An innovate negative feedback based active noise reduction method for mixed-signal design is presented in this paper. This negative feedback technique can substantially reduce the substrate coupling noise to 17% of the original noise level. A negative feedback loop is formed by sampling the noise and re-injecting it into the substrate with reversed phase. Test results from a MOSIS 1.2 μm CMOS process chip and SPICE simulations are reported
Published in:
ASIC/SOC Conference, 1999. Proceedings. Twelfth Annual IEEE International
Date of Conference: 1999