<SUBMISSION>
<ACCESSION-NUMBER>0000891618-01-502759
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>2
<PERIOD>20011220
<ITEMS>7
<ITEMS>9
<FILING-DATE>20011221
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CADENCE DESIGN SYSTEMS INC
<CIK>0000813672
<ASSIGNED-SIC>7372
<IRS-NUMBER>770148231
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0102
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-10606
<FILM-NUMBER>1821047
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>2655 SEELY ROAD BLDG 5
<CITY>SAN JOSE
<STATE>CA
<ZIP>95134
<PHONE>4089431234
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>555 RIVER OAKS PARKWAY
<CITY>SAN JOSE
<STATE>CA
<ZIP>95134
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ECAD INC /DE/
<DATE-CHANGED>19880609
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>f78031e8-k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML>
<HEAD>
<TITLE>Cadence Design Systems, Inc. Form 8-K 12/20/01</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<HR size="4" noshade color="#000000" style="margin-top: -5px">
<HR size="1" noshade color="#000000" style="margin-top: -10px">




<P align="center"><FONT size="4"><B>SECURITIES AND EXCHANGE COMMISSION</B></FONT>

<DIV align="center"><FONT size="3"><B>WASHINGTON, D.C. 20549</B></FONT></DIV>

<P>
<HR width="18%" align="center" size="1" noshade>
<P>


<P align="center"><FONT size="4"><B>FORM 8-K</B></FONT>

<P align="center"><FONT size="2"><B>CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF<BR>
THE SECURITIES EXCHANGE ACT OF 1934</B></FONT>

<P align="center"><FONT size="2">Date of Report (Date of Earliest Event Reported):&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>December&nbsp;20, 2001</B></FONT>

<P align="center"><FONT size="5"><B>CADENCE DESIGN SYSTEMS, INC.</B></FONT>

<DIV align="center"><FONT size="2">(Exact Name of Registrant as Specified in its Charter)</FONT></DIV>

<CENTER>
<TABLE cellspacing="0" border="0" cellpadding="0" width="85%">
<TR valign="bottom">
        <TD width="34%">&nbsp;</TD>
        <TD width="3%">&nbsp;</TD>
        <TD width="30%">&nbsp;</TD>
        <TD width="3%">&nbsp;</TD>
        <TD width="30%">&nbsp;</TD>
</TR>
<TR valign="bottom">
        <TD align="center" valign="top"><FONT size="2"><B>DELAWARE</B></FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="center" valign="top"><FONT size="2">
<B>1-10606</B>
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="center" valign="top"><FONT size="2"><B>77-0148231</B></FONT></TD>
</TR>

<TR valign="bottom">
        <TD align="center" valign="top"><FONT size="2">(State or Other Jurisdiction of<BR>
Incorporation)</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="center" valign="top"><FONT size="2">
(Commission File Number)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="center" valign="top"><FONT size="2">(IRS Employer Identification No.)</FONT></TD>
</TR>
</TABLE>
</CENTER>
<P align="center"><FONT size="2"><B>2655 SEELY AVENUE, BUILDING 5<BR>
SAN JOSE, CALIFORNIA 95134</B><BR>
(Address of Principal Executive Offices) (Zip Code)</FONT>

<P align="center"><FONT size="2">Registrant&#146;s Telephone Number, Including Area Code: &nbsp;&nbsp;&nbsp;<B>(408)&nbsp;943-1234</B></FONT>

<P>
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<HR size="4" noshade color="#000000" style="margin-top: -10px">




<P align="center"><FONT size="2">&nbsp;
</FONT>

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<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
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	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD></TD><TD colspan="8"><A HREF="#000">Item&nbsp;7. Financial Statements, Pro Forma and Exhibits.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#001">Item&nbsp;9. Regulation&nbsp;FD Disclosure.</A></TD></TR>
<TR><TD colspan="9"><A HREF="#002">Signature</A></TD></TR>
<TR><TD colspan="9"><A HREF="#003">EXHIBIT INDEX</A></TD></TR>
<TR><TD colspan="9"><A HREF="f78031ex99-1.txt">EXHIBIT 99.1</A></TD></TR>
</TABLE>
</CENTER>
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>




<!-- link2 "Item&nbsp;7. Financial Statements, Pro Forma and Exhibits." -->
<DIV align="left"><A NAME="000"></A></DIV>
<P align="left"><FONT size="2">Item&nbsp;7. Financial Statements, Pro Forma and Exhibits.</FONT>

<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">
<TR valign="top">
   <TD width="1%" align="right" nowrap><FONT size="2">(a)</FONT></TD>
   <TD width="1%" nowrap><FONT size="2">&nbsp;&nbsp;</FONT></TD>
   <TD width="98%"><FONT size="2">Financial Statements of Business Acquired.</FONT></TD>
</TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
</TR>
<TR valign="top">
   <TD width="1%" align="right" nowrap><FONT size="2">&nbsp;</FONT></TD>
   <TD width="1%" nowrap><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
   <TD width="98%"><FONT size="2">Not applicable.</FONT></TD>
</TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
</TR>
<TR valign="top">
   <TD width="1%" align="right" nowrap><FONT size="2">(b)</FONT></TD>
   <TD width="1%" nowrap><FONT size="2">&nbsp;&nbsp;</FONT></TD>
   <TD width="98%"><FONT size="2">Pro Forma Financial Information.</FONT></TD>
</TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
</TR>
<TR valign="top">
   <TD width="1%" align="right" nowrap><FONT size="2">&nbsp;</FONT></TD>
   <TD width="1%" nowrap><FONT size="2">&nbsp;&nbsp;</FONT></TD>
   <TD width="98%"><FONT size="2">Not applicable.</FONT></TD>
</TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
</TR>
<TR valign="top">
   <TD width="1%" align="right" nowrap><FONT size="2">(c)</FONT></TD>
   <TD width="1%" nowrap><FONT size="2">&nbsp;&nbsp;</FONT></TD>
   <TD width="98%"><FONT size="2">Exhibits.</FONT></TD>
</TR>
</TABLE>
<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR valign="bottom">
        <TD width="5%">&nbsp;</TD>
        <TD width="1%">&nbsp;</TD>
        <TD width="1%">&nbsp;</TD>
        <TD width="1%">&nbsp;</TD>
        <TD width="5%">&nbsp;</TD>
        <TD width="87%">&nbsp;</TD>
</TR>
<TR valign="bottom">
        <TD><FONT size="1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
        <TD nowrap align="center" colspan="3"><FONT size="1">Exhibit No.</FONT></TD>
        <TD><FONT size="1">&nbsp;</FONT></TD>
        <TD nowrap align="left"><FONT size="1">Description</FONT></TD>
</TR>
<TR valign="bottom">
        <TD><FONT size="1">&nbsp;</FONT></TD>
        <TD colspan="3"><HR size="1" noshade></TD>
        <TD><FONT size="1">&nbsp;</FONT></TD>
        <TD nowrap align="center"><HR size="1" noshade></TD>
</TR>
<TR valign="bottom">
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD nowrap align="right" valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD align="right" valign="top"><FONT size="2">
99.1
</FONT></TD>
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Press Release of the Registrant issued on December&nbsp;20, 2001.</FONT></TD>
</TR>
</TABLE>

<!-- link2 "Item&nbsp;9. Regulation&nbsp;FD Disclosure." -->
<DIV align="left"><A NAME="001"></A></DIV>
<P align="left"><FONT size="2">Item&nbsp;9. Regulation&nbsp;FD Disclosure.</FONT>

<P><FONT size="2">On December&nbsp;20, 2001, Cadence Design Systems, Inc., a Delaware corporation (the
&#147;Registrant&#148;), announced the completion of its acquisition of Silicon
Perspective Corp., a California corporation (&#147;SPC&#148;). The acquisition of SPC
was effected by means of a merger pursuant to which a wholly-owned subsidiary
of the Registrant merged with and into SPC, with SPC as the surviving company.
</FONT>
<P align="right"><FONT size="2">2
</FONT>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<!-- link1 "Signature" -->
<DIV align="left"><A NAME="002"></A></DIV>
<P align="center"><FONT size="2"><B>Signature</B></FONT>

<P><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.
</FONT>
<P><FONT size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Dated as of December&nbsp;20, 2001
</FONT>
<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR>
        <TD width="50%">&nbsp;</TD>
        <TD width="1%">&nbsp;</TD>
        <TD width="49%">&nbsp;</TD>
</TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD colspan="2"><FONT size="2"><B>CADENCE DESIGN SYSTEMS, INC.</B></FONT></TD>
</TR>

<TR><TD>&nbsp;<BR>&nbsp;</TD></TR>
<TR>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">By:&nbsp;</FONT></TD>
        <TD align="center"><FONT size="2">/s/&nbsp;&nbsp;&nbsp;&nbsp;William Porter</FONT></TD>
</TR>
<TR>
        <TD colspan="2"><FONT size="1">&nbsp;</FONT></TD>
        <TD><HR size="1" noshade color="#000000"></TD>
</TR>
<TR valign="top">
        <TD colspan="2">&nbsp;</TD>
        <TD><FONT size="2">
William Porter<BR>
Senior Vice President and
Chief Financial Officer</FONT></TD>
</TR>
</TABLE>

<P align="right"><FONT size="2">3
</FONT>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<!-- link1 "EXHIBIT INDEX" -->
<DIV align="left"><A NAME="003"></A></DIV>

<P align="center"><FONT size="2"><B>EXHIBIT INDEX</B></FONT>

<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR valign="bottom">
        <TD width="8%">&nbsp;</TD>
        <TD width="5%">&nbsp;</TD>
        <TD width="87%">&nbsp;</TD>
</TR>
<TR valign="bottom">
        <TD nowrap align="center"><FONT size="1">Exhibit No.</FONT></TD>
        <TD><FONT size="1">&nbsp;</FONT></TD>
        <TD nowrap align="left"><FONT size="1">Description</FONT></TD>
</TR>
<TR valign="bottom">
        <TD nowrap align="center"><HR size="1" noshade></TD>
        <TD><FONT size="1">&nbsp;</FONT></TD>
        <TD nowrap align="center"><HR size="1" noshade></TD>
</TR>
<TR valign="bottom">
        <TD valign="top" align="center"><FONT size="2">99.1</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Press Release of the Registrant issued on December&nbsp;20, 2001.</FONT></TD>
</TR>
</TABLE>


<P align="right"><FONT size="2">4</FONT>


</BODY>
</HTML>

</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>f78031ex99-1.txt
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<PAGE>
                                                                    EXHIBIT 99.1



                        CADENCE COMPLETES ACQUISITION OF
                            SILICON PERSPECTIVE CORP.

        SAN JOSE, Calif. -- December 20, 2001 -- Cadence Design Systems, Inc.
(NYSE: CDN), the world's leading supplier of electronic design products and
services, today announced the completion of its acquisition of Silicon
Perspective Corporation (SPC), a privately-held design technology firm
headquartered in Santa Clara, California, specializing in virtual prototyping.
Financial terms were not disclosed.

          "Full chip, virtual prototyping allows customers to get their large
SoC designs to market significantly faster than was possible before," said Lavi
Lev, executive vice president and general manager for the Cadence IC Solutions
Business. "Customers have shown reduction in implementation times of 10x to 30x,
depending on the size of their design, with SPC tools. The combination of SPC
and Cadence SoC implementation software has been proven to address both design
turnaround and complexity management challenges. Together, Cadence and SPC are
well-positioned to take on even the most demanding IC design requirements."

        "This is a dramatic step forward for us and our customers," said Ping
Chao, senior vice president and general manager of Silicon Perspective, a
Cadence Company. "It represents a great advance in our combined company's
ability to field and support advanced technology around the world."

<PAGE>

        First Encounter, SPC's advanced virtual prototyping tool, includes
hierarchical floorplanning, placement, and analysis that reduce cycle times for
large designs. First Encounter will augment both current PKS/Silicon
Ensemble(R)(SE)-PKS and future Integration Ensemble (IE) for SoC synthesis,
place & route (SP&R) design technology from Cadence, thus enabling designers to
complete very large chips faster. First Encounter is currently used in
conjunction with Cadence(R) SP&R at numerous customer sites, with proven
success.

ABOUT CADENCE

        Cadence is the largest supplier of electronic design technologies,
methodology services, and design services. Cadence solutions are used to
accelerate and manage the design of semiconductors, computer systems, networking
and telecommunications equipment, consumer electronics, and a variety of other
electronics-based products. With approximately 5,700 employees and 2000 revenues
of approximately $1.3 billion, Cadence has sales offices, design centers, and
research facilities around the world. The company is headquartered in San Jose,
Calif., and traded on the New York Stock Exchange under the symbol CDN. More
information about the company, its products and services are available at
www.cadence.com.

                                     --end--

For more information, please contact:

Judy Erkanat

Cadence Design Systems, Inc.
408-894-2302
jerkanat@cadence.com


Cadence, the Cadence logo, and Silicon Ensemble are registered trademarks of
Cadence Design Systems, Inc. All other trademarks are the property of their
respective owners.

</TEXT>
</DOCUMENT>
</SUBMISSION>
