| **UNITED                STATES****SECURITIES                AND EXCHANGE COMMISSION**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| Washington,                D.C. 20549                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **FORM                10-Q**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
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| (MARK                ONE)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (x)                Quarterly Report Pursuant to Section 13 or 15(d) of the Securities                Exchange Act of 1934                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| **For                the quarterly period ended July 1, 2006**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| (                )                Transition Report Pursuant to Section 13 or 15(d) of the Securities                and                Exchange Act of 1934 (No Fee Required)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| **Commission                File No. 0-12718**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| **SUPERTEX,                INC.**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| (Exact                name of Registrant as specified in its Charter)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **California**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | **94-2328535** |
| (State                or other jurisdiction of incorporation or organization)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | (IRS                Employer Identification #) |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |
| **1235                Bordeaux Drive**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| **Sunnyvale,                California 94089**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| (Address                of principal executive offices)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Registrant's                Telephone Number, Including Area Code: **(408)                222-8888**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| 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                [ ]** |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |
| 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 [                ]                                                                                                     Accelerated filer [ X                ]                                                                                           Non-accelerated                filer [ ]** |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |
| Indicate                by check mark whether the registrant is a shell company (as defined                in                Rule 12b-2 of the Act).**                                          Yes [                ]                                                                                                                                                                No [ X ]**                                                                                                                                                                          |
| Indicate                the number of shares outstanding of each of the issuer’s classes of common                stock, as of the latest practicable date.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| Class                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | Outstanding                at July 28, 2006 |
| Common                Stock, no par value                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 13,682,555 |
| *Exhibit                index is on Page 27*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| *Total                number of pages: 30*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |

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**SUPERTEX,      INC.**

**QUARTERLY      REPORT - FORM 10Q**

| Table                of Contents |                                                                                                                      | Page                No. |
|----------------------------------|---------------------------------------------------------------------------------------------------------------------------|-------------------------|
|                             | PART                I - FINANCIAL INFORMATION                                                                             |                    |
| Item                1.           | Financial                Statements                                                                                       |                    |
|                             | Unaudited                Condensed Consolidated Statements of Income                                                      | 3                       |
|                             | Unaudited                Condensed Consolidated Balance Sheets                                                            | 4                       |
|                             | Unaudited                Condensed Consolidated Statements of Cash Flows                                                  | 5                       |
|                             | Notes                to Unaudited Condensed Consolidated Financial Statements                                             | 6                       |
| Item                2.           | Management’s                Discussion and Analysis of Financial Condition and Results of                Operations | 17                      |
| Item                3.           | Quantitative                and Qualitative Disclosures About Market Risk and Interest Rate                Risk           | 25                      |
| Item                4.           | Controls                and Procedures                                                                                    | 26                      |
|                             |                                                                                                                      |                    |
|                             | PART                II - OTHER INFORMATION                                                                                |                    |
| Item                1.           | Legal                Proceedings                                                                                          | 27                      |
| Item                1A.          | Risk                Factors                                                                                               | 27                      |
| Item                2.           | Unregistered                Sales of Equity Securities and Use of Proceeds                                                | 27                      |
| Item                3.           | Defaults                Upon Senior Securities                                                                            | 27                      |
| Item                4.           | Submission                of Matters to a Vote of Security Holders                                                        | 27                      |
| Item                5.           | Other                Information                                                                                          | 27                      |
| Item                6.           | Exhibits                                                                                                                  | 27                      |
|                             |                                                                                                                      |                    |
| Signature                        |                                                                                                                      | 28                      |

----

**PART      I - FINANCIAL INFORMATION**

**Item      1. Financial Statements**

**SUPERTEX,      INC.**

**CONDENSED      CONSOLIDATED STATEMENTS OF INCOME**

*(unaudited)*

*(in      thousands, except per share amounts)*

|                                                                                                                                            |   | **Three                Months Ended**  |
|------------------------------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------------|
|                                                                                                                                            |   |                                        | **     July                1, 2006** |   |   | **July                2, 2005** |   |
|  Net                sales                                                                                                                       |   | $                                           | 24,565 |   | $ | 15,993 |   |
|  Cost                of sales(1)                                                                                                                |   |                                        | 9,837 |   |   | 6,806 |   |
|  Gross                profit                                                                                                                    |   |                                        | 14,728 |   |   | 9,187 |   |
|  Research                and development(1)                                                                                                     |   |                                        | 3,949 |   |   | 2,759 |   |
|  Selling,                general and administrative(1)                                                                                          |   |                                        | 3,803 |   |   | 3,188 |   |
|  Total                operating expenses                                                                                                        |   |                                        | 7,752 |   |   | 5,947 |   |
|  Income                from operations                                                                                                          |   |                                        | 6,976 |   |   | 3,240 |   |
|  Interest                income                                                                                                                 |   |                                        | 1,111 |   |   | 627 |   |
|  Other                income, net                                                                                                               |   |                                        | 177 |   |   | 279 |   |
|  Income                before provision for income taxes                                                                                        |   |                                        | 8,264 |   |   | 4,146 |   |
|  Provision                for income taxes                                                                                                      |   |                                        | 3,348 |   |   | 1,327 |   |
|  Net                income                                                                                                                      |   | $                                           | 4,916 |   | $ | 2,819 |   |
|  Net                income per share:                                                                                                           |   |                                        |   |   |   |   |   |
|  Basic                                                                                                                                          |   | $                                           | 0.36 |   | $ | 0.22 |   |
|  Diluted                                                                                                                                        |   | $                                           | 0.35 |   | $ | 0.21 |   |
|                                                                                                                                                 |   |                                        |   |
| Shares                used in per share computation:                                                                                                 |   |                                        |   |
|  Basic                                                                                                                                          |   |                                        | 13,646 |   |   | 13,078 |   |
|  Diluted                                                                                                                                        |   |                                        | 14,009 |   |   | 13,215 |   |
|                                                                                                                                                 |   |                                        |   |   |   |   |   |
|  (1)Includes                amortization of stock-based compensation as follows. See Note 2 for                more                information: |   |                                        |   |   |   |   |   |
|                      Cost of sales                                                                                          |   | $                                           | 65 |   | $ | -- |   |
|                       Research and development                                                                         |   | $                                           | 387 |   | $ | -- |   |
|                       Selling, general and administrative                                                              |   | $                                           | 196 |   | $ | -- |   |

*                                                              See accompanying Notes to Unaudited Condensed Consolidated Financial      Statements.*

----

**SUPERTEX,      INC.**

**CONDENSED      CONSOLIDATED BALANCE SHEETS**

*(unaudited,      in thousands)*

|                                                                                                                                       |   |   | **July              1, 2006**  |   |   | **April                1, 2006** |   |
|--------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|-------------------------------------|--------|--------|----------------------------------|--------|
| **ASSETS**                                                                                                                                 |   |   |                                |   |   |                             |   |
| Current                assets:                                                                                                             |   |   |                                |   |   |                             |   |
| Cash                and cash equivalents                                                                                                   |   | $      | 21,315                              |   | $      | 27,654                           |   |
|                            Short-term investments                                   |   |   | 100,550                             |   |   | 82,992                           |   |
| Trade                accounts receivable, net of allowances of $619 and $672                                                               |   |   | 16,046                              |   |   | 14,824                           |   |
| Inventories                                                                                                                                |   |   | 12,452                              |   |   | 12,543                           |   |
| Prepaid                expenses and other current assets                                                                                   |   |   | 1,651                               |   |   | 1,358                            |   |
| Deferred                income taxes                                                                                                       |   |   | 7,781                               |   |   | 7,781                            |   |
|                      Total                current assets                                                          |   |   | 159,795                             |   |   | 147,152                          |   |
| Property,                plant and equipment, net                                                                                          |   |   | 8,484                               |   |   | 8,048                            |   |
| Other                assets                                                                                                                |   |   | 146                                 |   |   | 141                              |   |
| Deferred                income taxes                                                                                                       |   |   | 792                                 |   |   | 792                              |   |
| **TOTAL                ASSETS**                                                                                                            |   | $      | 169,217                             |   | $      | 156,133                          |   |
|                                                                                                                                       |   |   |                                |   |   |                             |   |
| **LIABILITIES                AND SHAREHOLDERS' EQUITY**                                                                                    |   |   |                                |   |   |                             |   |
| Current                liabilities:                                                                                                        |   |   |                                |   |   |                             |   |
| Trade                accounts payable                                                                                                      |   | $      | 4,926                               |   | $      | 3,725                            |   |
| Accrued                salaries and employee benefits                                                                                      |   |   | 11,056                              |   |   | 11,227                           |   |
| Other                accrued liabilities                                                                                                   |   |   | 1,590                               |   |   | 1,498                            |   |
| Deferred                revenue                                                                                                            |   |   | 5,199                               |   |   | 3,566                            |   |
| Income                taxes payable                                                                                                        |   |   | 6,015                               |   |   | 2,693                            |   |
|                      Total                current liabilities                                                     |   |   | 28,786                              |   |   | 22,709                           |   |
| Commitments                and contingencies (See Note 7)                                                                                  |   |   |                                |   |   |                             |   |
|                                                                                                                                       |   |   |                                |   |   |                             |   |
| 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 13,679 and 13,608 shares |   |   | 48,783                              |   |   | 46,692                           |   |
| Retained                earnings                                                                                                           |   |   | 91,648                              |   |   | 86,732                           |   |
|                      Total                shareholders' equity                                                    |   |   | 140,431                             |   |   | 133,424                          |   |
| **                     TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY**                                               |   | $      | 169,217                             |   | $      | 156,133                          |   |
|                                                                                                                                       |   |   |                                |
| *See                accompanying Notes to Unaudited Condensed Consolidated Financial                Statements.*                           |   |   |                                |

----

**SUPERTEX,      INC.**

**CONDENSED      CONSOLIDATED STATEMENTS OF CASH FLOWS**

*(unaudited,      in thousands)*

|                                                                                                                            |   | **Three                Months Ended** |                            |
|---------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------|---------------------------------|
| CASH                FLOWS FROM OPERATING ACTIVITIES                                                                             |   |                                  | **July                1, 2006** |   |   | **July                2, 2005** |   |
|                  Net income                                                                                                |   | $                                     | 4,916                           |   | $ | 2,819 |   |
|                  Non-cash adjustments to net income:                                                                       |   |                                  |                            |   |   |   |   |
| Depreciation                                                                                                                    |   |                                  | 609                             |   |   | 680 |   |
| Reduction                in provision for doubtful accounts and sales returns                                                   |   |                                  | (162                            | ) |   | (398 | ) |
| Provision                for excess and obsolete inventories                                                                    |   |                                  | 597                             |   |   | 357 |   |
| Stock-based                compensation expense related to stock options and                purchases                           |   |                                  | 648                             |   |   | -- |   |
| Excess                tax benefit related to stock-based compensation plans                                                     |   |                                  | (265                            | ) |   | -- |   |
| Changes                in operating assets and liabilities:                                                                     |   |                                  |                            |   |   |   |   |
| Short-term                investments, categorized as trading                                                                   |   |                                  | (133                            | ) |   | (305 | ) |
| Trade                accounts receivable                                                                                        |   |                                  | (1,060                          | ) |   | (807 | ) |
| Inventories                                                                                                                     |   |                                  | (506                            | ) |   | (843 | ) |
| Prepaid                expenses and other assets                                                                                |   |                                  | (298                            | ) |   | 100 |   |
| Trade                accounts payable and accrued expenses                                                                      |   |                                  | 1,122                           |   |   | 644 |   |
| Deferred                revenue                                                                                                 |   |                                  | 1,633                           |   |   | (428 | ) |
| Income                taxes payable                                                                                             |   |                                  | 3,322                           |   |   | 1,322 |   |
|              Total                adjustments                  |   |                                  | 5,507                           |   |   | 322 |   |
| Net                cash provided by operating activities                                                                        |   |                                  | 10,423                          |   |   | 3,141 |   |
| CASH                FLOWS FROM INVESTING ACTIVITIES                                                                             |   |                                  |                            |   |   |   |   |
|                  Purchases of property, plant and equipment                                                                |   |                                  | (1,045                          | ) |   | (409 | ) |
|                  Purchases of short-term investments, categorized as available for                sale                     |   |                                  | (199,474                        | ) |   | (218,100 | ) |
|                  Sales of short-term investments, categorized as available for                sale                         |   |                                  | 182,050                         |   |   | 188,049 |   |
| Net                cash used in investing activities                                                                            |   |                                  | (18,469                         | ) |   | (30,460 | ) |
| CASH                FLOWS FROM FINANCING ACTIVITIES                                                                             |   |                                  |                            |   |   |   |   |
|                  Proceeds from exercise of stock options and employee stock purchase                plan                   |   |                                  | 1,442                           |   |   | 524 |   |
| Excess                tax benefit related to stock-based compensation plans                                                     |   |                                  | 265                             |   |   |  -- |   |
|                  Repurchase of common stock                                                                                |   |                                  | --                              |   |   | (1,080 | ) |
| Net                cash provided by (used in) financing activities                                                              |   |                                  | 1,707                           |   |   | (556 | ) |
|  NET                DECREASE IN CASH AND CASH EQUIVALENTS                                                                  |   |                                  | (6,339                          | ) |   | (27,875 | ) |
| CASH                AND CASH EQUIVALENTS:                                                                                       |   |                                  |                            |   |   |   |   |
| Beginning                of period                                                                                              |   |                                  | 27,654                          |   |   | 38,634 |   |
| End                of period                                                                                                    |   | $                                     | 21,315                          |   | $ | 10,759 |   |
| Supplemental                cash flow disclosures:                                                                              |   |                                  |                            |   |   |   |   |
| Income                taxes paid, net of refunds                                                                                |   | $                                     | 26                              |   | $ | 5 |   |
|                                                                                                                            |   |                                  |                            |
| *See                accompanying Notes                to Unaudited Condensed Consolidated Financial                Statements.* |   |                                  |                            |

----

**                  SUPERTEX, INC.**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**(unaudited)**

**Note      1 - Organization and Basis of Presentation**

**Note      2 - Stock-Based Compensation**

----

**                  SUPERTEX, INC.**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -          (CONTINUED)**

**(unaudited)**

***Prior      to the Adoption of SFAS 123R.***

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

|                                                                                                                                                         |   | **Three              Months              Ended**  |   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------------------------------|--------|
|                                                                                                                                                         |   | **July                2, 2005**                        |   |
| Net                Income - as reported                                                                                                                      |   | $                                                      | 2,819  |   |
| Stock-based                employee compensation expense determined under fair value based method                related to stock options                    |   |                                                   | (346   | ) |
| Stock-based                employee compensation expense determined under fair value based method                related to the employee stock purchase plan |   |                                                   | (19    | ) |
| Net                Income - pro forma                                                                                                                        |   | $                                                      | 2,454  |   |
| Net                earnings per share - basic:                                                                                                               |   |                                                   |   |   |
| As                reported                                                                                                                                   |   | $                                                      | 0.22   |   |
| Pro                forma                                                                                                                                     |   | $                                                      | 0.19   |   |
| Net                earnings per share - diluted                                                                                                              |   |                                                   |   |   |
| As                reported                                                                                                                                   |   | $                                                      | 0.21   |   |
| Pro                forma                                                                                                                                     |   | $                                                      | 0.19   |   |

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

*(in thousands, except per      share data)*

|                                                          |   | **Three              Months              Ended**  |   |
|---------------------------------------------------------------|--------|--------------------------------------------------------|--------|
|                                                          |   | **July                1, 2006**                        |   |
| Stock-based                compensation expense               |   | $                                                      | 648    |   |
| Tax                effect of stock-based compensation expense |   |                                                   | (48    | ) |
| Net                effect on net income                       |   | $                                                      | 600    |   |
| Tax                effect on:                                 |   |                                                   |   |   |
| Cash                flows from operating activities           |   | $                                                      | (265   | ) |
| Cash                flows from financing activities           |   | $                                                      | 265    |   |
| Effect                on earnings per share:                  |   |                                                   |   |   |
| Basic                                                         |   | $                                                      | 0.04   |   |
| Diluted                                                       |   | $                                                      | 0.04   |   |

----

**                    SUPERTEX, INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

***Valuation      Assumptions***

|                                            |                                         **Three Months Ended** |   |                      **Three Months Ended** |
|-------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------------------------------------------------------|
|                                            | **July                  1, 2006**                                                                                                                                            |   | **July                  2, 2005**                                    |
|                                            | **D&O**                                                                                                                                                                  |   | **All                  Others**                                      |   | **D&O                  and All Others** |
| Expected                  term (years)          | 5.75                                                                                                                                                                         |   | 4.50                                                                 |   | 4.60 |
| Stock                  volatility               |                     58%                                                                                                                                            |   |                     52%                                    |   |                    50% |
| Risk                  free interest rates       | 5.04%                                                                                                                                                                        |   | 5.03%                                                                |   | 3.55% |
| Dividends                  during expected term |                       0%                                                                                                                                 |   |                       0%                         |   |                       0% |
| Forfeiture                  rate                |                     4.0%                                                                                                                                           |   |                     9.9%                                   |   |                       0% |

----

**SUPERTEX,          INC.**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -          (CONTINUED)**

**(unaudited)**

*Expected      Term*

*Expected      stock volatility*

*Risk-free      interest rate*

*Dividends      yield*

*Forfeiture      rate*

----

**SUPERTEX,          INC.**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -          (CONTINUED)**

**(unaudited)**

|                                                    |   |                                      |      | **Options                Outstanding** |   |
|---------------------------------------------------------|--------|-------------------------------------------|-----------|----------------------------------------|--------|
|                                                    |   | **Available                For****Grant** |      |  ** ****Shares**             |   | **Weighted                Average****Exercise                Price** |   |
| Balance,                April 3, 2004                   |   |                                      | 1,478,949 |                                   |   | 1,479,830 |   | $ | 16.67 |   |
|                      Granted   |   |                                      | (205,600  | )                                      |   | 205,600 |   |   | 17.94 |   |
|                      Exercised |   |                                      | --        |                                   |   | (183,130 | ) |   | 12.72 |   |
|                      Canceled  |   |                                      | 63,120    |                                   |   | (63,120 | ) |   | 18.04 |   |
|                      Expired   |   |                                      | (14,560   | )                                      |   | -- |   |   |   |   |
| Balance,                April 2, 2005                   |   |                                      | 1,321,909 |                                   |   | 1,439,180 |   | $ | 17.58 |   |
|                      Granted   |   |                                      | (342,800  | )                                      |   | 342,800 |   |   | 30.71 |   |
|                      Exercised |   |                                      | --        |                                   |   | (552,801 | ) |   | 14.99 |   |
|                      Canceled  |   |                                      | 111,960   |                                   |   | (111,960 | ) |   | 18.64 |   |
|                      Expired   |   |                                      | (39,400   | )                                      |   | -- |   |   |   |   |
| Balance,                April 1, 2006                   |   |                                      | 1,051,669 |                                   |   | 1,117,219 |   | $ | 22.93 |   |
|                      Granted   |   |                                      | (69,800   | )                                      |   | 69,800 |   |   | 40.56 |   |
|                      Exercised |   |                                      | --        |                                   |   | (53,544 | ) |   | 16.95 |   |
|                      Canceled  |   |                                      | 7,612     |                                   |   | (7,612 | ) |   | 33.38 |   |
|                      Expired   |   |                                      | --        |                                   |   | -- |   |   |   |   |
| Balance,                July 1, 2006                    |   |                                      | 989,481   |                                   |   | 1,125,863 |   | $ | 24.09 |   |

|                                              |   |                **Options                Outstanding**  |      |                **Options                Exercisable**                |   |
|---------------------------------------------------|--------|------------------------------------------------------------------|-----------|---------------------------------------------------------------------------|--------|
|  **Range                of Exercise Prices** |   |  **Number                Outstanding**                      |      | **Weighted-Average                Remaining Contractual Life****(Years)** |   |  **Weighted-Average                Exercise Price** |   |  **Number                Outstanding** |   |  **Weighted-Average                Exercise Price** |   |
| $10.75                - $15.83                    |   |                                                             | 247,845   |                                                                      |   | 2.09 |   | $ | 12.97 |   |   | 180,645 |   | $ | 12.98 |   |
|   17.06                - 18.52          |   |                                                             | 354,428   |                                                                      |   | 4.74 |   |   | 17.32 |   |   | 70,460 |   |   | 17.37 |   |
|                  19.37 - 29.00               |   |                                                             | 138,640   |                                                                      |   | 3.84 |   |   | 23.20 |   |   | 61,080 |   |   | 21.89 |   |
|                  33.67 - 46.34               |   |                                                             | 384,950   |                                                                      |   | 5.53 |   |   | 37.80 |   |   | 82,750 |   |   | 46.34 |   |
| $                10.75 - $46.34                   |   |                                                             | 1,125,863 |                                                                      |   | 4.32 |   | $ | 24.09 |   |   | 394,935 |   | $ | 22.13 |   |

----

**SUPERTEX,            INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

***Employee      Stock Purchase Plan (“ESPP”).***
* *

**Note      3 - Inventories**

*(in      thousands)*

|                           |   | **July                1, 2006** |   | **April                1, 2006** |   |
|--------------------------------|--------|---------------------------------|--------|----------------------------------|--------|
| Raw                materials   |   | $                               | 1,266  |                             | $      | 1,214 |   |
| Work-in-process                |   |                            | 7,133  |                             |   | 7,644 |   |
| Finished                goods  |   |                            | 4,053  |                             |   | 3,685 |   |
| Net                Inventories |   | $                               | 12,452 |                             | $      | 12,543 |   |

**Note      4 - Comprehensive Income **

**Note      5 - Income Taxes**

----

**SUPERTEX,            INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

*“Transition      Election Related to Accounting for Tax Effects of Share-Based Payment      Awards.”*

**Note      6 - Net Income per Share **

*in      thousands, except per share amounts*

|                                                              |   | **Three                Months Ended** |   |
|-------------------------------------------------------------------|--------|---------------------------------------|--------|
|                                                              |   | **July                1, 2006**       |   | **July                2, 2005** |   |
| BASIC:                                                            |   |                                  |   |   |   |   |   |
| Net                income                                         |   | $                                     | 4,916  |   | $ | 2,819 |   |
| Weighted                average shares outstanding for the period |   |                                  | 13,646 |   |   | 13,078 |   |
| Net                income per share                               |   | $                                     | 0.36   |   | $ | 0.22 |   |
|                                                              |   |                                  |   |   |   |   |   |
| DILUTED:                                                          |   |                                  |   |   |   |   |   |
| Net                income                                         |   | $                                     | 4,916  |   | $ | 2,819 |   |
| Weighted                average shares outstanding for the period |   |                                  | 13,646 |   |   | 13,078 |   |
| Dilutive                effect of stock options                   |   |                                  | 363    |   |   | 137 |   |
| Total                                                             |   |                                  | 14,009 |   |   | 13,215 |   |
| Net                income per share                               |   | $                                     | 0.35   |   | $ | 0.21 |   |

----

**SUPERTEX,            INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

**Note      7 - Commitments and Contingencies**

*Guarantor’s      Accounting and Disclosure Requirements for Guarantees, Including Indirect      Guarantees of Indebtedness of Others,*

***Indemnification***

***Legal      Proceedings***

***Product      Warranty***

----

**SUPERTEX,          INC.**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -          (CONTINUED)**

**(unaudited)**

*(in      thousands)*

| **Description**                                |   | **Balance                at Beginning of Period** |   | **Additions** | **(1)** | **Deductions** | ** (2)** | **Balance                at End of Period** |   |
|------------------------------------------------|--------|---------------------------------------------------|--------|---------------|---------|----------------|---------------|---------------------------------------------|--------|
| Three                months ended July 1, 2006 |   |                                              |   |          |    |           |          |                                        |   |   |   |   |   |
| Allowance                for sales returns     |   | $                                                 | 525    |          | $       | 153            |          | $                                           | 216    |   | $ | 462 |   |
|                                           |   |                                              |   |          |    |           |          |                                        |   |   |   |   |   |
| Three                months ended July 2, 2005 |   |                                              |   |          |    |           |          |                                        |   |   |   |   |   |
| Allowance                for sales returns     |   | $                                                 | 463    |          | $       | 354            |          | $                                           | 327    |   | $ | 490 |   |

*            (1) *

*Allowances      for sales returns are charged as a reduction to revenue. *

*            (2)*

*      Represents amounts written off against the allowance for sales      returns.*

***Operating      Lease Obligations***

*in      thousands*

| **Payment                Due by Year** |   | **Operating                Lease** |   | **Sublease                Income** |   |
|----------------------------------------|--------|------------------------------------|--------|------------------------------------|--------|
| Less                than 1 year        |   | $                                  | 1,011  |                               | $      | 316 |   |
| 2                years                 |   |                               | 898    |                               |   | 104 |   |
| 3                years                 |   |                               | 916    |                               |   | -- |   |
| 4                years                 |   |                               | 938    |                               |   | -- |   |
| 5                years                 |   |                               | 803    |                               |   | -- |   |
| Thereafter                             |   |                               | --     |                               |   | -- |   |
|                                   |   | $                                  | 4,566  |                               | $      | 420 |   |

*** ***
**Note      8 - Common Stock Repurchase**

|                                        |   | **Three                Months Ended** |   |
|---------------------------------------------|--------|---------------------------------------|--------|
|                                        |   | **July                1, 2006**       |   | **July                2, 2005** |   |
| Number                of shares repurchased |   |                                  | --     |   |   | 67,900 |   |
| Cost                of shares repurchased   |   |                                  | --     |   | $ | 1,080,000 |   |
| Average                price per share      |   |                                  | --     |   | $ | 15.91 |   |

----

**SUPERTEX,            INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

**Note      9 - Segment Information**

*(in      thousands)*

|                                  |   | **                        Three Months Ended** |   |
|---------------------------------------|--------|----------------------------------------------------------------------------------------|--------|
| **Net                Sales**          |   | **July                1, 2006**                                                        |   | **July                2, 2005** |   |
| United                States          |   | $                                                                                      | 7,527  |   | $ | 7,350 |   |
| Europe                                |   |                                                                                   | 2,419  |   |   | 1,305 |   |
| Japan                                 |   |                                                                                   | 1,950  |   |   | 1,734 |   |
| Asia                (excluding Japan) |   |                                                                                   | 12,067 |   |   | 3,641 |   |
| Other                                 |   |                                                                                   | 602    |   |   | 1,963 |   |
| Net                Sales              |   | $                                                                                      | 24,565 |   | $ | 15,993 |   |

*(in      thousands):*

| **Country**                  |   | **July                1, 2006** |   | **April                1, 2006** |   |
|------------------------------|--------|---------------------------------|--------|----------------------------------|--------|
| United                States |   | $                               | 7,378  |                             | $      | 7,006 |   |
| Hong                Kong     |   |                            | 1,106  |                             |   | 1,042 |   |
|                         |   | $                               | 8,484  |                             | $      | 8,048 |   |

**Note      10 - Significant Customers **

**Note      11 - Recent Accounting Pronouncements**

*“Accounting      for Uncertainty in Income Taxes - an interpretation of FASB Statement No.      109”*

----

**SUPERTEX,            INC.**

**NOTES            TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -            (CONTINUED)**

**(unaudited)**

*"The      Meaning of Other-Than-Temporary Impairment and Its Application to Certain      Investments"*

----

**Item      2. Management's Discussion and Analysis of Financial Condition and Results      of      Operations**

**Cautionary      Statement Regarding Forward Looking Statements**

*This      Annual Report on Form 10-Q 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) our belief that      we have substantial production capacity in place to handle any projected      increase in business for the next fiscal year; (2) our expectation that      quarterly R&D spending during fiscal 2007 is likely to remain at or above      the level of our first quarter of fiscal 2007; (3)*
*the      Company’s belief that it has provided adequate tax reserves to cover any      additional taxes that maybe be assessed in the IRS audit;*
*(4)      that available funds and cash generated from operations will be sufficient      to      meet our working capital and capital expenditure requirements through the end      of      fiscal 2007; (5) that we expect to spend approximately $1,335,000 for capital      acquisitions in the second quarter of fiscal year 2007; (6) our belief that      the      medical ultrasound machine market will continue to grow globally in fiscal      2007      and beyond and that we will be a key component supplier with our increasing      sales of high voltage analog switches and multiplexers, high voltage pulser      ICs,      high-speed MOSFET drivers, and discrete high voltage FETs; (7) our belief that      our sales to the Medical Electronics market will increase during fiscal 2007,      due in part to contributions of custom high voltage pulsers including those      we      plan to introduce along with ultrasound receiver blocks; and our view that      in      the Telecom market increased sales of optical to optical switches and amplifier      products due to customers ramping up their programs n volume production will      offset a decline in sales of our older legacy products. These statements are      only predictions, are not guarantees, of future performance, and are subject      to      risks, uncertainties, and other factors, some of which are beyond our control      and are difficult to predict, and could cause actual results to differ      materially from those expressed or forecasted in the forward-looking statements.      *
*These      risks and uncertainties include no material adverse changes in the demand for      our customer’s products in which the Company’s products are used; competition to      supply semiconductor devices in the markets in which the Company competes does      not increase and cause price erosion; demand materializes and increases for      recently released customer products incorporating the Company’s products; that      we have no delays in developing and releasing into production our planned new      products, that there are no unexpected manufacturing issues as production ramps      up; the demand for the Company’s products or results of its product development      change is such that it would be unwise not to decrease research and development;      that the IRS will determine that more US income was realized than the Company      claimed or that fewer expenses were allowable; and that some of the Company’s      equipment will not be unexpectedly damaged or obsoleted, thereby requiring      replacement as well as those described in " Factors Which May Affect Operating      Results" under Item 7, “Management’s Discussion and Analysis of Financial      Condition and Results of Operation” in the Company’s annual report of Form 10-K      for the fiscal year ended April 1, 2006. The information included in this Form      10-Q is provided as of the filing date with the SEC and future events or      circumstances could differ significantly from the forward-looking statements      included herein. Accordingly, the readers are cautioned not to place undue      reliance on such statements. Except as required by law, the Company undertakes      no obligation to update any forward-looking statement, as a result of new      information, future events, or otherwise.*

----

**Critical      Accounting Policies**

**Overview**

**Results      of Operations**

***Net      Sales***

|                                                 |   | **Three                Months                Ended**           |   |                                  |   |                                   |   |
|------------------------------------------------------|--------|---------------------------------------------------------------------|--------|---------------------------------------|--------|----------------------------------------|--------|
| **Net                Sales***(Dollars in thousands)* |   | **      July                1, 2006** |   |  **July                2, 2005** |   |  **April                1, 2006** |   | **Year-Over-Year                Change** |   | **Sequential                Change** |   |
| Imaging                                              |   | $                                                                   | 9,877  |                                  | $      | 5,671                                  |   | $ | 11,109 |   |   | 74 | % |   | -11 | % |
| Medical                Electronics                   |   |                                                                | 8,659  |                                  |   | 5,932                                  |   |   | 7,966 |   |   | 46 | % |   | 9 | % |
| Telecom                                              |   |                                                                | 4,419  |                                  |   | 3,174                                  |   |   | 3,678 |   |   | 39 | % |   | 20 | % |
| Other                                                |   |                                                                | 1,610  |                                  |   | 1,216                                  |   |   | 1,211 |   |   | 32 | % |   | 33 | % |
| Net                Sales                             |   | $                                                                   | 24,565 |                                  | $      | 15,993                                 |   | $ | 23,964 |   |   | 54 | % |   | 3 | % |

|                                                                |   |  **Three                Months Ended** |                            |
|---------------------------------------------------------------------|--------|---------------------------------------------|---------------------------------|
| **Markets**                                                         |   |                                        | **July                1, 2006** |  |   | **July                2****,                2005** |   |   | **April                1, 2006** |   |
| Imaging                                                             |   |                                        | 40                              | % |   | 35 | % |   | 47 | % |
| Medical                Electronics                                  |   |                                        | 35                              | % |   | 37 | % |   | 33 | % |
| Telecom                                                             |   |                                        | 18                              | % |   | 20 | % |   | 15 | % |
| Other                                                               |   |                                        | 7                               | % |   | 8 | % |   | 5 | % |
|                        Net Sales |   |                                        | 100                             | % |   | 100 | % |   | 100 | % |

----

----

*(in        thousands):*

|                                  |   |   | **Three                Months                Ended**  |   |   |                            |   |   |                             |   |
|---------------------------------------|--------|--------|------------------------------------------------------------|--------|--------|---------------------------------|--------|--------|----------------------------------|--------|
| **Net                Sales**          |   |   | **July                1, 2006**                            |   |   | **July                2, 2005** |   |   | **April                1, 2006** |   |   | **Year-Over-Year                Change** |   |   | **Sequential                Change** |   |
| United                States          |   | $      | 7,527                                                      |   | $      | 7,350                           |   | $      | 8,310                            |   |   | 2 | % |   | -9 | % |
| Europe                                |   |   | 2,419                                                      |   |   | 1,305                           |   |   | 1,938                            |   |   | 85 | % |   | 25 | % |
| Japan                                 |   |   | 1,950                                                      |   |   | 1,734                           |   |   | 1,869                            |   |   | 12 | % |   | 4 | % |
| Asia                (excluding Japan) |   |   | 12,067                                                     |   |   | 3,641                           |   |   | 11,295                           |   |   | 231 | % |   | 7 | % |
| Other                                 |   |   | 602                                                        |   |   | 1,963                           |   |   | 552                              |   |   | -69 | % |   | 10 | % |
| Net                Sales              |   | $      | 24,565                                                     |   | $      | 15,993                          |   | $      | 23,964                           |   |   | 54 | % |   | 3 | % |
|                                  |   |   |                                                       |   |   |                            |   |   |                             |   |   |   |   |   |   |   |
| Domestic                Sales         |   | $      | 7,527                                                      |   | $      | 7,350                           |   | $      | 8,310                            |   |   | 2 | % |   | -9 | % |
| International                Sales    |   |   | 17,038                                                     |   |   | 8,643                           |   |   | 15,654                           |   |   | 97 | % |   | 9 | % |
| Net                Sales              |   | $      | 24,565                                                     |   | $      | 15,993                          |   | $      | 23,964                           |   |   | 54 | % |   | 3 | % |

***Gross      Profit***

|                                                                                                  | **Three                  Months Ended** |
|-------------------------------------------------------------------------------------------------------|-----------------------------------------|
| *(Dollars                  in thousands)*                                                             | **July                  1, 2006**       |   | **July                  2, 2005** |   | **April                  1, 2006** |
| Gross                  Margin Percentage                                                              | 60%                                     |   | 57% |   | 56% |
| *Included                  in Gross Margin Percentage Above*                                          |                                    |   |   |   |
| Gross                  Margin Benefit from Sale of Previously Written Down                  Inventory | $516                                    |   | $257 |   | $306 |
| Percentage                  of Net Sales                                                              | 2%                                      |   | 2% |   | 1% |

----

***Research      and Development (R&D) Expenses***

|                                    |   | **Three                Months                Ended**  |   |   |                            |   |   |
|-----------------------------------------|--------|------------------------------------------------------------|--------|--------|---------------------------------|--------|--------|
| *(Dollars                in thousands)* |   | **July                1, 2006**                            |   |   | **July                2, 2005** |   |   | **April                1, 2006** |   | **Year-Over-Year                Change** |   | **Sequential                Change** |   |
| R&D                Expenses         |   | $                                                          | 3,949  |   |                            | $      | 2,759  |   |   | $ | 3,391 |   |   | 43 | % |   | 16 | % |
| Percentage                of Net Sales  |   |                                                       | 16     | %      |                            |   | 17     | % |   |   | 14 | % |   |   |   |   |   |   |

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

|                                    |   | **Three                Months                Ended**  |                            |   |   |                            |   |
|-----------------------------------------|--------|------------------------------------------------------------|---------------------------------|--------|--------|---------------------------------|--------|
| *(Dollars                in thousands)* |   |                                                       | **July                1, 2006** |   |   | **July                2, 2005** |   |   | **April                1, 2006** |   |   | **Year-Over-Year                Change** |   |   | **Sequential                Change** |   |
| SG&A                Expenses        |   | $                                                          | 3,803                           |   | $      | 3,188                           |   | $ | 3,668 |   |   | 19 | % |   | 4 | % |
| Percentage                of Net Sales  |   |                                                       | 15                              | %      |   | 20                              | %      |   | 15 | % |   |   |   |   |   |   |

----

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

|                                                 |   |   | **Three                Months                Ended**  |   |   |                            |   |   |                             |   |
|------------------------------------------------------|--------|--------|------------------------------------------------------------|--------|--------|---------------------------------|--------|--------|----------------------------------|--------|
| *(Dollars                in thousands)*              |   |   | **July                1, 2006**                            |   |   | **July                2, 2005** |   |   | **April                1, 2006** |   |   | **Year-Over-Year                Change** |   |   | **Sequential                Change** |   |
| Interest                Income and Other Income, Net |   | $      | 1,288                                                      |   | $      | 906                             |   | $      | 1,166                            |   |   | 42 | % |   | 10 | % |
| Percentage                of Net Sales               |   |   | 5                                                          | %      |   | 6                               | %      |   | 5                                | %      |   |   |   |   |   |   |

***Provision      for Income Taxes***

----

**Financial      Condition**

***Overview***

***Liquidity      and Capital Resources***

----

***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)    |   | $                                            | 4,566  |   | $ | 1,011 |   | $ | 1,814 |   | $ | 1,741 |   | $ | -- |   |
| Purchase                obligations (2)           |   |                                         | 9,187  |   |   | 9,153 |   |   | 34 |   |   | -- |   |   | -- |   |
| Total                contractual cash obligations |   | $                                            | 13,753 |   | $ | 10,164 |   | $ | 1,848 |   | $ | 1,741 |   | $ | -- |   |

*(1)*

*      We      lease facilities under non-cancelable lease agreements expiring at various      times      through April 2011. Rental expense net of sublease income for the three months      ended July 1, 2006, amounted to $234,000.*

*(2)*

*      To      obtain favorable pricing and resource commitment, we commit to volume purchases      from suppliers of manufacturing materials and services.*

----

**Recent      Accounting Pronouncements**

*“Accounting      for Uncertainty in Income Taxes - an interpretation of FASB Statement No.      109”*

*"The      Meaning of Other-Than-Temporary Impairment and Its Application to Certain      Investments"*

***Available      Information***

**Item      3. Quantitative and Qualitative Disclosures About Market Risk and Interest      Rate      Risk**

----

**Item      4. Controls and Procedures **

**(a)      Disclosure Controls and Procedures.**

*Disclosure      Controls and Procedures*
*.*

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

*Evaluation      of Disclosure Controls and Procedures.*

**(b)      Internal Control over Financial Reporting.**

----

**PART      II - OTHER INFORMATION**

**Item      1. Legal Proceedings **

*** ***

**Item      1A. Risk Factors**

**Item      2.**
** **
**Unregistered Sales of Equity      Securities and Use of Proceeds**

**Item      3. Defaults Upon Senior Securities**

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

**Item      5. Other Information**

**Item      6. Exhibits **

----

**SIGNATURE**

**                                            SUPERTEX, INC.**

*                                                         (Registrant)*

----

**Exhibit      31**

**Certifications      Under Rule 13a-14(a)/l5d-14(a)**

----

**Exhibit      32**

**Statement      of Chief Executive Officer and Chief Financial Officer under 18 U.S.C.§ 1350**

|   | (i) | the                quarterly report of the Company on Form 10-Q for the period ended                July 1, 2006, as filed with the Securities and Exchange Commission                (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                at the dates and for the periods                indicated. |
|--------|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

*The      material contained in this Exhibit 32 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.*

----