Based on the physical understanding of noise mechanisms in active mixers, a noise cancellation technique to reduce the flicker noise contribution of the switches in a Gilbert-type mixer is presented.

A 0.5V self-mixer-first 550MHz 220nW wake-up receiver in 0.13um CMOS has a -56.4dBm sensitivity at 36.36kbps and an energy consumption of 6.1pJ/bit. A 10-stage voltagemultiplying self-mixer using MOS ...