Welcome! You've reached the homepage of Fred S. Lee. I received my SB and MEng from MIT in 2002, and PhD in 2007. My doctoral work is entitled Energy Efficient Ultra-Wideband Radio Transceiver Architectures and Receiver Circuits. Here are links to my published work and curriculum vitae. I have since moved to Mountain View, CA, and am working at SiTime in Sunnyvale, CA, developing quartz-less timing reference and RF chips based on MEMS resonators. From 2007 to 2008. I was with Rambus in Los Altos, CA, focusing on mixed-signal multi-GHz wireline and 60GHz wireless transceiver circuits and systems.

Over the course of my research, I designed, fabricated, and tested 3 different RF/mixed-signal systems in packaged 0.18µm CMOS, 0.18µm SiGe BiCMOS, and 90nm CMOS technologies for ultra-wideband (UWB) radio receivers. I also co-developed prototype transceivers using off-the-shelf components to allow baseband algorithm testing. I led the assembly of my group's custom 3.1-10.6 GHz, 100Mbps UWB receiver chipset. My final body of work focuses on a scalable ultra-low energy efficient radio receiver for wireless sensor networks. For more detail on these projects and more, please visit projects.