A High Efficiency Low Noise RF-to-DC Converter Employing Gm-Boosting Envelope Detector and Offset Canceled Latch Comparator

This work presents a high efficiency RF-to-DC conversion circuit composed of an LC-CL balun-based Gm-boosting envelope detector, low noise baseband amplifier, and offset canceled latch comparator. It was designed to have sensitivity with power consumption for wake-up receiver (WuRx) applications. The proposed detector is based on fully integrated inductively degenerated common-source amplifier series gate inductor. balun merged the core by sharing on-chip source inductors. technique doubles transconductance input transistor without any extra because voltage operates in differential mode. results higher gain. In order improve radio, DC comparator controlling body bias pair transistors through binary-weighted current cell. addition, hysteresis characteristic implemented avoid unstable operation large at compared signal. window programmable changing channel width transistor. amplifies output signal transfers it into noise. For 2.4 GHz WuRx, no external matching components shows simulated gain about 16.79 V/V when around −60 dBm, this 1.7 times than that conventional same load. achieves −65.4 dBm 45% 55% duty, dissipating 22 μW from 1.2 V supply voltage.