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ANALOGY FILES SUIT AGAINST ANACAD, MENTOR GRAPHICS IN GROUNDBREAKING SOFTWARE PATENT CASE

 BEAVERTON, Ore., March 24 /PRNewswire/ -- Analogy Inc. today announced it has filed suit in federal court against Anacad Inc. and its technology partner, Mentor Graphics (NASDAQ: MENT), for alleged patent infringements. The action claims that Anacad, a subsidiary of a German company now distributing products in the United States, has violated one or more of Analogy's five U.S. patents. Because Beaverton-based Mentor Graphics distributes Anacad's products in the United States, it too is believed to infringe on Analogy's patents.
 Analogy's patents address a number of techniques for using an Analog Hardware Description Language (AHDL) in conjunction with an analog or mixed-signal simulator. Simulators are a critical element in the electronic design of computer chips, printed circuit boards and entire systems. A simulator allows a designer to see how a part will operate before it's actually built. It uses models of parts in much the same way a computer uses application software. These models are written in a language called an AHDL. (For more information about the patents, see descriptions below.)
 Analogy's Saber(TM) simulator, introduced in 1986, was the first analog simulator to make use of an AHDL, which the company also created, called MAST(R). Recently, Anacad introduced an analog simulator in the United States, ELDO, with its language, FAS, that is believed to violate one or more of Analogy's patents. Mentor Graphics' intention to sell Anacad products and to enter into a technology partnership with the German company was made public at a press conference in San Jose, Calif., on March 2, 1993.
 "Analogy has invested millions of dollars in developing new simulation technology and it is our responsibility to our shareholders to protect those investments," said Gary Arnold, Analogy's president and chief executive officer. "Our patents provide us protection in the marketplace against imitation of our technology and concepts." Arnold expressed regret about Mentor Graphics' involvement in the dispute. "Unfortunately, by partnering with Anacad and distributing its products, Mentor Graphics stepped into the line of fire."
 Analogy, a long-time advocate for and active participant in the AHDL standardization effort, still strongly believes in the necessity for and benefits of a standard language for analog and mixed-signal design. "Our implementation of AHDL models within our simulator is only one possible approach. We encourage others to pursue use of the modeling standard once it is available -- we simply want to discourage them from using our technology and thereby infringing on our patents," said Arnold.
 Analogy Inc., founded in January 1985, is a world leader in analog, mixed analog-digital and mixed technology (electrical, mechanical, hydraulic, etc.) design and simulation. Analogy currently offers the industry's de facto standard analog hardware description language: MAST. Analogy has offices and support staff throughout the United States, Europe and Asia, and is headquartered in Beaverton.
 Following are descriptions of each of Analogy's four patents:
 A. U.S. Patent No. 5,092,780, dated March 3, 1992. System Performance Simulator (Use of an AHDL with an analog simulator.) A system performance simulator which includes a library of models of elements with interface points suitable for association with another element.
 B. U.S. Patent No. 4,985,860, dated Jan. 15, 1991. Mixed-Mode Simulator I/F (Calaveras(R) Algorithm). A system used to synchronize analog and digital simulation algorithms at non-regular intervals to perform simulation of a single, mixed-mode system.
 C., D. U.S. Patent No. 5,046,024 dated Sept. 3, 1991. U.S. Patent No. 5,199,103, dated March 30, 1993. Vector Calculator Apparatus for Graphic Waveform Manipulation (Waveform Calculator).
 E. U.S. Patent No. 4,868,770, dated Sept. 19, 1989. Simulation Results Enhancement Method and System. (Parameter Extraction.) A method and system for extracting information from a simulation that was not explicitly obtained during simulation from a simulations results database and a modeling subsystem (such as AHDL).
 NOTE: MAST is a registered trademark, and Saber is a trademark of Analogy Inc.
 -0- 3/24/93
 /CONTACT: Kerry McClenahan of McClenahan Bruer Communications, 503-643-9035, for Analogy; or Doug Johnson of Analogy, 503-626-9700/
 (MENT)


CO: Analogy Inc.; Mentor Graphics Corp.; Anacad Inc. ST: Oregon, California IN: CPR SU:

LM-SW -- SE013 -- 9244 03/24/93 16:27 EST
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Date:Mar 24, 1993
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