Document:

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                                                               Exhibit 4.1

                            CERTIFICATE OF AMENDMENT

                                       OF

                          CERTIFICATE OF INCORPORATION

                                       OF

                           ELANTEC SEMICONDUCTOR, INC.

         Elantec Semiconductor, Inc., a Delaware corporation, does hereby
certify that the following amendment to the corporation's Certificate of
Incorporation has been duly adopted in accordance with the provisions of
Section 242 of the Delaware General Corporation Law, with the approval of
such amendment by the corporation's stockholders:

         Article IV, Paragraph A of the Certificate of Incorporation,
relating to authorization of shares is amended to read in its entirety as
follows:

         "A.    AUTHORIZATION OF SHARES.

         The corporation has authority to issue Fifty-Five Million
(55,000,000) shares, consisting of two classes: Fifty Million (50,000,000)
shares of Common Stock, par value $0.01 per share; and Five Million
(5,000,000) shares of Preferred Stock, par value $0.01 per share."

         IN WITNESS WHEREOF, said corporation has caused this Certificate of
Amendment to be signed by its duly authorized officer this 7th day of April
2000 and the foregoing facts stated herein are true and correct.

                                  ELANTEC SEMICONDUCTOR, INC.

                                  By:           /s/ Ephraim Kwok
                                     -------------------------------------------
                                       Ephraim Kwok, Chief Financial Officer<PAGE>

                                                                   Exhibit 10.1

NABISCO
GROUP HOLDINGS                                                     NABISCO LOGO
LOGO

                                               June 28, 2000

To:  Nabisco Group Holdings Corp. ("NGH") and
     Nabisco Holdings Corp. ("NA")
     Stock Optionee

Dear Optionee:

     This represents our agreement and understanding as follows:

     1. We confirm that the sections of the Stock Option Agreements for 1999
and 2000 between you and NA and/or NGH, as the case may be, have each been
amended by the memorandum dated June 14, 2000 from C. Michael Sayeau to
Nabisco Group Holdings Corp. and Nabisco Holdings Corp. Optionees entitled
"Amendment to Option Agreements" (the "Option Memorandum").

    2. We confirm that the provisions contained in the Option Memorandum
supersede in full Section 13 of each of the Stock Option Agreements that were
entered into in 1999, as previously contained in those Stock Option
Agreements, and supersede in full Section 12 of each of the Stock Option
Agreements that were entered into in 2000, as previously contained in those
Stock Option Agreements.

    Please sign both copies of this letter below to confirm our agreement and
understanding with regard to the foregoing amendment. You should return one
signed copy to Phyllis Hartmann, Executive Compensation -- EH-02SE, in the
enclosed envelope and retain one copy for your files.

Optionee Acknowledgment:                 Very truly yours,

                                         NABISCO GROUP HOLDINGS CORP.
                                         NABISCO HOLDINGS CORP.
-------------------------------------
           [Signature]

                                         /s/ James Kirkman
-------------------------------------
          [Print Name]

Optionee's Social Security Number:       James A. Kirkman III
                                         Senior Vice President,
-------------------------------------    General Counsel & Secretary and
                                         Executive Vice President,
Optionee's Home Address:                 General Counsel &
                                         Secretary, respectively
-------------------------------------

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

             7 CAMPUS DRIVE P.O. BOX 311, PARSIPPANY, NJ 07054-0311
                    (973) 682-7700 Fax: (973) 539-9150

<PAGE>

                      AMENDMENT TO OPTION AGREEMENTS
                      ------------------------------

Non-Competition
---------------

Provided that the Optionee is not party to a written employment or
termination agreement with the Company containing restrictions on Optionee's
eligibility to compete with the Company following Optionee's Termination of
Employment, whether or not any such agreement applies to all Terminations of
Employment, in consideration for the Option, Optionee agrees that:

    (a)  For the twelve (12) month period commencing on the date of
         Optionee's Termination of Employment, Optionee shall not engage in
         Competitive Employment. As used herein, "Competitive Employment"
         means providing any person, company or other entity with any
         services, whether as a consultant, employee, investor or otherwise,
         regarding any business, product, service or other matter which: (i)
         is substantially similar to or competes with any business, product,
         service or other matter regarding which Optionee worked for the
         Company, or any of its affiliates, during the two (2) years prior to
         Optionee's Termination of Employment; or (ii) concerns subject
         matters about which Optionee gained proprietary information of the
         Company, or its affiliates, during the two (2) year period prior to
         Optionee's Termination of Employment.

    (b)  If the Company reasonably determines that Optionee has materially
         violated any of Optionee's obligations under subparagraph (a),
         above, then, in addition to any other remedies at law or in equity
         it may have: (i) the Company shall have the right to cease payment
         of any compensation, salary contribution, benefits, perquisites and
         any other remuneration which is due or may become due Optionee under
         any employment, salary continuation or similar agreement between the
         Company, or any of its affiliates, and Optionee; and (ii) all past,
         present and future stock option grants awarded Optionee under the
         Plan, including grants which according to their terms are vested,
         shall terminate, effective the date on which such violation began
         (the "Violation Date"). The Company may demand the return of any
         gain realized by Optionee from the exercise of any such grants by
         Optionee at any time on or after the date sixty (60) days prior to
         the Violation Date. If after such demand Optionee fails to return
         said amounts, Optionee acknowledges that the Company has the right
         to offset against said amounts any amounts, including compensation,
         owed Optionee by the Company or to commence judicial proceedings
         against Optionee to recover said amounts and any attorneys' fees and
         costs.

    (c)  Optionee acknowledges and agrees that: (1) the restrictions
         contained in Section 13 (1999) and/or Section 12 (2000) are
         necessary to protect the legitimate interests of the Company and
         impose no undue hardship on Optionee; (ii) the violation or
         threatened violation of Section 13 (1999) and/or Section 12 (2000)
         will result in irreparable injury to the Company and Optionee
         consents to the issuance of any restraining order, preliminary
         restraining order or injunction, without bond, which arises from
         conduct by Optionee in violation of Section 13 (1999) and/or Section
         12 (2000), and the existence of any claim Optionee may have against
         the Company will not constitute a defense thereto; (iii) if the
         Company prevails in any suit or proceeding to enforce its rights
         under Section 13 (1999) and/or Section 12 (2000), Optionee shall
         indemnify the Company for all expenses incurred by the Company,
         including reasonable attorneys' fees; and (iv) no one employed by or
         representing the Company has any authority to make oral statements
         which modify, waive or discharge in any manner any provision of
         Section 13 (1999) and/or Section 12 (2000).

         Nothing herein to the contrary, the foregoing provisions of Section
         13 (1999) and/or Section 12 (2000) shall not apply to any
         Termination of Employment during the two-year period beginning on
         the date of a Change of Control.<PAGE>

                                                                   Exhibit 10.2

NABISCO
GROUP HOLDINGS                                                     NABISCO LOGO
LOGO

                                               June 28, 2000

To:  Nabisco Group Holdings Corp. ("NGH") and
     Nabisco Holdings Corp. ("NA")
     Restricted Stock Unit Grantee

Dear Grantee:

     This represents our agreement and understanding as follows:

     1. We confirm that the section of the Restricted Stock Unit Agreements
for 1999 and 2000 between you and NA and/or NGH, as the case may be, have
each been amended by the memorandum dated June 14, 2000 from C. Michael
Sayeau to Nabisco Group Holdings Corp. and Nabisco Holdings Corp. Restricted
Stock Unit Holders entitled "Amendment to Restricted Stock Unit Agreements"
(the "Restricted Stock Unit Memorandum").

    2. We confirm that the provisions contained in the Restricted Stock Unit
Memorandum supersede in full Section 14 of the 1999 and 2000 NHC RSU
Agreements and Section 18 of the NGH 2000 RSU Agreement, as previously
contained in those Restricted Stock Unit Agreements.

    Please sign both copies of this letter below to confirm our agreement and
understanding with regard to the foregoing amendment. You should return one
signed copy to Phyllis Hartmann, Executive Compensation -- EH-02SE, in the
enclosed envelope and retain one copy for your files.

Grantee Acknowledgment:                  Very truly yours,

                                         NABISCO GROUP HOLDINGS CORP.
                                         NABISCO HOLDINGS CORP.
-------------------------------------
           [Signature]

                                         /s/ James Kirkman
-------------------------------------
          [Print Name]

Grantee's Social Security Number:        James A. Kirkman III
                                         Senior Vice President,
-------------------------------------    General Counsel & Secretary and
                                         Executive Vice President,
Grantee's Home Address:                  General Counsel &
                                         Secretary, respectively
-------------------------------------

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

             7 CAMPUS DRIVE P.O. BOX 311, PARSIPPANY, NJ 07054-0311
                    (973) 682-7700 Fax: (973) 539-9150

<PAGE>

                  AMENDMENT TO RESTRICTED STOCK UNIT AGREEMENTS
                  ---------------------------------------------

Non-Competition
---------------

Provided that the Grantee is not party to a written employment or
termination agreement with the Company containing restrictions on Grantee's
eligibility to compete with the Company following Grantee's Termination of
Employment, whether or not any such agreement applies to all Terminations of
Employment, in consideration for the grant, Grantee agrees that:

    (a)  For the twelve (12) month period commencing on the date of
         Grantee's Termination of Employment, Grantee shall not engage in
         Competitive Employment. As used herein, "Competitive Employment"
         means providing any person, company or other entity with any
         services, whether as a consultant, employee, investor or otherwise,
         regarding any business, product, service or other matter which: (i)
         is substantially similar to or competes with any business, product,
         service or other matter regarding which Grantee worked for the
         Company, or any of its affiliates, during the two (2) years prior to
         Grantee's Termination of Employment; or (ii) concerns subject
         matters about which Grantee gained proprietary information of the
         Company, or its affiliates, during the two (2) year period prior to
         Grantee's Termination of Employment.

    (b)  If the Company reasonably determines that Grantee has materially
         violated any of Grantee's obligations under subparagraph (a),
         above, then, in addition to any other remedies at law or in equity
         it may have: (i) the Company shall have the right to cease payment
         of any compensation, salary contribution, benefits, perquisites and
         any other remuneration which is due or may become due Grantee under
         any employment, salary continuation or similar agreement between the
         Company, or any of its affiliates, and Grantee; and (ii) all past,
         present and future stock option grants awarded Grantee under the
         Plan, including grants which according to their terms are vested,
         shall terminate, effective the date on which such violation began
         (the "Violation Date"). The Company may demand the return of any
         gain realized by Grantee from the exercise of any such grants by
         Grantee at any time on or after the date sixty (60) days prior to
         the Violation Date. If after such demand Grantee fails to return
         said amounts, Grantee acknowledges that the Company has the right
         to offset against said amounts any amounts, including compensation,
         owed Grantee by the Company or to commence judicial proceedings
         against Grantee to recover said amounts and any attorneys' fees and
         costs.

    (c)  Grantee acknowledges and agrees that: (i) the restrictions contained
         herein are necessary to protect the legitimate interests of the
         Company and impose no undue hardship on Grantee; (ii) the violation
         or threatened violation of this Section will result in irreparable
         injury to the Company and Grantee consents to the issuance of any
         restraining order, preliminary restraining order or injunction,
         without bond, which arises from conduct by Grantee in violation
         hereof, and the existence of any claim Grantee may have against the
         Company will not constitute a defense thereto; (iii) if the Company
         prevails in any suit or proceeding to enforce its rights hereunder,
         Grantee shall indemnify the Company for all expenses incurred by the
         Company, including reasonable attorneys' fees; and (iv) no one
         employed by or representing the Company has any authority to make
         oral statements which modify, waive or discharge in any manner any
         provision of this Section.

         Nothing herein to the contrary, the foregoing provisions of this
         Section shall not apply to any Termination of Employment during the
         two-year period beginning on the date of a Change of Control.

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