Patent ID: 6046612
Filing Date: 2000-04-04
Classification: G11C,H03K

Abstract:
A comparator circuit for comparing first and second inputs and which is operable in a sample phase and in a hold phase, said comparator circuit including:a first input capacitor connected to store a first voltage indicative of the first input when the comparator circuit is in the sample phase;a second input capacitor connected to store a voltage indicative of the second input when the comparator circuit is in the sample phase;an input comparator stage coupled to the first and second input capacitors and configured to switch from a measure state to one of a first and a second output states when the comparator circuit is in the hold phase based upon relative magnitudes of the first and second inputs; andreset circuitry configured to discharge the first and second capacitors in response to a change in the input comparator stage to one of the output states.