Patent ID: 7511549
Filing Date: 2009-03-31
Classification: H03K

Abstract:
1. A multistage comparator circuit having inputs and outputs, the comparator circuit comprising: first pre-amplification circuitry having inputs selectively coupled to the comparator inputs; at least one capacitor coupled to an output of the first pre-amplification circuit; second pre-amplification circuitry having inputs, wherein each input of the second pre-amplification circuitry is coupled to a respective output of the first pre-amplification circuitry and one input of the second pre-amplification circuitry is coupled to an output of the first pre-amplification circuitry through the capacitor; latch circuitry electrically coupled to the outputs of the second pre-amplification circuitry, wherein the outputs of the latch circuit are electrically coupled to the outputs of the comparator; and first switching circuitry for selectively coupling an output of the latch circuitry to an input of the second pre-amplification circuitry.