   | -- |   |
| Inventory                reserves                                 |   |                                  | 2,635                             |   |   | 1,890 |   |   | 1,604 |   |
| Accrued                liabilities                                |   |                                  | 2,727                             |   |   | 2,785 |   |   | 2,287 |   |
| Deferred                revenue on shipments to distributors      |   |                                  | 1,145                             |   |   | 1,358 |   |   | 1,421 |   |
| Allowances                for doubtful accounts and sales returns |   |                                  | 305                               |   |   | 226 |   |   | 277 |   |
| Depreciation                and amortization                      |   |                                  | 899                               |   |   | 792 |   |   | 1,234 |   |
| Tax                credits                                        |   |                                  | --                                |   |   | 738 |   |   | 877 |   |
| Total                Deferred tax assets                          |   | $                                     | 9,022                             |   | $ | 8,573 |   | $ | 8,433 |   |

*(in      thousands):*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

|                         |   | **Fiscal                Years Ended** |   |
|------------------------------|--------|---------------------------------------|--------|
|                         |   | **March                31, 2007**     |   | **April                1, 2006** |   | **April                2, 2005** |   |
| United                States |   | $                                     | 32,834 |   | $ | 22,514 |   | $ | 7,489 |   |
| Foreign                      |   |                                  | 664    |   |   | 691 |   |   | 2,070 |   |
|                         |   | $                                     | 33,498 |   | $ | 23,205 |   | $ | 9,559 |   |

|                                        |   | **Fiscal                Years Ended** |      |
|---------------------------------------------|--------|---------------------------------------|-----------|
|                                        |   | **March                31, 2007**     |      | **April                1, 2006** |   | **April                2, 2005** |   |
| Number                of shares repurchased |   |                                  | 55,000    |   |   | 67,900 |   |   | 26,400 |   |
| Cost                of shares repurchased   |   | $                                     | 1,853,000 |   | $ | 1,080,000 |   | $ | 414,000 |   |
| Average                price per share      |   | $                                     | 33.70     |   | $ | 15.91 |   | $ | 15.68 |   |

*Profit      Sharing Plan --*

*Savings      and Retirement Plan --*

*Supplemental      Employee Retirement Plan -- *

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*Employee      Stock Purchase Plan -- *

* *

*Stock      Option Plans --*

|                                              |   |                                            |    |             |   | **Options                Outstanding**  |   |                                                   |                          |                                                                       |   |
|---------------------------------------------------|--------|-------------------------------------------------|---------|------------------|--------|----------------------------------------------|--------|--------------------------------------------------------|-------------------------------|----------------------------------------------------------------------------|--------|
|                                              |   | **Available For              Grant**  |    | **Shares**  |   | **Price              Per Share**        |   | **Weighted              Average Exercise Price**  |                          | **Weighted              Average Remaining Contractual Term (years)**  |   | **Aggregate              Intrinsic Value**  |   |
| Balance,                April 3, 2004             |   |                                            | --      |             |   | 962,230                                      |   | $                                                      | 10.31                - $46.34 |                                                                       | $      | 17.10 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                            | --      |             |   | (150,020                                     | )      |                                                   | 10.31                - 19.56  |                                                                       |   | 12.13 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                            | 14,560  |             |   | (14,560                                      | )      |                                                   | 12.53                - 46.34  |                                                                       |   | 21.30 |   |   |   |   |   |   |   |
| Expired                                           |   |                                            | (14,560 | )                |   | --                                           |   |                                                   |                          |                                                                       |   |   |   |   |   |   |   |   |   |
| Balance,                April 2, 2005             |   |                                            | --      |             |   | 797,650                                      |   |                                                   | 10.31                - 46.34  |                                                                       |   | 17.96 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                            | --      |             |   | (423,360                                     | )      |                                                   | 10.31                - 28.31  |                                                                       |   | 14.37 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                            | 39,400  |             |   | (39,400                                      | )      |                                                   | 10.75                - 46.34  |                                                                       |   | 15.34 |   |   |   |   |   |   |   |
| Expired                                           |   |                                            | (39,400 | )                |   | --                                           |   |                                                   |                          |                                                                       |   |   |   |   |   |   |   |   |   |
| Balance,                April 1, 2006             |   |                                            | --      |             |   | 334,890                                      |   |                                                   | 10.75                - 46.34  |                                                                       |   | 22.80 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                            | --      |             |   | (116,890                                     | )      |                                                   | 12.53                - 46.34  |                                                                       |   | 20.21 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                            | 1,500   |             |   | (1,500                                       | )      |                                                   | 46.34                - 46.34  |                                                                       |   | 46.34 |   |   |   |   |   |   |   |
| Expired                                           |   |                                            | (1,500  | )                |   | --                                           |   |                                                   |                          |                                                                       |   |   |   |   |   |   |   |   |   |
| Balance,                March 31, 2007            |   |                                            | --      |             |   | 216,500                                      |   | $                                                      | 10.75                - $46.34 |                                                                       | $      | 24.04 |   |   | 0.87 |   | $ | 1,986,241 |   |
| Exercisable/Vested,                March 31, 2007 |   |                                            |    |             |   | 198,500                                      |   |                                                   |                          |                                                                       | $      | 25.24 |   |   | 0.84 |   | $ | 1,581,961 |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

|                                              |   |                                   |      | **Options                Outstanding** |   |
|---------------------------------------------------|--------|----------------------------------------|-----------|----------------------------------------|--------|
|                                              |   | **Available                For Grant** |      | ** ****Shares**                   |   | **Price                Per Share** |   | **Weighted                Average****Exercise                Price** |   | **Weighted                Average Remaining Contractual Term (years)** |   | **Aggregate                Intrinsic Value** |   |
| Balance,                April 3, 2004             |   |                                   | 1,478,949 |                                   |   | 517,600 |   | $ | 11.30                - $21.31 |   | $ | 16.67 |   |   |   |   |   |   |   |
| Granted                                           |   |                                   | (205,600  | )                                      |   | 205,600 |   |   | 15.67                - 21.75 |   |   | 17.94 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                   | --        |                                   |   | (33,110 | ) |   | 11.30                - 18.52 |   |   | 15.42 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                   | 48,560    |                                   |   | (48,560 | ) |   | 11.30                - 21.75 |   |   | 17.06 |   |   |   |   |   |   |   |
| Balance,                April 2, 2005             |   |                                   | 1,321,909 |                                   |   | 641,530 |   |   | 11.30                - 21.75 |   |   | 17.11 |   |   |   |   |   |   |   |
| Granted                                           |   |                                   | (342,800  | )                                      |   | 342,800 |   |   | 17.39                - 42.24 |   |   | 30.71 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                   | --        |                                   |   | (129,441 | ) |   | 11.30                - 21.75 |   |   | 17.04 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                   | 72,560    |                                   |   | (72,560 | ) |   | 11.30                - 42.24 |   |   | 20.43 |   |   |   |   |   |   |   |
| Balance,                April 1, 2006             |   |                                   | 1,051,669 |                                   |   | 782,329 |   |   | 11.30                - 42.24 |   |   | 22.77 |   |   |   |   |   |   |   |
| Granted                                           |   |                                   | (226,650  | )                                      |   | 226,650 |   |   | 35.37                - 46.92 |   |   | 41.52 |   |   |   |   |   |   |   |
| Exercised                                         |   |                                   | --        |                                   |   | (112,549 | ) |   | 11.30                - 33.67 |   |   | 17.02 |   |   |   |   |   |   |   |
| Canceled                                          |   |                                   | 60,560    |                                   |   | (60,560 | ) |   | 17.34                - 42.24 |   |   | 32.82 |   |   |   |   |   |   |   |
| Balance,                March 31, 2007            |   |                                   | 885,579   |                                   |   | 835,870 |   | $ | 11.30                - $46.92 |   | $ | 27.90 |   |   | 5.17 |   | $ | 4,436,976 |   |
| Exercisable/Vested,                March 31, 2007 |   |                                   |      |                                   |   | 165,140 |   |   |   |   | $ | 20.84 |   |   | 4.09 |   | $ | 2,042,575 |   |

|                                |   | **Options                Outstanding** |            | **Options                Exercisable** |   |
|-------------------------------------|--------|----------------------------------------|-----------------|----------------------------------------|--------|
| **Range                of**         |   |                                   |            |                                   |   | **Weighted-Average****Remaining** |    |   | **Weighted-** |   |   |   |   |   | **Weighted-** |   |
| **Exercise**                        |   |                                   | **Number**      |                                   |   | ** Contractual** |   |   | **Average** |   |   | **Number** |   |   | **Average** |   |
| **Prices**                          |   |                                   | **Outstanding** |                                   |   | **Life                (Years** | **)** |   | **Exercise                Price** |   |   | **Outstanding** |   |   | **Exercise                Price** |   |
|                                |   |                                   |            |                                   |   |   |   |   |   |   |   |   |   |   |   |   |
| $10.75                - $15.83      |   |                                   | 168,675         |                                   |   | 1.70 |   | $ | 12.12 |   |   | 122,675 |   | $ | 11.90 |   |
|                  17.06 - 18.52 |   |                                   | 302,965         |                                   |   | 4.03 |   |   | 17.31 |   |   | 96,565 |   |   | 17.33 |   |
|                  19.37 - 29.00 |   |                                   | 93,880          |                                   |   | 3.87 |   |   | 23.18 |   |   | 37,080 |   |   | 20.99 |   |
|                  33.67 - 46.92 |   |                                   | 486,850         |                                   |   | 5.42 |   |   | 39.15 |   |   | 107,320 |   |   | 42.31 |   |
| $                10.75 - $46.92     |   |                                   | 1,052,370       |                                   |   | 4.29 |   | $ | 27.11 |   |   | 363,640 |   | $ | 23.24 |   |

*Stock-based      Compensation*

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*(in      thousands, except per share data):*

|                                                                                                                                                         |   | **Fiscal                Years Ended** |         |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------|--------------|
| *(in                thousands, except per share amount)*                                                                                                     |   |                                  | **1-Apr-06** |   |   | **2-Apr-05** |   |
| Net                income - as reported                                                                                                                      |   | $                                     | 15,877       |   | $ | 6,459 |   |
| Stock-based                employee compensation expense determined under fair value based method                related to stock options                    |   |                                  | (834         | ) |   | (1,141 | ) |
| Stock-based                employee compensation expense determined under fair value based method                related to the employee stock purchase plan |   |                                  | (147         | ) |   | (131 | ) |
| Net                income - pro forma                                                                                                                        |   | $                                     | 14,896       |   | $ | 5,187 |   |
| Net                earnings per share - basic:                                                                                                               |   |                                  |         |   |   |   |   |
| As                reported                                                                                                                                   |   | $                                     | 1.19         |   | $ | 0.50 |   |
| Pro                forma                                                                                                                                     |   | $                                     | 1.12         |   | $ | 0.40 |   |
| Net                earnings per share - diluted                                                                                                              |   |                                  |         |   |   |   |   |
| As                reported                                                                                                                                   |   | $                                     | 1.15         |   | $ | 0.49 |   |
| Pro                forma                                                                                                                                     |   | $                                     | 1.10         |   | $ | 0.40 |   |

***Impact      of the Adoption of SFAS 123R.***

*(in      thousands, except per share data)*

| Stock-based                compensation expense included in:                         |   |   | **Year                Ended March 31, 2007** |   |
|--------------------------------------------------------------------------------------|--------|--------|----------------------------------------------|--------|
| Cost                of sales                                                         |   | $      | 302                                          |   |
| Research                and development expenses                                     |   |   | 1,382                                        |   |
| Selling,                general and administrative expenses                          |   |   | 735                                          |   |
| Stock-based                compensation expense effect on income before income taxes |   |   | 2,419                                        |   |
| Income                tax effect                                                     |   |   | (                205                         | )      |
| Net                effect on net income                                              |   | $      | 2,214                                        |   |
|                                                                                 |   |   |                                         |   |
| Effect                on cashflows:                                                  |   |   |                                         |   |
| Cashflows                from operating activities                                   |   | $      | (                1,008                       | )      |
| Cashflows                from financing activities                                   |   |   | 1,008                                        |   |
| Effect                on net income per common share:                                |   |   |                                         |   |
| Basic                                                                                |   | $      | 0.16                                         |   |
| Diluted                                                                              |   | $      | 0.16                                         |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

***Valuation      Assumptions***

|                                          |   |                                              |   |                                   |   |
|-----------------------------------------------|--------|---------------------------------------------------|--------|----------------------------------------|--------|
|                                          |   | **Directors                & Officers**  |   | **All                Other Employees** |   |
| Expected                term (years)          |   |                                              | 5.8    |                                   |   | 4.3 |   |
| Stock                volatility               |   |                                              | 51.0   | %                                      |   | 47.0 | % |
| Risk                free interest rates       |   |                                              | 4.7    | %                                      |   | 4.7 | % |
| Dividends                during expected term |   |                                              | 0.0    | %                                      |   | 0.0 | % |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

| *(in                thousands, except per share value)*     |   | **Fiscal                Years Ended** |   |
|-------------------------------------------------------------|--------|---------------------------------------|--------|
|                                                        |   | **March                31, 2007**     |   | **April                1, 2006** |   | **April                2, 2005** |   |
| BASIC:                                                      |   |                                  |   |   |   |   |   |   |   |   |
| Weighted                average shares outstanding          |   |                                  | 13,715 |   |   | 13,313 |   |   | 12,985 |   |
| Net                income                                   |   | $                                     | 21,427 |   | $ | 15,877 |   | $ | 6,459 |   |
| Net                income per share                         |   | $                                     | 1.56   |   | $ | $1.19 |   | $ | $0.50 |   |
|                                                        |   |                                  |   |   |   |   |   |   |   |   |
| DILUTED:                                                    |   |                                  |   |   |   |   |   |   |   |   |
| Weighted                average shares outstanding          |   |                                  | 13,715 |   |   | 13,313 |   |   | 12,985 |   |
| Effect                of dilutive securities: stock options |   |                                  | 325    |   |   | 457 |   |   | 254 |   |
| Total                                                       |   |                                  | 14,040 |   |   | 13,770 |   |   | 13,239 |   |
| Net                income                                   |   | $                                     | 21,427 |   | $ | 15,877 |   | $ | 6,459 |   |
| Net                income per share                         |   | $                                     | 1.53   |   | $ | 1.15 |   | $ | 0.49 |   |
|                                                        |   |                                  |   |   |   |   |   |   |   |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*(in      thousands)*

|                                              |   | **Fiscal                Years Ended** |                              |
|---------------------------------------------------|--------|---------------------------------------|-----------------------------------|
| Net                Sales                          |   |                                  | **March                31, 2007** |   |   | **April                1, 2006** |   |   | **April                2, 2005** |   |
| China                                             |   | $                                     | 32,449                            |   | $ | 23,835 |   | $ | 6,161 |   |
| Asia                (excluding China & Japan) |   |                                  | 16,209                            |   |   | 10,417 |   |   | 5,050 |   |
| United                States                      |   |                                  | 29,265                            |   |   | 29,802 |   |   | 31,796 |   |
| Europe                                            |   |                                  | 11,834                            |   |   | 6,387 |   |   | 5,133 |   |
| Japan                                             |   |                                  | 6,860                             |   |   | 7,284 |   |   | 6,673 |   |
| Other                                             |   |                                  | 1,403                             |   |   | 2,373 |   |   | 1,745 |   |
| Total                Net Sales                    |   | $                                     | 98,020                            |   | $ | 80,098 |   | $ | 56,558 |   |

*(in      thousands):*

|                                              |   | **March                31, 2007** |   | **April                1, 2006** |   |
|---------------------------------------------------|--------|-----------------------------------|--------|----------------------------------|--------|
| United                States                      |   | $                                 | 7,516  |                             | $      | 7,006 |   |
| Hong                Kong                          |   |                              | 1,135  |                             |   | 1,042 |   |
| Property,                plant and equipment, net |   | $                                 | 8,651  |                             | $      | 8,048 |   |

----

**SUPERTEX,      INC.**

**NOTES      TO CONSOLIDATED FINANCIAL STATEMENTS - **

*      (in      thousands):*

| **Fiscal                Years** |   |   | **Operating                Lease** |   |
|---------------------------------|--------|--------|------------------------------------|--------|
| 2008                            |   | $      | 1,017                              |   |
| 2009                            |   |   | 1,524                              |   |
| 2010                            |   |   | 1,006                              |   |
| 2011                            |   |   | 961                                |   |
| 2012                            |   |   | 80                                 |   |
| Thereafter                      |   |   | --                                 |   |
|                            |   | $      | 4,588                              |   |

*** ***

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**SUPERTEX,      INC.**

**EXHIBIT      INDEX**

|  11                     |  Deferred                Compensation Plan (Supplemental Employee Retirement Plan), which                became                effective January 1, 1996. |
|----------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 31.1                              | Certification                of Chief Executive Officer pursuant to Securities Exchange Act Rules                13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the                Sarbanes-Oxley Act of 2002. |
|--------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 31.2                              | Certification                of Chief Financial Officer pursuant to Securities Exchange Act Rules                13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the                Sarbanes-Oxley Act of 2002. |
|--------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 32.1                              | Certification                of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as                adopted                pursuant to Section 906 of the Sarbanes-Oxley Act of                2002. |
|--------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 32.2                               | Certification                of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as                adopted                pursuant to Section 906 of the Sarbanes-Oxley Act of                2002. |
|--------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

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**EXHIBIT      21.1**

**SUBSIDIARIES      OF THE REGISTRANT**

| **Name**                        | **Jurisdiction                of****Incorporation** | **Year****Organized** |
|---------------------------------|-----------------------------------------------------|-----------------------|
| Supertex                Limited | Hong                Kong                            | 2001                  |

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**EXHIBIT      23.1**

**CONSENT      OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

----

**EXHIBIT      31.1**

**CERTIFICATIONS      UNDER RULE 13A-14(A)/L5D-14(A)**

| (a)   | designed                such disclosure controls and procedures, or caused such disclosure                controls and procedures to be designed under my supervision, to ensure                that material information relating to the registrant, including its                consolidated subsidiaries, is made known to us by others within those                entities, particularly during the period in which this annual report                is                being prepared; |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | designed                such internal control over financial reporting, or caused such internal                control over financial reporting to be designed under my supervision,                to                provide reasonable assurance regarding the reliability of financial                reporting and the preparation of financial statements for external                purposes in accordance with generally accepted accounting                principles; |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | evaluated                the effectiveness of the registrant's disclosure controls and procedures                and presented in this report my conclusion about the effectiveness                of the                disclosure controls and procedures, as of the end of the period covered                by                this annual report based on such evaluation;                and |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | disclosed                in this report any change in the registrant’s internal control over                financial reporting that occurred during the registrant’s fourth fiscal                quarter that has materially affected, or is reasonably likely to                materially affect, the registrant’s internal control over financial                reporting; and |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (a)   | all                significant deficiencies and material weaknesses in the design or                operation of internal control over financial reporting which are                reasonably likely to adversely affect the registrant's ability to                record,                process, summarize, and report financial information; and |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | any                fraud, whether or not material, that involves management or other                employees who have a significant role in the registrant's internal                control                over financial reporting. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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**EXHIBIT      31.2**

**CERTIFICATIONS      UNDER RULE 13A-14(A)/L5D-14(A)**

| (e)   | designed                such disclosure controls and procedures, or caused such disclosure                controls and procedures to be designed under my supervision, to ensure                that material information relating to the registrant, including its                consolidated subsidiaries, is made known to us by others within those                entities, particularly during the period in which this annual report                is                being prepared; |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (f)   | designed                such internal control over financial reporting, or caused such internal                control over financial reporting to be designed under my supervision,                to                provide reasonable assurance regarding the reliability of financial                reporting and the preparation of financial statements for external                purposes in accordance with generally accepted accounting                principles; |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (g)   | evaluated                the effectiveness of the registrant's disclosure controls and procedures                and presented in this report my conclusion about the effectiveness                of the                disclosure controls and procedures, as of the end of the period covered                by                this annual report based on such evaluation;                and |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (h)   | disclosed                in this report any change in the registrant’s internal control over                financial reporting that occurred during the registrant’s fourth fiscal                quarter that has materially affected, or is reasonably likely to                materially affect, the registrant’s internal control over financial                reporting; and |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | all                significant deficiencies and material weaknesses in the design or                operation of internal control over financial reporting which are                reasonably likely to adversely affect the registrant's ability to                record,                process, summarize, and report financial information; and |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | any                fraud, whether or not material, that involves management or other                employees who have a significant role in the registrant's internal                control                over financial reporting. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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**EXHIBIT      32.1**

**STATEMENT      OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER UNDER 18 U.S.C.§ 1350**

|   | (i) | the                Annual Report of the Company on Form 10-K for the period ending April                1, 2006 (the “Report”), fully complies with the requirements of Section                13(a) or 15(d), whichever is applicable, of the Securities Exchange                Act of                1934, and |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | the                information contained in the Report fairly presents, in all material                respects, the financial condition and results of operations of the                Company. |
|--------|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| The                material contained in this Exhibit 32.1 is not deemed “filed” with the SEC                and is not to be incorporated by reference into any filing of the                Company                under the Securities Act of 1933 or the Securities Exchange Act of                1934,                whether made before or after the date hereof and irrespective of                any                general incorporation language contained in such filing. |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**EXHIBIT      32.2**

**STATEMENT      OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER UNDER 18 U.S.C.§ 1350**

|   | (i) | the                Annual Report of the Company on Form 10-K for the period ending April                1, 2006 (the “Report”), fully complies with the requirements of Section                13(a) or 15(d), whichever is applicable, of the Securities Exchange                Act of                1934, and |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | the                information contained in the Report fairly presents, in all material                respects, the financial condition and results of operations of the                Company. |
|--------|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| The                material contained in this Exhibit 32.2 is not deemed “filed” with the SEC                and is not to be incorporated by reference into any filing of the                Company                under the Securities Act of 1933 or the Securities Exchange Act of                1934,                whether made before or after the date hereof and irrespective of                any                general incorporation language contained in such filing. |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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