Session 20-4

A 4.4µW Wake-Up Receiver using
Ultrasound Data Communications

 

Abstract

We demonstrate free-space ultrasound data communications for ultra-low power wireless wake-up in sensor networks. Using ultrasound carriers allows for an order-of-magnitude power reduction over RF based solutions. The 65nm CMOS 0.6V receiver prototype achieves a BER of better than 10^-3 over 8.6m for a 0.25kb/s free-space link in a typical indoor environment while dissipating only 4.4µW and requiring only -18dBm transmit signal power.