Rail-to-rail input push-pull output high-speed comparator circuit

The invention discloses a rail-to-rail input push-pull output high-speed comparator circuit. The rail-to-rail input push-pull output high-speed comparator circuit comprises a rail-to-rail input stage circuit, a low-power inverter circuit and a level shifter output circuit, the output end of the rail-to-rail input stage circuit is electrically connected with the input end of the low-power inverter circuit, and the output end of the low-power inverter circuit is electrically connected with the input end of the level converter output circuit; the rail-to-rail input stage circuit comprises a folded cascode input circuit and an amplitude limiting circuit; the output end of the folded cascode input circuit is electrically connected with the input end of the amplitude limiting circuit, the folded cascode input circuit performs amplification and fully differential processing on two input signals of the positive and negative input ends of the comparator, so that the input common mode range reaches rail-to-rail, and th