Patent ID: 8624671
Filing Date: 2014-01-07
Classification: H03F

Abstract:
1. An amplifying circuit, comprising: a first circuit component configured to receive at first and second input nodes and amplify a first input voltage and a second input voltage, respectively, wherein the first circuit component comprises a first amplifier having a first input current at the first input node and a second amplifier having a second input current at the second input node; a second circuit component configured to provide a first offset current summed with the first input current at the first input node of the first amplifier to compensate for variation in the first input current; and a third circuit component configured to provide a second offset current summed with the second input current at the second input node of the second amplifier to compensate for variation in the second input current; wherein the first offset current is mirrored from a reference current of the first amplifier and the second offset current is mirrored from a reference current of the second amplifier.