<PAGE>   1

                                                                     Exhibit 3.1


                           AMENDED AND RESTATED BYLAWS

                                       OF

                          ASPECT MEDICAL SYSTEMS, INC.
<PAGE>   2
                           AMENDED AND RESTATED BYLAWS

                                TABLE OF CONTENTS



<TABLE>
<S>                                                                                        <C>
ARTICLE 1 - Stockholders.....................................................................    1
         1.1      Place of Meetings..........................................................    1
         1.2      Annual Meeting.............................................................    1
         1.3      Special Meetings...........................................................    1
         1.4      Notice of Meetings.........................................................    1
         1.5      Voting List................................................................    2
         1.6      Quorum.....................................................................    2
         1.7      Adjournments...............................................................    2
         1.8      Voting and Proxies.........................................................    2
         1.9      Action at Meeting..........................................................    3
         1.10     Nomination of Directors....................................................    3
         1.11     Notice of Business at Annual Meetings......................................    4
         1.12     Action without Meeting.....................................................    5
         1.13     Organization...............................................................    5

ARTICLE 2 - Directors........................................................................    5
         2.1      General Powers.............................................................    5
         2.2      Number; Election and Qualification.........................................    5
         2.3      Classes of Directors.......................................................    5
         2.4      Terms of Office............................................................    5
         2.5      Allocation of Directors Among Classes in the Event of Increases or
                  Decreases in the Number of Directors.......................................    6
         2.6      Vacancies..................................................................    6
         2.7      Resignation................................................................    6
         2.8      Regular Meetings...........................................................    6
         2.9      Special Meetings...........................................................    6
         2.10     Notice of Special Meetings.................................................    6
         2.11     Meetings by Conference Communications Equipment............................    7
         2.12     Quorum.....................................................................    7
         2.13     Action at Meeting..........................................................    7
         2.14     Action by Consent..........................................................    7
         2.15     Removal....................................................................    7
         2.16     Committees.................................................................    7
         2.17     Compensation of Directors..................................................    8

ARTICLE 3 - Officers.........................................................................    8
         3.1      Enumeration................................................................    8
         3.2      Election...................................................................    8
         3.3      Qualification..............................................................    8
         3.4      Tenure.....................................................................    8
         3.5      Resignation and Removal....................................................    8
</TABLE>

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<TABLE>
<S>                                                                                        <C>
         3.6      Vacancies..................................................................    8
         3.7      Chairman of the Board and Vice Chairman of the Board.......................    9
         3.8      President..................................................................    9
         3.9      Vice Presidents............................................................    9
         3.10     Secretary and Assistant Secretaries........................................    9
         3.11     Treasurer and Assistant Treasurers........................................    10
         3.12     Salaries..................................................................    10

ARTICLE 4 - Capital Stock...................................................................    10
         4.1      Issuance of Stock.........................................................    10
         4.2      Certificates of Stock.....................................................    10
         4.3      Transfers.................................................................    10
         4.4      Lost, Stolen or Destroyed Certificates....................................    11
         4.5      Record Date...............................................................    11

ARTICLE 5 - General Provisions..............................................................    11
         5.1      Fiscal Year...............................................................    11
         5.2      Corporate Seal............................................................    11
         5.3      Waiver of Notice..........................................................    11
         5.4      Voting of Securities......................................................    12
         5.5      Evidence of Authority.....................................................    12
         5.6      Certificate of Incorporation..............................................    12
         5.7      Transactions with Interested Parties......................................    12
         5.8      Severability..............................................................    13
         5.9      Pronouns..................................................................    13

ARTICLE 6 - Amendments......................................................................    13
         6.1      By the Board of Directors.................................................    13
         6.2      By the Stockholders.......................................................    13
         6.3      Certain Provisions........................................................    13
</TABLE>

                                     - ii -
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                              AMENDED AND RESTATED

                                     BY-LAWS

                                       OF

                          ASPECT MEDICAL SYSTEMS, INC.


                            ARTICLE 1 - Stockholders

         1.1 Place of Meetings. All meetings of stockholders shall be held at
such place as may be designated from time to time by the Board of Directors, the
Chairman of the Board or the President or, if not so designated, at the
principal office of the corporation. The Board of Directors may, in its sole
discretion, determine that a meeting shall not be held at any place, but may
instead be held solely by means of remote communication in a manner consistent
with the Delaware General Corporation Law.

         1.2 Annual Meeting. The annual meeting of stockholders for the election
of directors and for the transaction of such other business as may properly be
brought before the meeting shall be held on a date and at a time designated by
the Board of Directors, the Chairman of the Board or the President (which date
shall not be a legal holiday in the place where the meeting is to be held). If
no annual meeting is held in accordance with the foregoing provision, a special
meeting may be held in lieu of the annual meeting, and any action taken at that
special meeting shall have the same effect as if it had been taken at the annual
meeting, and in such case all references in these By-Laws to the annual meeting
of the stockholders shall be deemed to refer to such special meeting.

         1.3 Special Meetings. Special meetings of stockholders may be called at
any time only by the Chairman of the Board of Directors, the Chief Executive
Officer (or if there is no Chief Executive Officer, the President) or the Board
of Directors. Business transacted at any special meeting of stockholders shall
be limited to matters relating to the purpose or purposes stated in the notice
of meeting.

         1.4 Notice of Meetings. Except as otherwise provided by law, written
notice of each meeting of stockholders, whether annual or special, shall be
given not less than ten nor more than 60 days before the date of the meeting to
each stockholder entitled to vote at such meeting. Without limiting the manner
by which notice otherwise may be given to stockholders, any notice shall be
effective if given by a form of electronic transmission consented to (in a
manner consistent with the Delaware General Corporation Law) by the stockholder
to whom notice is given. The notices of all meetings shall state the place, if
any, date and time of the meeting and the means of remote communications, if
any, by which stockholders and proxyholders may be deemed to be present in
person and vote at such meeting. The notice of a special meeting shall state, in
addition, the purpose or purposes for which the meeting is called. If notice is
given by mail, such notice is deemed given when deposited in the United States
mail, postage prepaid, directed to the stockholder at the stockholder's address
as it appears on the records of the corporation. If notice is given by
electronic transmission, such notice shall be deemed given at the time specified
in Section 232 of the Delaware General Corporation Law.

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         1.5 Voting List. The officer who has charge of the stock ledger of the
corporation shall prepare, at least ten days before every meeting of
stockholders, a complete list of the stockholders entitled to vote at the
meeting, arranged in alphabetical order, and showing the address of each
stockholder and the number of shares registered in the name of each stockholder.
Such list shall be open to the examination of any stockholder, for any purpose
germane to the meeting for a period of at least ten days prior to the meeting:
(i) on a reasonably accessible electronic network, provided that the information
required to gain access to such list is provided with the notice of the meeting,
or (ii) during ordinary business hours, at the principal place of business of
the corporation. If the meeting is to be held at a place, then the list shall be
produced and kept at the time and place of the meeting during the whole time
thereof, and may be inspected by any stockholder who is present. If the meeting
is to be held solely by means of remote communication, then the list shall also
be open to the examination of any stockholder during the whole time of the
meeting on a reasonably accessible electronic network, and the information
required to access such list shall be provided with the notice of the meeting.

         1.6 Quorum. Except as otherwise provided by law, the Certificate of
Incorporation or these By-Laws, the holders of a majority of the shares of the
capital stock of the corporation issued and outstanding and entitled to vote at
the meeting, present in person, present by means of remote communication in a
manner, if any, authorized by the Board of Directors in its sole discretion or
represented by proxy, shall constitute a quorum for the transaction of business.
A quorum, once established at a meeting, shall not be broken by the withdrawal
of enough votes to leave less than a quorum.

         1.7 Adjournments. Any meeting of stockholders may be adjourned to any
other time and to any other place at which a meeting of stockholders may be held
under these By-Laws by the stockholders present or represented at the meeting
and entitled to vote, although less than a quorum, or, if no stockholder is
present, by any officer entitled to preside at or to act as Secretary of such
meeting. It shall not be necessary to notify any stockholder of any adjournment
of less than 30 days if the time and place, if any, of the adjourned meeting,
and the means of remote communication, if any, by which stockholders and
proxyholders may be deemed to be present in person and vote at such adjourned
meeting, are announced at the meeting at which adjournment is taken, unless
after the adjournment a new record date is fixed for the adjourned meeting. At
the adjourned meeting, the corporation may transact any business which might
have been transacted at the original meeting.

         1.8 Voting and Proxies. Each stockholder shall have one vote for each
share of stock entitled to vote held of record by such stockholder and a
proportionate vote for each fractional share so held, unless otherwise provided
by law, the Certificate of Incorporation or these By-Laws. Each stockholder of
record entitled to vote at a meeting of stockholders, or to express consent or
dissent to corporate action without a meeting, may vote or express such consent
or dissent in person or may authorize another person or persons to vote or act
for such stockholder by proxy executed or transmitted in a manner permitted by
the General Corporation Law of the State of Delaware by the stockholder or such
stockholder's authorized agent and delivered to the Secretary of the
corporation. No such proxy shall be voted or acted upon after three years from
the date of its execution, unless the proxy expressly provides for a longer
period.

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         1.9 Action at Meeting. When a quorum is present at any meeting, the
holders of a majority of the stock present or represented and voting on a matter
(or if there are two or more classes of stock entitled to vote as separate
classes, then in the case of each such class, the holders of a majority of the
stock of that class present or represented and voting on a matter) shall decide
any matter to be voted upon by the stockholders at such meeting, except when a
different vote is required by express provision of law, the Certificate of
Incorporation or these By-Laws. Any election by stockholders of directors shall
be determined by a plurality of the votes cast by the stockholders entitled to
vote at the election.

         1.10 Nomination of Directors. Only persons who are nominated in
accordance with the following procedures shall be eligible for election as
directors. Nomination for election to the Board of Directors of the corporation
at a meeting of stockholders may be made by the Board of Directors or by any
stockholder of the corporation entitled to vote for the election of directors at
such meeting who complies with the notice procedures set forth in this Section
1.10. Such nominations, other than those made by or on behalf of the Board of
Directors, shall be made by timely notice in writing to the Secretary of the
corporation. To be timely, a stockholder's notice must be delivered to, or
mailed and received by, the Secretary at the principal executive offices of the
corporation not less than 70 days nor more than 90 days prior to the first
anniversary of the preceding year's annual meeting; provided, however, that (i)
in the event that the date of the annual meeting is advanced by more than 20
days, or delayed by more than 70 days, from such anniversary date, notice by the
stockholder to be timely must be so delivered or received not earlier than the
ninetieth day prior to such annual meeting and not later than the close of
business on the later of the seventieth day prior to such annual meeting or the
tenth day following the day on which notice of the date of such annual meeting
was mailed or public disclosure of the date of such annual meeting was made,
whichever first occurs, and (ii) with respect to the annual meeting of
stockholders of the corporation to be held in the year 2001, to be timely, a
stockholder's notice must be so received not earlier than the ninetieth day
prior to such annual meeting and not later than the close of business on the
later of (A) the sixtieth day prior to such annual meeting and (B) the tenth day
following the day on which notice of the date of such annual meeting was mailed
or public disclosure of the date of such annual meeting was made, whichever
first occurs. A stockholder's notice to the Secretary shall set forth (a) as to
each proposed nominee (i) the name, age, business address and, if known,
residence address of each such nominee, (ii) the principal occupation or
employment of each such nominee, (iii) the number of shares of stock of the
corporation which are beneficially owned by each such nominee, and (iv) any
other information concerning the nominee that must be disclosed as to nominees
in proxy solicitations pursuant to Regulation 14A under the Securities Exchange
Act of 1934, as amended (including such person's written consent to be named as
a nominee and to serve as a director if elected); and (b) as to the stockholder
giving the notice (i) the name and address, as they appear on the corporation's
books, of such stockholder and (ii) the class and number of shares of the
corporation which are beneficially owned by such stockholder. In addition, to be
effective, the stockholder's notice must be accompanied by the written consent
of the proposed nominee to serve as a director if elected. The corporation may
require any proposed nominee to furnish such other information as may reasonably
be required by the corporation to determine the eligibility of such proposed
nominee to serve as a director of the corporation.

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         The chairman of the meeting may, if the facts warrant, determine and
declare to the meeting that a nomination was not made in accordance with the
foregoing procedure, and if such chairman should so determine, such chairman
shall so declare to the meeting and the defective nomination shall be
disregarded.

         1.11 Notice of Business at Annual Meetings. At an annual meeting of the
stockholders, only such business shall be conducted as shall have been properly
brought before the meeting. To be properly brought before an annual meeting,
business must be (a) specified in the notice of meeting (or any supplement
thereto) given by or at the direction of the Board of Directors, (b) otherwise
brought before the meeting by or at the direction of the Board of Directors, or
(c) otherwise properly brought before an annual meeting by a stockholder. For
business to be properly brought before an annual meeting by a stockholder, if
such business relates to the election of directors of the corporation, the
procedures in Section 1.10 must be complied with. If such business relates to
any other matter, the stockholder must have given timely notice thereof in
writing to the Secretary. To be timely, a stockholder's notice must be delivered
to, or mailed and received by, the Secretary at the principal executive offices
of the corporation not less than 70 days nor more than 90 days prior to the
first anniversary of the preceding year's annual meeting; provided, however,
that (i) in the event that the date of the annual meeting is advanced by more
than 20 days, or delayed by more than 70 days, from such anniversary date,
notice by the stockholder to be timely must be so delivered or received not
earlier than the ninetieth day prior to such annual meeting and not later than
the close of business on the later of the seventieth day prior to such annual
meeting or the tenth day following the day on which notice of the date of such
annual meeting was mailed or public disclosure of the date of such annual
meeting was made, whichever first occurs, and (ii) with respect to the annual
meeting of stockholders of the corporation to be held in the year 2001, to be
timely, a stockholder's notice must be so received not earlier than the
ninetieth day prior to such annual meeting and not later than the close of
business on the later of (A) the sixtieth day prior to such annual meeting and
(B) the tenth day following the day on which notice of the date of such annual
meeting was mailed or public disclosure of the date of such annual meeting was
made, whichever first occurs. A stockholder's notice to the Secretary shall set
forth as to each matter the stockholder proposes to bring before the annual
meeting (a) a brief description of the business desired to be brought before the
annual meeting and the reasons for conducting such business at the annual
meeting, (b) the name and address, as they appear on the corporation's books, of
the stockholder proposing such business, (c) the class and number of shares of
the corporation which are beneficially owned by the stockholder, and (d) any
material interest of the stockholder in such business. Notwithstanding anything
in these By-Laws to the contrary, no business shall be conducted at any annual
meeting except in accordance with the procedures set forth in this Section 1.11
and except that any stockholder proposal which complies with Rule 14a-8 of the
proxy rules (or any successor provision) promulgated under the Securities
Exchange Act of 1934, as amended, and is to be included in the corporation's
proxy statement for an annual meeting of stockholders shall be deemed to comply
with the requirements of this Section 1.11.

         The chairman of the meeting shall, if the facts warrant, determine and
declare to the meeting that business was not properly brought before the meeting
in accordance with the provisions of this Section 1.11, and if the chairman
should so determine, the chairman shall so

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declare to the meeting that any such business not properly brought before the
meeting shall not be transacted.

         1.12 Action without Meeting. Stockholders of the corporation may not
take any action by written consent in lieu of a meeting.

         1.13 Organization. The Chairman of the Board, or in the Chairman of the
Board's absence the Vice Chairman of the Board designated by the Chairman of the
Board, or the President, in the order named, shall call meetings of the
stockholders to order, and shall act as chairman of such meeting; provided,
however, that the Board of Directors may appoint any stockholder to act as
chairman of any meeting in the absence of the Chairman of the Board. The
Secretary of the corporation shall act as secretary at all meetings of the
stockholders; but in the absence of the Secretary at any meeting of the
stockholders, the presiding officer may appoint any person to act as secretary
of the meeting.

                             ARTICLE 2 - Directors

         2.1 General Powers. The business and affairs of the corporation shall
be managed by or under the direction of a Board of Directors, who may exercise
all of the powers of the corporation except as otherwise provided by law, the
Certificate of Incorporation or these By-Laws. In the event of a vacancy in the
Board of Directors, the remaining directors, except as otherwise provided by
law, may exercise the powers of the full Board until the vacancy is filled.

         2.2 Number; Election and Qualification. The number of directors which
shall constitute the whole Board of Directors shall be determined by resolution
of the Board of Directors, but in no event shall be less than three. The number
of directors may be decreased at any time and from time to time by a majority of
the directors then in office, but only to eliminate vacancies existing by reason
of the death, resignation, removal or expiration of the term of one or more
directors. The directors shall be elected at the annual meeting of stockholders
by such stockholders as have the right to vote on such election. Directors need
not be stockholders of the corporation.

         2.3 Classes of Directors. The Board of Directors shall be and is
divided into three classes: Class I, Class II and Class III. No one class shall
have more than one director more than any other class. If a fraction is
contained in the quotient arrived at by dividing the designated number of
directors by three, then, if such fraction is one-third, the extra director
shall be a member of Class I, and if such fraction is two-thirds, one of the
extra directors shall be a member of Class I and one of the extra directors
shall be a member of Class II, unless otherwise provided from time to time by
resolution adopted by the Board of Directors.

         2.4 Terms of Office. Each director (other than a director elected to
fill a vacancy in accordance with Section 2.6) shall serve for a term ending on
the date of the third annual meeting following the annual meeting at which such
director was elected; provided, that each initial director in Class I shall
serve for a term ending on the date of the annual meeting of stockholders in
2001; each initial director in Class II shall serve for a term ending on the
date of the annual meeting of stockholders in 2002; and each initial director in
Class III shall serve for a term ending on the date of the annual meeting of
stockholders in 2003; and provided further, that the

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term of each director shall be subject to the election and qualification of a
successor and to such director's earlier death, resignation or removal.

         2.5 Allocation of Directors Among Classes in the Event of Increases or
Decreases in the Number of Directors. In the event of any increase or decrease
in the authorized number of directors, (i) each director then serving as such
shall nevertheless continue as a director of the class of which such director is
a member and (ii) the newly created or eliminated directorships resulting from
such increase or decrease shall be apportioned by the Board of Directors among
the three classes of directors so as to ensure that no one class has more than
one director more than any other class. To the extent possible, consistent with
the foregoing rule, any newly created directorships shall be added to those
classes whose terms of office are to expire at the latest dates following such
allocation, and any newly eliminated directorships shall be subtracted from
those classes whose terms of offices are to expire at the earliest dates
following such allocation, unless otherwise provided from time to time by
resolution adopted by the Board of Directors.

         2.6 Vacancies. Any vacancy in the Board of Directors, however
occurring, including a vacancy resulting from an enlargement of the size of the
Board, shall be filled only by vote of a majority of the directors then in
office, although less than a quorum, or by a sole remaining director. A director
elected to fill a vacancy shall be elected for the unexpired term of such
director's predecessor in office, and a director chosen to fill a position
resulting from an increase in the number of directors shall hold office until
the next election of the class for which such director shall have been chosen,
subject to the election and qualification of a successor and to such director's
earlier death, resignation or removal.

         2.7 Resignation. Any director may resign by delivering a resignation in
writing or by electronic transmission to the corporation at its principal office
or to the President or Secretary. Such resignation shall be effective upon
receipt unless it is specified to be effective at some other time or upon the
happening of some other event.

         2.8 Regular Meetings. Regular meetings of the Board of Directors may be
held without notice at such time and place as shall be determined from time to
time by the Board of Directors; provided that any director who is absent when
such a determination is made shall be given notice of the determination. A
regular meeting of the Board of Directors may be held without notice immediately
after and at the same place as the annual meeting of stockholders.

         2.9 Special Meetings. Special meetings of the Board of Directors may be
held at any time and place designated in a call by the Chairman of the Board,
President, two or more directors, or by one director in the event that there is
only a single director in office.

         2.10 Notice of Special Meetings. Notice of any special meeting of
directors shall be given to each director by the Secretary or by the officer or
one of the directors calling the meeting. Notice shall be duly given to each
director (i) by giving notice to such director in person or by telephone at
least 24 hours in advance of the meeting, (ii) by sending a telegram, telecopy,
telex or electronic mail message, or delivering written notice by hand, to such
director's last known business or home address at least 24 hours in advance of
the meeting, or (iii) by mailing written notice to such director's last known
business or home address at least 72 hours in

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advance of the meeting. A notice or waiver of notice of a meeting of the Board
of Directors need not specify the purposes of the meeting.

         2.11 Meetings by Conference Communications Equipment. Directors or any
members of any committee designated by the directors may participate in a
meeting of the Board of Directors or such committee by means of conference
telephone or other communications equipment by means of which all persons
participating in the meeting can hear each other, and participation by such
means shall constitute presence in person at such meeting.

         2.12 Quorum. A majority of the total number of the whole Board of
Directors shall constitute a quorum at all meetings of the Board of Directors.
In the event one or more of the directors shall be disqualified to vote at any
meeting, then the required quorum shall be reduced by one for each such director
so disqualified; provided, however, that in no case shall less than one-third
(1/3) of the number so fixed constitute a quorum. In the absence of a quorum at
any such meeting, a majority of the directors present may adjourn the meeting
from time to time without further notice other than announcement at the meeting,
until a quorum shall be present.

         2.13 Action at Meeting. At any meeting of the Board of Directors at
which a quorum is present, the vote of a majority of those present shall be
sufficient to take any action, unless a different vote is specified by law, the
Certificate of Incorporation or these By-Laws.

         2.14 Action by Consent. Any action required or permitted to be taken at
any meeting of the Board of Directors or of any committee of the Board of
Directors may be taken without a meeting, if all members of the Board or
committee, as the case may be, consent to the action in writing or by electronic
transmission, and the written consents and electronic transmissions are filed
with the minutes of proceedings of the Board or committee.

         2.15 Removal. Directors of the corporation may be removed only for
cause by the affirmative vote of the holders of at least two-thirds of the
shares of the capital stock of the corporation issued and outstanding and
entitled to vote.

         2.16 Committees. The Board of Directors may designate one or more
committees, each committee to consist of one or more of the directors of the
corporation. The Board may designate one or more directors as alternate members
of any committee, who may replace any absent or disqualified member at any
meeting of the committee. In the absence or disqualification of a member of a
committee, the member or members of the committee present at any meeting and not
disqualified from voting, whether or not such member or members constitute a
quorum, may unanimously appoint another member of the Board of Directors to act
at the meeting in the place of any such absent or disqualified member. Any such
committee, to the extent provided in the resolution of the Board of Directors
and subject to the provisions of the General Corporation Law of the State of
Delaware, shall have and may exercise all the powers and authority of the Board
of Directors in the management of the business and affairs of the corporation
and may authorize the seal of the corporation to be affixed to all papers which
may require it. Each such committee shall keep minutes and make such reports as
the Board of Directors may from time to time request. Except as the Board of
Directors may otherwise determine, any committee may make rules for the conduct
of its business, but unless otherwise

                                     - 7 -
<PAGE>   11
provided by the directors or in such rules, its business shall be conducted as
nearly as possible in the same manner as is provided in these By-laws for the
Board of Directors.

         2.17 Compensation of Directors. Directors may be paid such compensation
for their services and such reimbursement for expenses of attendance at meetings
as the Board of Directors may from time to time determine. No such payment shall
preclude any director from serving the corporation or any of its parent or
subsidiary corporations in any other capacity and receiving compensation for
such service.

                              ARTICLE 3 - Officers

         3.1 Enumeration. The officers of the corporation shall consist of a
President, a Secretary, a Treasurer and such other officers with such other
titles as the Board of Directors shall determine, including a Chairman of the
Board, a Vice Chairman of the Board, and one or more Vice Presidents, Assistant
Treasurers and Assistant Secretaries. The Board of Directors may appoint such
other officers as it may deem appropriate.

         3.2 Election. The President, Treasurer and Secretary shall be elected
annually by the Board of Directors at its first meeting following the annual
meeting of stockholders. Other officers may be appointed by the Board of
Directors at such meeting or at any other meeting.

         3.3 Qualification. No officer need be a stockholder. Any two or more
offices may be held by the same person.

         3.4 Tenure. Except as otherwise provided by law, by the Certificate of
Incorporation or by these By-Laws, each officer shall hold office until such
officer's successor is elected and qualified, unless a different term is
specified in the vote choosing or appointing such officer, or until such
officer's earlier death, resignation or removal.

         3.5 Resignation and Removal. Any officer may resign by delivering a
written resignation to the corporation at its principal office or to the
President or Secretary. Such resignation shall be effective upon receipt unless
it is specified to be effective at some other time or upon the happening of some
other event.

         Any officer may be removed at any time, with or without cause, by vote
of a majority of the entire number of directors then in office.

         Except as the Board of Directors may otherwise determine, no officer
who resigns or is removed shall have any right to any compensation as an officer
for any period following such officer's resignation or removal, or any right to
damages on account of such removal, whether such officer's compensation be by
the month or by the year or otherwise, unless such compensation is expressly
provided in a duly authorized written agreement with the corporation.

         3.6 Vacancies. The Board of Directors may fill any vacancy occurring in
any office for any reason and may, in its discretion, leave unfilled for such
period as it may determine any offices other than those of President, Treasurer
and Secretary. Each such successor shall hold office for the unexpired term of
such officer's predecessor and until a successor is elected and qualified, or
until such officer's earlier death, resignation or removal.

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<PAGE>   12
         3.7 Chairman of the Board and Vice Chairman of the Board. The Board of
Directors may appoint a Chairman of the Board. If the Board of Directors
appoints a Chairman of the Board, such Chairman of the Board shall perform such
duties and possess such powers as are assigned by the Board of Directors. Unless
otherwise provided by the Board of Directors, such Chairman of the Board shall
preside at all meetings of the stockholders and at all meetings of the Board of
Directors. If the Board of Directors appoints a Vice Chairman of the Board, such
Vice Chairman of the Board shall, in the absence or disability of the Chairman
of the Board, perform the duties and exercise the powers of the Chairman of the
Board and shall perform such other duties and possess such other powers as may
from time to time be vested in such Vice Chairman of the Board by the Board of
Directors.

         3.8 President. The President shall, subject to the direction of the
Board of Directors, have general charge and supervision of the business of the
corporation. Unless the Board of Directors has designated the Chairman of the
Board or another officer as Chief Executive Officer, the President shall be the
Chief Executive Officer of the corporation. The President shall perform such
other duties and shall have such other powers as the Board of Directors may from
time to time prescribe.

         3.9 Vice Presidents. Any Vice President shall perform such duties and
possess such powers as the Board of Directors or the President may from time to
time prescribe. In the event of the absence, inability or refusal to act of the
President, the Vice President (or if there shall be more than one, the Vice
Presidents in the order determined by the Board of Directors) shall perform the
duties of the President and when so performing shall have all the powers of and
be subject to all the restrictions upon the President. The Board of Directors
may assign to any Vice President the title of Executive Vice President, Senior
Vice President or any other title selected by the Board of Directors.

         3.10 Secretary and Assistant Secretaries. The Secretary shall perform
such duties and shall have such powers as the Board of Directors or the
President may from time to time prescribe. In addition, the Secretary shall
perform such duties and have such powers as are incident to the office of the
secretary, including without limitation the duty and power to give notices of
all meetings of stockholders and special meetings of the Board of Directors, to
attend all meetings of stockholders and the Board of Directors and keep a record
of the proceedings, to maintain a stock ledger and prepare lists of stockholders
and their addresses as required, to be custodian of corporate records and the
corporate seal and to affix and attest to the same on documents.

         Any Assistant Secretary shall perform such duties and possess such
powers as the Board of Directors, the President or the Secretary may from time
to time prescribe. In the event of the absence, inability or refusal to act of
the Secretary, the Assistant Secretary (or if there shall be more than one, the
Assistant Secretaries in the order determined by the Board of Directors) shall
perform the duties and exercise the powers of the Secretary.

         In the absence of the Secretary or any Assistant Secretary at any
meeting of stockholders or directors, the person presiding at the meeting shall
designate a temporary secretary to keep a record of the meeting.

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<PAGE>   13
         3.11 Treasurer and Assistant Treasurers. The Treasurer shall perform
such duties and shall have such powers as may from time to time be assigned by
the Board of Directors or the President. In addition, the Treasurer shall
perform such duties and have such powers as are incident to the office of
treasurer, including without limitation the duty and power to keep and be
responsible for all funds and securities of the corporation, to deposit funds of
the corporation in depositories selected in accordance with these By-Laws, to
disburse such funds as ordered by the Board of Directors, to make proper
accounts of such funds, and to render as required by the Board of Directors
statements of all such transactions and of the financial condition of the
corporation.

         The Assistant Treasurers shall perform such duties and possess such
powers as the Board of Directors, the President or the Treasurer may from time
to time prescribe. In the event of the absence, inability or refusal to act of
the Treasurer, the Assistant Treasurer (or if there shall be more than one, the
Assistant Treasurers in the order determined by the Board of Directors) shall
perform the duties and exercise the powers of the Treasurer.

         3.12 Salaries. Officers of the corporation shall be entitled to such
salaries, compensation or reimbursement as shall be fixed or allowed from time
to time by the Board of Directors.

                           ARTICLE 4 - Capital Stock

         4.1 Issuance of Stock. Unless otherwise voted by the stockholders and
subject to the provisions of the Certificate of Incorporation, the whole or any
part of any unissued balance of the authorized capital stock of the corporation
or the whole or any part of any unissued balance of the authorized capital stock
of the corporation held in its treasury may be issued, sold, transferred or
otherwise disposed of by vote of the Board of Directors in such manner, for such
consideration and on such terms as the Board of Directors may determine.

         4.2 Certificates of Stock. Every holder of stock of the corporation
shall be entitled to have a certificate, in such form as may be prescribed by
law and by the Board of Directors, certifying the number and class of shares
owned by such holder in the corporation. Each such certificate shall be signed
by, or in the name of the corporation by, the Chairman or Vice Chairman, if any,
of the Board of Directors, or the President or a Vice President, and the
Treasurer or an Assistant Treasurer, or the Secretary or an Assistant Secretary
of the corporation. Any or all of the signatures on the certificate may be a
facsimile.

         Each certificate for shares of stock which are subject to any
restriction on transfer pursuant to the Certificate of Incorporation, the
By-Laws, applicable securities laws or any agreement among any number of
stockholders or among such holders and the corporation shall have conspicuously
noted on the face or back of the certificate either the full text of the
restriction or a statement of the existence of such restriction.

         4.3 Transfers. Except as otherwise established by rules and regulations
adopted by the Board of Directors, and subject to applicable law, shares of
stock may be transferred on the books of the corporation by the surrender to the
corporation or its transfer agent of the certificate representing such shares
properly endorsed or accompanied by a written assignment or power of

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<PAGE>   14
attorney properly executed, and with such proof of authority or the authenticity
of signature as the corporation or its transfer agent may reasonably require.
Except as may be otherwise required by law, by the Certificate of Incorporation
or by these By-Laws, the corporation shall be entitled to treat the record
holder of stock as shown on its books as the owner of such stock for all
purposes, including the payment of dividends and the right to vote with respect
to such stock, regardless of any transfer, pledge or other disposition of such
stock until the shares have been transferred on the books of the corporation in
accordance with the requirements of these By-Laws.

         4.4 Lost, Stolen or Destroyed Certificates. The corporation may issue a
new certificate of stock in place of any previously issued certificate alleged
to have been lost, stolen or destroyed, upon such terms and conditions as the
Board of Directors may prescribe, including the presentation of reasonable
evidence of such loss, theft or destruction and the giving of such indemnity as
the Board of Directors may require for the protection of the corporation or any
transfer agent or registrar.

         4.5 Record Date. The Board of Directors may fix in advance a date as a
record date for the determination of the stockholders entitled to notice of or
to vote at any meeting of stockholders, or entitled to receive payment of any
dividend or other distribution or allotment of any rights in respect of any
change, conversion or exchange of stock, or for the purpose of any other lawful
action. Such record date shall not be more than 60 nor less than ten days before
the date of such meeting, nor more than 60 days prior to any other action to
which such record date relates.

         If no record date is fixed, the record date for determining
stockholders entitled to notice of or to vote at a meeting of stockholders shall
be at the close of business on the day before the day on which notice is given,
or, if notice is waived, at the close of business on the day before the day on
which the meeting is held. The record date for determining stockholders for any
other purpose shall be at the close of business on the day on which the Board of
Directors adopts the resolution relating to such purpose.

         A determination of stockholders of record entitled to notice of or to
vote at a meeting of stockholders shall apply to any adjournment of the meeting;
provided, however, that the Board of Directors may fix a new record date for the
adjourned meeting.

                         ARTICLE 5 - General Provisions

         5.1 Fiscal Year. Except as from time to time otherwise designated by
the Board of Directors, the fiscal year of the corporation shall begin on the
first day of January in each year and end on the last day of December in each
year.

         5.2 Corporate Seal. The corporate seal shall be in such form as shall
be approved by the Board of Directors.

         5.3 Waiver of Notice. Whenever notice is required to be given by law,
by the Certificate of Incorporation or by these By-Laws, a written waiver,
signed by the person entitled to notice, or a waiver by electronic transmission
by the person entitled to notice, whether before, at or after the time stated in
such notice, shall be deemed equivalent to notice. Attendance of a

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<PAGE>   15
person at a meeting shall constitute a waiver of notice of such meeting, except
when the person attends a meeting for the express purpose of objecting at the
beginning of the meeting, to the transaction of any business because the meeting
is not lawfully called or convened.

         5.4 Voting of Securities. Except as the directors may otherwise
designate, the President or Treasurer may waive notice of, and act as, or
appoint any person or persons to act as, proxy or attorney-in-fact for this
corporation (with or without power of substitution) at any meeting of
stockholders or shareholders of any other corporation or organization, the
securities of which may be held by this corporation.

         5.5 Evidence of Authority. A certificate by the Secretary, or an
Assistant Secretary, or a temporary Secretary, as to any action taken by the
stockholders, directors, a committee or any officer or representative of the
corporation shall as to all persons who rely on the certificate in good faith be
conclusive evidence of such action.

         5.6 Certificate of Incorporation. All references in these By-Laws to
the Certificate of Incorporation shall be deemed to refer to the Certificate of
Incorporation of the corporation, as amended and in effect from time to time.

         5.7 Transactions with Interested Parties. No contract or transaction
between the corporation and one or more of the directors or officers, or between
the corporation and any other corporation, partnership, association or other
organization in which one or more of the directors or officers are directors or
officers, or have a financial interest, shall be void or voidable solely for
this reason, or solely because the director or officer is present at or
participates in the meeting of the Board of Directors or a committee of the
Board of Directors which authorizes the contract or transaction or solely
because any such director's or officer's votes are counted for such purpose, if:

                  (1) The material facts as to the director's or officer's
         relationship or interest and as to the contract or transaction are
         disclosed or are known to the Board of Directors or the committee, and
         the Board or committee in good faith authorizes the contract or
         transaction by the affirmative votes of a majority of the disinterested
         directors, even though the disinterested directors be less than a
         quorum;

                  (2) The material facts as to the director's or officer's
         relationship or interest and as to the contract or transaction are
         disclosed or are known to the stockholders entitled to vote thereon,
         and the contract or transaction is specifically approved in good faith
         by vote of the stockholders; or

                  (3) The contract or transaction is fair as to the corporation
         as of the time it is authorized, approved or ratified, by the Board of
         Directors, a committee of the Board of Directors, or the stockholders.

         Common or interested directors may be counted in determining the
presence of a quorum at a meeting of the Board of Directors or of a committee
which authorizes the contract or transaction.

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<PAGE>   16
         5.8 Severability. Any determination that any provision of these By-Laws
is for any reason inapplicable, illegal or ineffective shall not affect or
invalidate any other provision of these By-Laws.

         5.9 Pronouns. All pronouns used in these By-Laws shall be deemed to
refer to the masculine, feminine or neuter, singular or plural, as the identity
of the person or persons may require.

                             ARTICLE 6 - Amendments

         6.1 By the Board of Directors. These By-Laws may be altered, amended or
repealed or new by-laws may be adopted by the affirmative vote of a majority of
the directors present at any regular or special meeting of the Board of
Directors at which a quorum is present.

         6.2 By the Stockholders. Except as otherwise provided in Section 6.3,
these By-Laws may be altered, amended or repealed or new by-laws may be adopted
by the affirmative vote of the holders of a majority of the shares of the
capital stock of the corporation issued and outstanding and entitled to vote at
any regular or special meeting of stockholders, provided notice of such
alteration, amendment, repeal or adoption of new by-laws shall have been stated
in the notice of such regular or special meeting.

         6.3 Certain Provisions. Notwithstanding any other provision of law, the
Certificate of Incorporation or these By-Laws, and notwithstanding the fact that
a lesser percentage may be specified by law, the affirmative vote of the holders
of at least seventy-five percent (75%) of the shares of the capital stock of the
corporation issued and outstanding and entitled to vote shall be required to
amend or repeal, or to adopt any provision inconsistent with Section 1.3,
Section 1.10, Section 1.11, Section 1.12, Section 1.13, Article 2 or Article 6
of these By-Laws.

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