IEEE Board of Directors Elevates Janusz Rajski to the Grade of IEEE Fellow

WILSONVILLE, Ore., December 20, 2011 – Mentor Graphics Corporation (NASDAQ: MENT) announced that Dr. Janusz Rajski has been named an IEEE Fellow. Dr. Rajski is being recognized for contributions to digital VLSI circuit testing and test compression. His innovations have enabled the IC industry to keep the cost of testing digital circuits almost constant over a ten year period when the complexity of ICs has expanded exponentially according to Moore’s Law. The IEEE Grade of Fellow is conferred by the IEEE Board of Directors upon a person with an outstanding record of accomplishments in any of the IEEE fields of interest. The total number selected in any one year cannot exceed one-tenth of one-percent of the total voting membership. IEEE Fellow is the highest grade of membership and is recognized by the technical community as a prestigious honor and an important career achievement. In 2011, 321 individuals have been elevated to IEEE Fellow. In 2002, Dr. Rajski published his first contribution on the Embedded Deterministic Test (EDT) technique. This method compresses test patterns before they are applied by automatic test equipment (ATE), and uses a small amount of logic in the IC under test to expand the patterns during the test process. The process is reversed to extract test results. This approach has achieved compression ratios of over 100X, greatly reducing the time required to test an IC, and also reducing the cost of the ATE itself, without reducing test coverage or quality. EDT technology is a critical component of the market leading Mentor Tessent® TestKompress® product line for high quality, low cost IC testing, which won the Best in Test award in 2001 and the Test of Time award in 2009 from Test and Measurement World magazine. The IEEE is the world’s leading professional association for advancing technology for humanity. Through its 385,000 members in 160 countries, the association is a leading authority on a wide variety of areas ranging from aerospace systems, computers and telecommunications to biomedical engineering, electric power and consumer electronics. Dedicated to the advancement of technology, the IEEE publishes 30 percent of the world’s literature in the electrical and electronics engineering and computer science fields, and has developed more than 900 active industry standards. The association also sponsors or co-sponsors nearly 400 international technical conferences each year. If you would like to learn more about IEEE or the IEEE Fellow Program, please visit www.ieee.org. (Mentor, Tessent and TestKompress are registered trademarks of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.)

About Mentor Graphics Mentor Graphics Corporation (NASDAQ: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world’s most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $800 million. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777. World Wide Web site: http://www.mentor.com