Lee joined Analog Devices in 1990 where he was primarily involved in the design of high-speed clock recovery devices. In 1992, he joined Rambus Inc. where he developed high-speed analog circuitry for 500 megabyte/s CMOS DRAMs. He has also contributed to the development of PLLs in the StrongARM, Alpha and AMD K6/K7/K8 microprocessors. Lee joined the Department of Electrical Engineering in 1993. In 1994 he founded the
Stanford Microwave Integrated Circuits Laboratory. In 1998, Lee cofounded Matrix Semiconductor (acquired by
Sandisk in 2006). He founded ZeroG Wireless (acquired by
Microchip Technology) and is a cofounder of Ayla Networks. Lee was director of
DARPA's
Microsystems Technology Office from April 2011 to October 2012. Since early 2016, he has served on the Board of Directors of Xilinx. As of 2018, he holds more than 60 U.S. patents. ==Awards and memberships==