EXHIBIT 11 FOR IMMEDIATE RELEASE HART-SCOTT-RODINO WAITING PERIOD EXPIRES FOR CADENCE - QUICKTURN MERGER SAN JOSE, Calif., January 11, 1998 -- Cadence Design Systems, Inc. (NYSE: CDN) and Quickturn Design Systems, Inc. (Nasdaq: QKTN) announced today that, in connection with their previously announced merger agreement, the required waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 has expired without a request for additional documents or information. The transaction remains subject to Quickturn stockholder approval and certain other conditions outlined in the merger agreement. As previously announced on January 5, 1999, Cadence and Quickturn amended their definitive merger agreement to increase to $15 from $14 the amount of Cadence stock that Quickturn stockholders will receive for each Quickturn share they own. Under terms of the Cadence-Quickturn merger agreement, Cadence will acquire Quickturn in a tax-free, stock-for-stock transaction with an aggregate purchase price of approximately $271 million for all of the outstanding shares of Quickturn. Quickturn Design Systems, Inc. is the leading provider of verification products and time-to-market engineering (TtMETM) services for the design of complex ICs and electronic systems. The company's products are used worldwide by developers of high-performance computing, multimedia, graphics and communications systems. Quickturn is headquartered at 55 W. Trimble Road, San Jose, CA 95131-1013; Telephone: 408/914-6000. For more information, visit the Quickturn Web site at www.quickturn.com or send e-mail to info@quickturn.com. Cadence Design Systems, Inc. provides comprehensive services and software for the product development requirements of the world's leading electronics companies. Cadence is the largest supplier of software products, consulting services, and design services used to accelerate and manage the design of semiconductors, computer systems, networking and telecommunications equipment, consumer electronics, and a variety of other electronic-based products. With more than 4,000 employees and 1997 annual sales of $916 milion, 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 may be obtained from the World Wide Web at http://www.cadence.com. # # # Contacts: Cadence Design Systems, Inc. Quickturn Design Systems, Inc. Ray Bingham (Investors) Ray Ostby (408) 944-7503 (408) 914-6000 Laurie Stanley (408) 428-5019 Gavin Anderson & Co. Abernathy MacGregor Frank Robert Mead Pauline Yoshihashi / Matt Sherman (212) 373-0226 (213) 630-6550 / (212) 371-5999