A -106dBm 33nW Bit-Level Duty-Cycled Tuned RF Wake-up Receiver

Abstract

This work presents a 33 nW wake-up receiver with -106 dBm sensitivity at 428 MHz. Within-bit duty cycling allows RF gain at nano-watt DC power levels providing 26 dB sensitivity improvement over prior art at iso-power. An RF MEMS filter and an automatic gain and offset control loop suppress noise and reject interference. The receiver can be digitally tuned across DC power, latency, and sensitivity to provide flexible functionality from indoor short range to outdoor long-range applications.