Patent ID: 8390609

Claim:
A differential amplifier comprising: a differential pair that differentially receives signals; a current source connected between a first power supply terminal and the differential pair, the current source supplying current to the differential pair; a current-to-voltage converter that responsive to an output current of the differential pair, produces first and second voltage signals; a first transistor of a first conductivity type and a second transistor of a second conductivity type that are connected in series between the first power supply terminal and a second power supply terminal, the first and second transistors having control terminals supplied with the first and second voltage signals from the current-to-voltage converter circuit, respectively; a third transistor of the first conductivity type connected between the second power supply terminal and an output terminal, the third transistor having a control terminal supplied with the first voltage signal from the current-to-voltage converter circuit; and a fourth transistor of the first conductivity type connected between the output terminal and the first power supply terminal, the fourth transistor having a control terminal connected to a connection node of the first and second transistors.