Patent ID: 8779802
Filing Date: 2014-07-15
Classification: H03F

Abstract:
1. An amplifier system, comprising: a comparison circuit including at least one input transistor having a gate coupled to a differential input signal node; and a compensating circuit coupled to the comparison circuit, the compensating circuit configured to maintain a transconductance of the at least one input transistor in the comparison circuit, wherein the compensating circuit includes: a bias voltage generator having first and second input transistors coupled together at a source/drain, wherein the first and second input transistors have same electrical characteristics as the at least one input transistor of the comparison circuit; and a differential amplifier having differential input nodes and differential output nodes, each of the differential output nodes being coupled to a respective one of the differential input nodes so that the differential amplifier is configured so that a magnitude of a signal applied to the differential input nodes of the differential amplifier is substantially equal to a magnitude of a signal applied to the differential output nodes of the differential amplifier.