An Overview Of Dynamic CMOS Comparators

Abstract

The circuit performance of dynamic CMOS comparators has been reviewed in this work. CMOS dynamic comparators contributes a major role on the implementation of mixed signal successive approximation register (SAR) type analog to digital converters (ADC). High precision, dynamic range, low voltage operation, high speed, low power consumption, reliability and offset voltage are the critical factors to be considered while designing CMOS dynamic comparators. This paper reviewed the performance of some popular dynamic CMOS comparators such as strong arm latch comparator, dynamic latched comparator, resistive diode comparator, double tail comparators, differential pair comparator and Lewis-Grey comparator.