EXHIBIT 23.1


                         CONSENT OF INDEPENDENT ACCOUNTANTS


     We consent to the incorporation by reference in this Registration 
Statement of Summit Design, Inc. on Form S-8 (i) of our report dated August 
21, 1997 on our audits of the financial statements of Simulation 
Technologies, Corp. as of December 31, 1995 and 1996 and June 30, 1997 and 
for each of the two years in the period ended December 31, 1996, and the six 
months ended June 30, 1997, which report is included in the Current Report on 
Form 8-K dated September 9, 1997, (ii) of our report dated February 20, 1997 
on our audits of the financial statements of TriQuest Design Automation, 
Inc., as of December 31, 1995 and 1996 and for the period from inception, 
February 15, 1995, to December 31, 1995, and for the year ended December 31, 
1996 which report is included in the Current Report on Form 8-K dated 
February 28, 1997 and (iii) of our report dated January 24, 1997, except for 
Note 14, for which the date is February 28, 1997, on our audits of the 
consolidated financial statements and financial statement schedule of Summit 
Design, Inc., and its subsidiaries as of December 31, 1995 and 1996 and for 
each of the three years in the period ended December 31, 1996, which report 
is included in the Annual Report on Form 10-K for the year ended December 31, 
1996.



                                        /s/ COOPERS & LYBRAND L.L.P.

Portland Oregon
March 6, 1998