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 ----------------------------- ----------------------------- -------------------------------------------------------------------------------- 1) Names of Reporting Person 1981 Kara Ann Berg Trust, Clyde J. Berg, Trustee -------------------------------------------------------------------------------- 2) Check the Appropriate Box if a Member of a Group (See Instructions) (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3) SEC Use Only -------------------------------------------------------------------------------- 4) Citizenship or Place of Organization California -------------------------------------------------------------------------------- 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