Patent ID: 7609093

Claim:
A comparator comprising: a current source that provides a source current to a first node; a first voltage supply terminal configured to receive a first supply voltage; a first transistor coupled between the first node and the first voltage supply terminal along a first current path; a second transistor coupled between the first node and the first voltage supply terminal along a second current path; a third transistor coupled between the first node and the first voltage supply terminal along a third current path, wherein the first, second and third current paths are separate and parallel current paths between the first node and the first voltage supply terminal; a first input terminal configured to receive a first differential input signal of the comparator, wherein the first input terminal is coupled to a gate of the first transistor; a second input terminal configured to receive a second differential input signal of the comparator, wherein the second input terminal is coupled to gates of the second and third transistors; a first capacitor coupled between the second input terminal and the first voltage supply terminal, wherein the first capacitor applies the second differential input signal to the comparator; and means for sampling the first differential input signal on the first capacitor.