HIGH SPEED LOW CURRENT VOLTAGE COMPARATOR

摘要

In one embodiment, a voltage comparator circuit includes a first comparator circuit to compare a first voltage and a second voltage and a second comparator circuit to compare the first voltage and the second voltage. The voltage comparator circuit may include charge storage circuitry and positive feedback circuitry. Such circuitry may boost current within the first and second comparator circuits to enable the voltage comparator circuit to output a comparison decision within a delay threshold in response to input transitions within a slew rate threshold.

主权项

1. An apparatus comprising:
a first comparator having a first common gate input stage with a first input terminal to receive a first voltage and a second input terminal to receive a second voltage, a first capacitor coupled between the first input terminal and a common gate connection of the first common gate input stage, the first common gate input stage to output a first comparison signal, and a first feedback circuit to provide a first boost current to the first common gate input stage responsive to a first value of the first comparison signal and to pull down a level of the first comparison signal responsive to a first value of a second comparison output signal, the first comparator to output a first comparison output signal based on the first comparison signal; and a second comparator having a second common gate input stage with a first input terminal to receive the second voltage and a second input terminal to receive the first voltage, and a second capacitor coupled between the first input terminal of the second common gate input stage and a common gate connection of the second common gate input stage, the second common gate input stage to output a second comparison signal, the second comparator to output the second comparison output signal based on the second comparison signal.