The research on several innovative comparators

This paper introduces six innovative designs of comparators proposed in recent years. The original intention to propose these improvements mainly focuses on the indexes including speed, area, power and offset, which measure the performance of comparators. Several newly proposed techniques are effective in designs. An improved DOC (dynamic-offsetcancellation) could increase speed and save area; Floating inverter pre-amplifier (FIA) can realize maximizing energy efficiency and reducing noise; Importing on-chip inductors in regenerative comparators has been verified reaching attractive goals successfully. Modifying structures and transistor type is also a feasible approach. After optimization, dynamic bias latch-type improves its predecessor’s performance in energy and noise; N-parallel paths could be applied to improve driving capability of latch; A novel voltage comparator termed an edge-race comparator (ERC) outperforms the conventional edition---the edge-pursuit comparator (EPC).