SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                       Monolithic System Technology, Inc.
                       -----------------------------------
                                (Name of Issuer)


                          Common Stock, $0.01 par value
                          -----------------------------
                         (Title of Class of Securities)


                                   609842 10 9
                                  ------------
                                 (CUSIP Number)


                                December 31, 2002
                               ------------------
             (Date of Event Which Requires Filing of this Statement)

     Check the  appropriate  box to  designate  the rule  pursuant to which this
Schedule is filed:

       [  ]  Rule 13d-1(b)

       [  ]  Rule 13d-1(c)

       [X]   Rule 13d-1(d)

     * The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act, but shall be subject to all other provisions of the Act (however, see
the Notes).






-----------------------------                      -----------------------------

CUSIP No. 609842 10 9                 13G              Page 2 of 4 Pages
-----------------------------                      -----------------------------





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     1)   Names of Reporting Person
          1981 Kara Ann Berg Trust, Clyde J. Berg, Trustee
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     2)   Check the Appropriate Box if a Member of a Group (See Instructions)
           (a) [ ]
           (b) [ ]
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     3)   SEC Use Only

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     4)   Citizenship or Place of Organization
          California
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     Number of Shares       5) Sole Voting Power  2,304,830
                          ------------------------------------------------------
    Beneficially Owned      6) Shared Voting Power  0
                          ------------------------------------------------------
    by Each Reporting       7) Sole Dispositive Power  2,304,830
                          ------------------------------------------------------
       Person with:         8) Shared Dispositive Power  0
--------------------------------------------------------------------------------
     9)   Aggregate Amount Beneficially Owned by Each Reporting Person
          2,304,830
--------------------------------------------------------------------------------
    10)   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
          [ ] Not applicable.  (See Instructions)
--------------------------------------------------------------------------------
    11)   Percent of Class Represented by Amount in Row (9)
          7.6%
--------------------------------------------------------------------------------
    12)   Type of Reporting Person (See Instructions)
          OO
--------------------------------------------------------------------------------


ITEM 1.    (a)  The name of the issuer is Monolithic System Technology, Inc.
                (the "Company").

           (b)  The principal executive offices of the Company are located at
                1020 Stewart Drive, Sunnyvale, California 94085.

ITEM 2.    (a)  The name of the filing person is 1981 Kara Ann Berg Trust,
                Clyde J. Berg, Trustee ("Trust").

           (b)  The business address for Trust is 10050 Bandley Drive,
                Cupertino, California 94014.

           (c)  Trust is organized under the laws of the state of California.

           (d)  The title of the class of securities is Common Stock.

           (e)  The CUSIP number of the Common Stock is 609842 10 9.



ITEM 3.    IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR
           (C), CHECK WHETHER THE PERSON FILING IS A:

           This statement is being filed pursuant to 13d-1(d).

ITEM 4.    OWNERSHIP.

           According to the Company's Quarterly Report on Form 10-Q filed on
           November 14, 2002, there are 30,200,820 shares of Common Stock issued
           and outstanding as of November 7, 2002.

           CLYDE J. BERG, SOLE TRUSTEE OF 1981 KARA ANN BERG TRUST

           The following information relates to shares of Common Stock for which
           Clyde J. Berg holds voting or dispositive authority.

           (a) Number of shares beneficially owned: 2,304,830

           (b) Percent of class: 7.6%

           (c) Number of shares as to which such person has:

               (i)   Sole power to vote or to direct the vote: 2,304,830

               (ii)  Shared power to vote or to direct the vote: 0

               (iii) Sole power to dispose or to direct the disposition of:
                     2,304,830

               (iv)  Shared power to dispose or to direct the disposition of: 0

               Clyde J. Berg has sole voting and dispositive authority as sole
               trustee over 2,304,830 shares held by Trust.

               Clyde J. Berg disclaims beneficial ownership of the 2,304,830
               shares held by Trust.

ITEM 5.    OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

           Not applicable.

ITEM 6.    OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

           See responses in Item 4 above.

ITEM 7.    IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
           THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR
           CONTROL PERSON.

           Not applicable.




ITEM 8.    IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

           Not applicable.

ITEM 9.    NOTICE OF DISSOLUTION OF GROUP.

           Not applicable.

ITEM 10.   CERTIFICATION.

           Not applicable.

                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Date:  February 14, 2003


                                       /s/ Clyde J. Berg
                               ------------------------------------
                                           Clyde J. Berg
                               Signing as sole trustee of 1981 Kara Ann Berg
                               Trust