Document:

<PAGE>   1

                                                                   EXHIBIT 10.10

                                TRW PROPRIETARY

                     CONTRACT CHANGE NOTICE AMENDMENT NO. 5
                                       TO
                      TRW / STANFORD WAFER SUPPLY AGREEMENT
                               AGREEMENT NO. 1A551

THIS AMENDMENT ("Amendment") is made and entered into and between Stanford
Microdevices, Inc. ("Buyer") and TRW Inc., by and through its Space and
Electronics Group, a corporation organized and existing under the laws of Ohio,
having offices at Redondo Beach, California, USA ("TRW").

        WHEREAS, Buyer and TRW entered into Agreement No. 1A551 with an
effective date of August 19, 1998.

        WHEREAS, Buyer and TRW desire to amend the Agreement in order to provide
for expedited production.

NOW THEREFORE, the parties agree to amend the Agreement as follows:

Article 3, Effective Date and Term: Delete "31 December 2000" and replace with
"31 December 2001."

Article 13, Notices: Delete "Mr. Patrick J. Reynolds, Phone 310-812-7602" and
replace with "Mr. Joe A. Mathis, Phone 310-814-2228."

Article 15, Intellectual Property, Section 15.3 Marking: Delete "Mr. Patrick J.
Reynolds" and replace with "Mr. Joe A. Mathis."

Exhibit IB, Price and Minimum Quantities, as revised through Revision 4 is
deleted and replaced with Exhibit IB - Revision 5 dated November 1, 2000 (Copy
attached).

Add the following exhibit: Exhibit 1D, Time and Material (T&M) Labor Rates,
Calendar Year 2001.

The above changes constitute Contract Change Notice No.5 to the Agreement.
Except as expressly provided hereinabove all other terms and conditions of the
Agreement shall apply herein and remain in full force and effect as previously
agreed to between Buyer and TRW. In the event of any conflict between the terms
of this Amendment and those of the Agreement, the terms of this Amendment will
be deemed to have superseded those of the Agreement and exclusively will govern
the matter in question.

Buyer:                                       TRW Inc.
                                             Space and Electronics Group

By: /s/ Jerry Quinnell                       By: /s/ Wes Bush
    -------------------------------              -------------------------------
Name:   Jerry Quinnell                       Name: Wes Bush
Title: Chief Operating Officer               Title: Vice President & Deputy
       Stanford Microdevices, Inc.                  General Manager TRW Ventures
Date:                                        Date:

                                 TRW PROPRIETARY
<PAGE>   2

                                 TRW PROPRIETARY

                            EXHIBIT 1B - REVISION 5
              PRICE, MINIMUM QUANTITIES, DELIVERY SCHEDULE AND SITE
                               CALENDAR YEAR 2001

A.      PRICE

    1.  3" GaAs HBT Wafers - The provisions for the Minimum Quantity Purchase
        (MQP) price are stipulated in Paragraph "B" below.

<TABLE>
<CAPTION>
                QTY          MQP Price*          Reversion Price*
                ---          ----------          ----------------
               <S>           <C>                 <C>
               [***]           [***]                  [***]
</TABLE>

        Price quoted above strictly apply to wafers purchased within the same
calendar year.

        *  Prices for TRW & SMDI Designs are the same.

        ** TRW Design consists of Darlington Amplifiers - Part Numbers: DAMXX,
           DAPXX, PAD1;
           SDMI Design consists of Part Numbers: PAD2, SMDXX and circuits for
           the following products Stanford Microdevices SXT -- 1,2,3, SXL --
           1,2,3 and SXA -- 1,2,3.

    2.  Time & Material (T&M) Engineering Support for Failure Analysis and
        Device Troubleshooting, Mask Layouts, and related support, shall be
        billed per the hourly rates per Exhibit 1D. Material and Other Direct
        Costs (ODC) will be billed as incurred.

    3.  Accelerated Lot Option(1)

<TABLE>
<CAPTION>
                   Deliverable          Standard Process Price
                   -----------          ----------------------
                   <S>                  <C>
                      [***]                     [***]
</TABLE>

Note 1) Only one (1) order for an Accelerated lot can be accepted for processing
at any time from all Stanford Microdevices contracts.

Note 2) Accelerated lot pricing is only valid if wafers are shipped to Buyer not
later than 45 days from receipt of order or lot start, whichever is later. TRW
will deliver a minimum of [***] wafers for a [***] wafer lot start. For a lot
that is designated as Accelerated after it has already started fabrication, the
shipment date will be determined as follows; 1+(1-EV) x 45 days from the time
the lot is designated Accelerated at TRW. EV equals the Earned Value or percent
complete of the in-process lot.

Note 3) If the shipment date to Stanford Microdevices is 46 days or later (or as
defined above for a lot in process) from receipt of order or lot start, option
price shall not be charged. The option is available when ordered in conjunction
with a production lot or for a lot in process.

    4.  Non-recurring costs associated with the upgrading of masksets shall be
        the responsibility of SMDI.

*Certain information on this page has been omitted and filed separately with
 the Commission. Confidential treatment has been requested with respect to the
 omitted portions.

                                       1
<PAGE>   3

                                 TRW PROPRIETARY

                       EXHIBIT 1B - REVISION 5 (CONTINUED)
              PRICE, MINIMUM QUANTITIES, DELIVERY SCHEDULE AND SITE
                               CALENDAR YEAR 2001

B.      MINIMUM QUANTITIES DURING CALENDAR YEAR 2001

        1) The minimum purchase quantity of HBT wafers for Calendar Year 2001
shall be:

<TABLE>
<CAPTION>
                        Product              Number of Wafers
                        -------              ----------------
                        <S>                  <C>
                     3" GaAs Process              [***]
                     Wafers
</TABLE>

        If Buyer fails to purchase the minimum quantity, the price reverts to
        the reversion price of [***] per wafer. Prices are valid and purchase
        order quantities shall be measured by all orders received by TRW,
        starting 1 January 2001.

C.      SITE

        Stanford Microdevices
        522 Almanor Avenue
        Sunnyvale, CA 94086

D.      DELIVERY SCHEDULE

        Wafers will be shipped to Buyer not later than ten (10) weeks from the
        first Monday after receipt of valid order.

E.      LIFE TIME BUY OPTION

        TRW has previously agreed to provide up to [***] wafers to Buyer. As of
        31 December 2000 TRW will have shipped approximately shipped [***]
        wafers to Buyer. TRW will notify Buyer when it plans to obsolete or
        upgrade its HBT MMIC fabrications process. TRW will provide this
        notification to Buyer at least six months prior to the time that TRW
        will no longer accept orders for said Product. A delivery schedule will
        be negotiated at the time the option is exercised, prior to TRW's
        initiating performance of the option.

*Certain information on this page has been omitted and filed separately with
 the Commission. Confidential treatment has been requested with respect to the
 omitted portions.

                                       2
<PAGE>   4
                                TRW PROPRIETARY

Stanford Microdevices, Inc. Sales Agreement No. 1A551

E.    LIFE TIME BUY OPTION

      TRW has previously agreed to provide up to [***] wafers to Buyer. As of 31
      December 2000 TRW will have shipped approximately shipped [***] wafers to
      Buyer. TRW will notify Buyer when it plans to obsolete or upgrade its HBT
      MMIC fabrication process. TRW will provide this notification to Buyer at
      least six months prior to the time that TRW will no longer accept orders
      for said Product. A delivery schedule will be negotiated at the time the
      option is exercised, prior to TRW's initiating performance of the option.

*Certain information on this page has been omitted and filed separately with
 the Commission. Confidential treatment has been requested with respect to the
 omitted portions.

                                       3
<PAGE>   5
                                TRW PROPRIETARY

Stanford Microdevices, Inc. Sales Agreement No. 1A551
                                                      Amendment No. 5/Revision 5

                                   EXHIBIT 1D
                      TIME AND MATERIAL (T&M) LABOR RATES
                               CALENDAR YEAR 2001

<TABLE>
<CAPTION>
ACCT. CODE        LABOR CATEGORY                HOURLY RATES
----------        --------------                ------------
<S>               <C>                           <C>
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
[***]             [***]                            [***]
</TABLE>

Notes: 1) [***]
       2) [***]

*Certain information on this page has been omitted and filed separately with
 the Commission. Confidential treatment has been requested with respect to the
 omitted portions.

                                       4EXHIBIT 10.18
-------------

         ============================================================

                                FIRST AMENDMENT

                                      to

                          PURCHASE AND SALE AGREEMENT

                                      and

                               ESCROW AGREEMENT

                                 by and among

                          The Sellers Defined Herein,

                         Banyan Strategic Realty Trust

                                      and

                        Denholtz Management Corporation

                             Dated  March 28, 2001

         ============================================================

<PAGE>

                FIRST AMENDMENT TO PURCHASE AND SALE AGREEMENT
                             AND ESCROW AGREEMENT

      This First Amendment to Purchase and Sale Agreement and Escrow
Agreement made this 28th day of March, 2001 by and among BSRT University
Square L.L.C., an Illinois limited liability company, BSRT Woodcrest Office
Park Limited Partnership, an Illinois limited partnership, BSRT Commerce
Center L.L.C., an Illinois limited liability company, BSRT Avalon Ridge
L.L.C., an Illinois limited liability company, BSRT Technology Park (GA)
L.L.C., an Illinois limited liability company, BSRT Johns Creek L.L.C., an
Illinois limited liability company, BSRT/M&J Northlake Limited Partnership,
an Illinois limited partnership, BSRT Technology Center L.L.C., an Illinois
limited liability company, BSRT Fountain Square L.L.C., an Illinois limited
liability company, BSRT University Corporation Center L.L.C., an Illinois
limited liability company, BSRT Metric Plaza L.L.C., an Illinois limited
liability company, BSRT Park Center L.L.C., an Illinois limited liability
company, BSRT Sand Lake Tech Center L.L.C., an Illinois limited liability
company, BSRT Peachtree Pointe L.L.C., an Illinois limited liability
company, BSRT Phoenix Business Park L.L.C., an Illinois limited liability
company, BSRT Southlake L.L.C., an Illinois limited liability company, BSRT
Avalon Center L.L.C., an Illinois limited liability company, BSRT Airways
Plaza L.L.C., an Illinois limited liability company, BSRT Newtown Trust, a
Massachusetts business trust, BSRT Lexington Trust, a Massachusetts
business trust, BSRT Lexington B Corp., an Illinois corporation,
Banyan/Morgan MOC Limited Partnership, an Illinois limited partnership,
Banyan/Morgan Willowbrook Limited Partnership, an Illinois limited
partnership, Banyan/Morgan Elmhurst L.L.C., an Illinois limited liability
company, Banyan/Morgan Wisconsin L.L.C., an Illinois limited liability
company,  BSRT Riverport Trust, a Massachusetts business trust, BSRT
Butterfield Office Plaza L.L.C., an Illinois limited liability company, and
Tower Lane Limited Partnership, an Illinois limited partnership, each
having an address of c/o Banyan Strategic Realty Trust, 150 South Wacker
Drive, Suite 2900, Chicago, Illinois 60606 (hereinafter individually
referred to as a "Seller" and collectively referred to as the "Sellers"),
Banyan Strategic Realty Trust, a Massachusetts business trust having an
address at 150 South Wacker Drive, Suite 2900, Chicago, Illinois 60606
(hereinafter referred to as "BSRT") and Denholtz Management Corporation, a
New Jersey corporation, having an address of c/o Denholtz Associates, 1600
St. Georges Avenue, Rahway, New Jersey 07065, its assignees or nominees
(hereinafter referred to as "Buyer").

      Sellers, BSRT and Buyer executed and delivered (i) a Purchase and
Sale Agreement dated January 8, 2001 (the "Contract") for the purchase and
sale of thirty (30) Properties as defined in the Contract; and (ii) an
Escrow Agreement (to which Commonwealth Land Title Insurance Company
("Escrowee") is also a party) dated January 8, 2001 (the "Escrow
Agreement"); and

      Sellers, BSRT, Buyer and Escrowee desire to amend the Contract and
the Escrow Agreement on the terms and conditions hereof; and

      Capitalized terms used but not defined herein shall have the same
meanings as ascribed to such terms in the Contract and the Escrow
Agreement.

                                       1

<PAGE>

      Now, therefore, the parties hereto, in consideration of the mutual
covenants herein contained, and respectively expressing the intention to be
legally bound hereby, covenant and agree as follows:

      1.    AMENDMENT.

            a.    SECTION 3.3 - Section 3.3 of the Contract is deleted in
its entirety, and the following is inserted in its place:

                  "If, on or before April 9, 2001, Buyer shall
give written notice to Sellers that Buyer is dissatisfied with the result
of Buyer's investigation with respect to the Properties or the operation
thereof, for any reason, then this Agreement shall thereupon terminate, and
except as otherwise provided herein, neither Sellers nor Buyer shall have
any further liability or obligation to the other hereunder, but Buyer shall
be entitled to a return of a portion of the Downpayment equal to $1,250,000
(plus all interest on the Downpayment) and BSRT shall be entitled to a
portion of the Downpayment equal to $250,000. The earlier to occur of (a)
the date Buyer waives in writing its right pursuant to this Section 3.3, or
(b) April 9, 2001 (assuming Buyer does not exercise its option pursuant to
this Section 3.3) shall be hereinafter referred to as the "Due Diligence
Date." Buyer shall be responsible for all expenses incurred by Buyer in
connection with its investigation of the Properties except as set forth in
Sections 5.5, 18.5 and 19.2 hereof. Prior to the Due Diligence Date, if
Buyer has not terminated this Agreement, Buyer shall notify Sellers which
Properties Buyer intends to acquire subject to the applicable Existing
Indebtedness."

             b.   ESCROW AGREEMENT - The first sentence in paragraph 4 of
the Escrow Agreement is hereby deleted and the following is inserted in its
place:

                  "If the Purchase Agreement is terminated in
accordance with Section 3.3 thereof, $250,000 of the Downpayment shall be
paid to BSRT and the remainder (and all interest earned thereon) shall be
paid to Buyer."

      2.    BOARD OF TRUSTEES APPROVAL.  BSRT hereby represents and
warrants that its Board of Trustees has approved this First Amendment on
March 28, 2001.

      3.    REAFFIRMATION.  In all other respects, Sellers, BSRT, Buyer and
Escrowee reaffirm, readopt and ratify the Contract and the Escrow
Agreement.

                                       2

<PAGE>

      IN WITNESS WHEREOF, the parties have executed this First Amendment as
of the date first above written.

                         BUYER:

                         Denholtz Management Corporation

                         By:
                               ------------------------------
                         Name:
                               ------------------------------
                         Title:
                               ------------------------------

                         BSRT:

                         BANYAN STRATEGIC REALTY TRUST

                         By:
                               ------------------------------
                         Name:
                               ------------------------------
                         Title:
                               ------------------------------

                         SELLERS:

                         ALL SELLERS AS DEFINED ABOVE

                         By:
                               ------------------------------
                         Name:
                               ------------------------------
                         Title:
                               ------------------------------
                               Of each of the Sellers and on
                               behalf of each of the Sellers

                         ESCROWEE:

                         COMMONWEALTH LAND TITLE INSURANCE
                         COMPANY

                         By:
                               ------------------------------
                         Name:
                               ------------------------------
                         Title:
                               ------------------------------

                                       3

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