A 3-GHz, 22-ps/dec Dynamic Comparator using Negative Resistance Combined with Input Pair

Abstract

A high speed, low delay/log(Delta Vin) dynamic comparator using negative resistance combined with input differential pair is proposed and designed in TSMC 90nm CMOS process technology. The delay/log(Delta Vin) of the comparator is 22ps/dec and consumes 213 mu W at 3GHz clock rate and 1.2V supply. The standard deviation of the comparator input refer offset is 25mV.