A High-Speed High-Resolution Latch Comparator for Pipeline Analog-to-Digital Converters

A high-speed and high-resolution comparator intended to be implemented in a 12bit 100MHz pipeline Analog-to-Digital Converter (ADC) for frequency wireless local area network application is proposed. The designed comparator presents a rail-to-rail input range preamplifier without any capacitance required. This comparator with a novel architecture of output stage achieves very high speed at a low kickback noise. The simulation results using a 0.35μm TSMC CMOS process technology show that this comparator exhibits a propagation delay of 2.8ns and has a very high resolution for a rail-to-rail input signal range, while consumes only 1.0mW of power with 5.0V voltage supply.