Electrical & Computer Engineering     |     Carnegie Mellon

Thursday, January 31, 12:00-1:00 p.m. HH-1112

Jiangfeng Wu
Carnegie Mellon University

A Low-Noise Low-Offset Chopper Stabilized Capacitive Readout Amplifier for CMOS MEMS Accelerometer

A CMOS chopper stabilized amplifier with dc/ac offset cancellation is designed for capacitive readout of motion in MEMS structures. It achieves 40 nV/rtHz noise floor, 10 uV DC offset, and 40 dB of sensor offset reduction. This amplifier, integrated into a monolithic CMOS MEMS accelerometer, achieves 50 ug/rtHz noise floor. It is one of the lowest noise floors ever reported by surface micromachined MEMS accelerometers.

Jiangfeng Wu received his BSEE from Tsinghua University, Beijing, China and his MSEE from the University of Pittsburgh, Pittsburgh, PA. Since 1997 he has been working on his Ph.D. at Carnegie Mellon University with Professor Rick Carley as his advisor. He is currently working on MEMS interface circuit design.