Patent ID: 8022764

Claim:
A differential amplifier, comprising a differential amplifier unit and a feedback unit to supply a feedback current to the differential amplifier unit, the differential amplifier unit including: first and second transistors composing a differential pair, each of the first and second transistors being provided with a current input end, a current output end connected to a lower potential power source and a control end, first and second loads which are cascade connected between a higher potential power source and the current input end of the first transistor, and third and fourth loads which are cascade connected between the higher potential power source and the current input end of the second transistor, wherein the feedback unit generates first and second feedback currents based on first and second output voltages obtained from a first node connecting the first transistor and the second load and a second node connecting the second transistor and the fourth load, and the feedback unit inputs the first and second feedback currents to a third node connecting the first and second loads and a fourth node connecting the third and fourth loads, respectively.