Patent ID: 7952430

Claim:
An amplifier circuit for amplifying a differential input signal received at a first input node and a second input node of the amplifier circuit, the amplifier circuit comprising: a first feedback resistance connected between the first input node of the amplifier circuit and a first output node of the amplifier circuit; first transconductance circuitry arranged to inject a transconductance current at a point along the first feedback resistance, wherein the first transconductance circuitry is configurable to vary the point along the first feedback resistance where the transconductance current is injected; a second feedback resistance connected between the second input node of the amplifier circuit and a second output node of the amplifier circuit; and second transconductance circuitry arranged to inject another transconductance current at a point along the second feedback resistance, wherein the second transconductance circuitry is configurable to vary the point along the second feedback resistance where the another transconductance current is injected.