A 20 kbps 98 nW -62.8 dBm sensitivity wake-up receiver at 2.4 GHz

Abstract

This paper presents a highly integrated, relatively high data rate wake-up receiver (WuRX) designed and implemented in 65 nm CMOS technology. The receiver operates at 2.4 GHz band and exhibits robustness against power supply variations, and achieves a data rate of 20 kbps. It employs a sub-threshold enhanced differential structure for the envelope detector to enhance noise performance and a bias-free baseband amplifier to improve the sensitivity. Operating at a nominal voltage of 0.5 V, the WuRX consumes just 98 nW and achieves a sensitivity of -62.8 dBm.