A 5.24nW-77.2dBm-Sensitivity Wake-Up Receiver with Global Digital Temperature Compensation

This paper describes a −77.2 dBm sensitivity, 5.24 nW power consumption, and wide temperature range wake-up receiver (WuRX) for wireless sensor networks (WSNs). A global digital temperature compensation (GDTC) technology based on a gate leakage-based sensor is proposed, which achieves the low-power temperature compensation for all key modules. At a supply voltage of 0.4 V and an input RF power of ${- 7 6} \mathrm{dBm}$ at 915 MHz, the $S 11$ variation of the proposed WuRX is reduced by $67 \%$ when temperature changes from $-30^{\circ} \mathrm{C}$ to $70^{\circ} \mathrm{C}$.