Mr. Chang has been a member of our Board of Directors since September 1995. Mr. Chang currently serves as the Vice President and Senior General Manager of Worldwide Analog Products at Diodes, Inc, a NASDAQ-listed semiconductor company. Prior to that, Mr. Chang was the Chief Executive Officer of BCD Semiconductor Manufacturing Ltd., a NASDAQ-listed analog device company, from September 2008 until its acquisition by Diodes in March 2013. Mr. Chang served on the board of directors of Genesis Microchip Inc., a NASDAQ-listed semiconductor company, from November 2004 until its acquisition by STMicroelectronics in January 2008. From February 2000 to February 2003, Mr. Chang served as Chief Executive Officer of Programmable Microelectronics Company, Inc., a fabless semiconductor design company, which later became Chingis Technology Corporation, and which was acquired by Integrated Silicon Solution, Inc., a NASDAQ-listed company, in September 2012. From April 1992 to August 1996, Mr. Chang was the Director of Technology at Cirrus Logic, Inc., a semiconductor company. Mr. Chang received his B.S. in Electrical Engineering from the National Taiwan University and his M.S. in Electrical Engineering from the University of California, Los Angeles.
Mr. Christoffersen has been a member of our Board of Director since November 2009. Mr. Christoffersen served on the board of directors of Genesis Microchip Inc. from August 2002 until its acquisition by STMicorelectronics in January 2008. Mr. Christoffersen served as Chief Financial Officer of Monolithic Power Systems, Inc. (MPS), a semiconductor company, from June 2004 to April 2006, and served on MPS's board of directors from March 2004 to July 2004. Mr. Christoffersen served as Chief Financial Officer of NeoParadigm Labs, Inc. from 1998 to 1999 and as Chief Financial Officer of Chips & Technologies, Inc. from 1994 until its sale to Intel Corporation in 1998. Mr. Christoffersen was Executive Vice President, Director and Chief Operating Officer of Resonex, Inc. from 1991 to 1992. From 1986 to 1991, Mr. Christoffersen held several managerial positions with For Motor Company. Mr. Christoffersen is a Phi Beta Kappa graduate of Stanford University where he earned a B.A. in Economics. He also holds a Master's degree in Divinity from Union Theological Seminary in New York City.
Jesse W. Jack has been a member of our Board of Directors since 2002. Mr. Jack received a B.S. degree in business management from San Jose State University in 1960, a J.D. Degree from the University of California, Hastings College of the Law in 1963 and was admitted to practice law in the State of California in 1964. Mr. Jack is a member of the American Bar Association, California State Bar Association and the Bar Association of Santa Clara County where he has served on numerous committees. Mr. Jack chaired the legal ethics committee and attorney fee arbitration committee. Mr. Jack has been in the private practice of law since 1964. He currently serves on the Board of Directors of several privately held companies, and is the Vice President and General Counsel for I-Bus Corporation Mr. Jack was one of the founding directors of the Parkinson's Institute a non-profit corporation.
HUA LEE has been a member of our board of directors since February 2006. Dr. Lee is currently Professor of Electrical and Computer Engineering at the University of California, Santa Barbara. He served as Department Vice Chair from 1993 to 1995 and Department Chairman from 1998 to 2002. Prior to his tenure at UC Santa Barbara, he was on the faculty of the University of Illinois at Urbana-Champaign. Dr. Lee received the Presidential Young Investigator Award in 1985, Professor of the Year Award in 1992, Pattern Recognition Society Award in 1993, Academic Senate Distinguished Teaching Award in 1998, and the College of Engineering Outstanding Faculty Award in 2000. He is a Fellow of the Acoustical Society of America and IEEE. Professor Lee received his BS degree from the National Taiwan University, and MS and PhD from the University of California, Santa Barbara.