Low-power High-speed Dynamic Comparator Using a New Regenerative Stage

A low-power, high-speed, double-tail dynamic comparator is presented. It adopts a new regenerative stage using separated gate-biasing cross-coupled transistors instead of the conventional cross-coupled invertor structure. The effective total transconductance of the regenerative stage is enhanced at the beginning of the regeneration, leading to a much faster comparison and lower energy consumption. The effectiveness of the new and improved structure was verified with simulations.