Patent ID: 8350626

Claim:
An amplifier circuit, comprising: a first supply terminal to receive a first reference voltage; a second supply terminal to receive a second reference voltage; a first pair of circuits, each connected between a respective one of a pair of input terminals and a respective one of a pair of output terminals, the first pair of circuits each including: a first transistor having a gate connected to the respective input terminal and a source connected to the first supply terminal; and a second transistor having a gate connected via a first impedance to a gate of the first transistor and a source connected to the second supply terminal; and a second pair of circuits, each connected between a respective one of the pair of input terminals and a respective one of the pair of output terminals, the second pair of circuits each including: a third transistor having a gate connected to the respective input terminal and a source connected to the first supply terminal; and a fourth transistor having a source connected to the second supply terminal and a gate connected via a second impedance to a gate of a second transistor from a respective one of the first circuits.