Patent ID: 9425748
Filing Date: 2016-08-23
CPC Classification: H03F

Claim Text:
1. An amplifier circuit, comprising: a first transistor that controls a first current between a first supply terminal and a first output terminal; a second transistor coupled to the first output terminal that controls a second current between the first output terminal and a second supply terminal; a third transistor that controls a third current between the first supply terminal and a second output terminal; a fourth transistor coupled to the second output terminal that controls a fourth current between the second output terminal and the second supply terminal; a first input terminal connected to a first control terminal of the first transistor and coupled to a fourth control terminal of the fourth transistor with a first switch; and a second input terminal connected to a second control terminal of the second transistor and coupled to a third control terminal of the third transistor with a second switch, wherein a first input signal is received at the first input terminal and a second input signal is received at the second input terminal, the first input signal different from the second input signal such that a differential between the first input signal and the second input signal is received at the amplifier circuit, and wherein operation of the first or second switch controls a gain of the amplifier circuit.