CUSIP No. 827057 10 0

Page 2 of 9 Pages

Names of Reporting Persons:

    Bing Yeh

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)  x        (b)  ¨

SEC Use Only:

Source of Funds (See Instructions):

    PF, OO

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):                                      ¨

Citizenship or Place of Organization:

    United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power:

    276,876

Shared Voting Power:

    10,618,000

Sole Dispositive Power:

    276,876

Shared Dispositive Power:

    10,618,000

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:

    10,894,876*

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):                                ¨

13.

Percent of Class Represented by Amount in Row (11)

    11.3%**

14.

Type of Reporting Person (See Instructions):

    IN

CUSIP No. 827057 10 0

Page 3 of 9 Pages

Names of Reporting Persons:

    Deborah Yeon-May Yeh

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)  x        (b)  ¨

SEC Use Only:

Source of Funds (See Instructions):

    PF, OO

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):                                      ¨

Citizenship or Place of Organization:

    United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power:

    0

Shared Voting Power:

    10,618,000

Sole Dispositive Power:

    0

Shared Dispositive Power:

    10,618,000

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:

    10,618,000*

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):                              ¨

13.

Percent of Class Represented by Amount in Row (11):

    11.1%**

14.

Type of Reporting Person (See Instructions):

    IN

CUSIP No. 827057 10 0

Page 4 of 9 Pages

Names of Reporting Persons:

    Golden Eagle Capital L.P.

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)  x        (b)  ¨

SEC Use Only:

Source of Funds (See Instructions):

    PF, OO

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):                                      ¨

Citizenship or Place of Organization:

    California

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power:

    0

Shared Voting Power:

    7,579,837

Sole Dispositive Power:

    0

Shared Dispositive Power:

    7,579,837

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:

    7,579,837*

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):                              ¨

13.

Percent of Class Represented by Amount in Row (11):

    7.9%**

14.

Type of Reporting Person (See Instructions):

    PN

CUSIP No. 827057 10 0

Page 5 of 9 Pages

Names of Reporting Persons:

    Yeh Family Trust U/T/D dated August 14, 1995

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)  x        (b)  ¨

SEC Use Only:

Source of Funds (See Instructions):

    PF, OO

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):                                      ¨

Citizenship or Place of Organization:

    California

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power:

    0

Shared Voting Power:

    3,038,163

Sole Dispositive Power:

    0

Shared Dispositive Power:

    3,038,163

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:

    3,038,163*

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):                                      ¨

13.

Percent of Class Represented by Amount in Row (11):

    3.2%**

14.

Type of Reporting Person (See Instructions):

    OO

CUSIP No. 827057 10 0

Page 6 of 9 Pages

Names of Reporting Persons:

    Yaw Wen Hu

Check the Appropriate Box if a Member of a Group (See Instructions):

(a)  ¨        (b)  ¨

SEC Use Only:

Source of Funds (See Instructions):

    PF, OO

Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e):                                      ¨

Citizenship or Place of Organization:

    United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With

Sole Voting Power:

    1,220,801

Shared Voting Power:

    0

Sole Dispositive Power:

    1,220,801

Shared Dispositive Power:

    0

11.

Aggregate Amount Beneficially Owned by Each Reporting Person:

    1,220,801

12.

Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions):                              ¨

    ¨

13.

Percent of Class Represented by Amount in Row (11):

    1.3%*

14.

Type of Reporting Person (See Instructions):

    IN

Item 2 of the Schedule 13D is amended and supplemented by adding thereto the following:

As of February 2, 2010, Mr. Yeh and Mr. Hu may no longer be deemed a “group” within the meaning of Section 13(d)(3) of the Exchange Act. Effective immediately after the filing of this Amendment No. 1, Mr. Hu shall cease to be a joint filer and Reporting Person on this Schedule 13D. Except as expressly set forth in this Schedule 13D, each Reporting Person disclaims beneficial ownership of the shares of Common Stock beneficially owned by any other Reporting Person.

Item 4 of the Schedule 13D is hereby amended and supplemented by adding thereto the following:

On February 2, 2010, the Issuer entered into an Agreement and Plan of Merger (the “Subsequent Merger Agreement”), with Microchip Technology Incorporated, a Delaware corporation, and Sun Acquisition Corporation, a California corporation and a wholly owned subsidiary of Parent (“Merger Sub”), pursuant which, and upon the terms and subject to the conditions thereof, Merger Sub will be merged with and into the Issuer and each outstanding share of Common Stock (other than shares as to which dissenters’ rights have been properly exercised) will be converted into the right to receive $2.85, without interest. Also on February 2, 2010 and prior to entering into the Subsequent Merger Agreement, the Issuer terminated the Merger Agreement. Pursuant to their terms, the Contribution Agreement and the Voting Agreement terminated automatically upon termination of the Merger Agreement.

Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows:

(a)-(b) Each of Mr. Yeh and Mrs. Yeh has shared power to direct the vote or disposition of 10,618,000 shares of Common Stock, of which 3,038,163 shares are held by the Trust and 7,579,837 shares are held by the Partnership. Mr. Yeh has sole power to direct the vote or disposition of 90,000 shares of Common Stock held by him in an IRA account and 186,876 shares of Common Stock that are subject to options held by him that are exercisable within 60 days of February 2, 2010. Accordingly, the respective percentages of shares of Common Stock beneficially owned by Mr. Yeh and Mrs. Yeh, respectively, are approximately 11.3%¹ and approximately 11.1%² of the class.

The Trust and Partnership have no power to direct the vote or disposition of any of the shares, but as members of a group with Mr. Yeh and Mrs. Yeh, each is deemed to beneficially own and share voting and dispositive power over the shares of the Common Stock beneficially owned by Mr. Yeh and Mrs. Yeh.

Dr. Hu has the sole power to direct the vote or disposition of all 1,220,801 shares of Common Stock held by him, including the 324,623 shares of Common Stock that are subject to options that are exercisable within 60 days of February 2, 2010. Accordingly, the percentage of shares of Common Stock beneficially owned by Dr. Hu is approximately 1.3%³ of the class.

Except as expressly set forth in this Schedule, each Reporting Person disclaims beneficial ownership of the shares of Common Stock beneficially owned by any other Reporting Person.

Item 6 of the Schedule 13D is hereby amended and supplemented by adding thereto the following:

The Contribution Agreement and the Voting Agreement have terminated. See Item 4 herein.

Based upon 96,041,033 shares of Common Stock outstanding, consisting of 95,854,157 shares of Common Stock outstanding as of October 31, 2009, as reported in the Issuer’s Form 10-Q filed with the SEC on November 9, 2009, plus 186,876 shares of Common Stock that are subject to options held by Mr. Yeh that are exercisable within 60 days of February 2, 2010.

Based upon 95,854,157 shares of Common Stock outstanding as of October 31, 2009, as reported in the Issuer’s Form 10-Q filed with the SEC on November 9, 2009.

Based upon 96,178,780 shares of Common Stock outstanding, consisting of 95,854,157 shares of Common Stock outstanding as of October 31, 2009, as reported in the Issuer’s Form 10-Q filed with the SEC on November 9, 2009, plus 324,623 shares of Common Stock that are subject to options held by Dr. Hu that are exercisable within 60 days of February 2, 2010.