0000912057-97-002034 S-3 8 19970128 NYSE CADENCE DESIGN SYSTEMS INC 0000813672 7372 770148231 DE 1231 S-3 33 333-20591 97512640 555 RIVER OAKS PKWY SAN JOSE CA 95134 4089431234 555 RIVER OAKS PARKWAY SAN JOSE CA 95134 ECAD INC /DE/ 19880609 S-3 1 000091205797002034-001-seq1-s-3.txt S-3 EX-4.1 2 000091205797002034-002-seq2-ex-4-1.txt EXHIBIT 4.1-NON QUALIFED STOCK OPTION GRANT EX-4.2 3 000091205797002034-003-seq3-ex-4-2.txt EXHIBIT 4.2-NON QUALIFIED STOCK OPTION REGRANT EX-4.3 4 000091205797002034-004-seq4-ex-4-3.txt EXHIBIT 4.3-AMEND #1 TO NONQUALIFIED AGREEMENT EX-4.4 5 000091205797002034-005-seq5-ex-4-4.txt EXHIBIT 4.4-AMEND #1 TO NONQUALIFIED REGRANT EX-4.5 6 000091205797002034-006-seq6-ex-4-5.txt 1987 STOCK OPTION PLAN EX-5.1 7 000091205797002034-007-seq7-ex-5-1.txt EXHIBIT 5.1-OPINION OF COOLEY GODWARD LLP EX-23.1 8 000091205797002034-008-seq8-ex-23-1.txt EXHIBIT 23.1-CONSENT OF ARTHUR ANDERSEN