Power Detector Based On Voltage Squaring

Abstract

This paper presents a novel power detector using a voltage squaring circuit as power sensing element. The proposed solution features low power capabilities, extendable input range and low distortion. The circuit is designed for 1.8V supply voltage and 50A current consumption. The maximum input voltage range is designed to be 250mV and non-linearity is less than 1% for 14dB dynamic range. The circuit is tested using 65nm CMOS triple well process and simulation results verify the theoretical analysis.