Patent ID: 8125274

Claim:
A differential amplifier, comprising: a first current path that is connected between a first power-supply terminal and a second power-supply terminal, and outputs one of differential output signals; and a second current path that is connected between the first power-supply terminal and the second power-supply terminal, and outputs the other of the differential output signals, wherein the first current path includes: a first transistor that is selectively interconnected between the first power-supply terminal and a first output terminal that outputs one of the differential output signals, and has a control terminal receiving one of the differential input signals; a second transistor that is connected between the second power-supply terminal and the first output terminal, and has a control terminal receiving the other of the differential input signals; and a first switch circuit that is connected between the first power-supply terminal and the first transistor, and the second current path includes: a third transistor that is selectively interconnected between the second power-supply terminal and a second output terminal that outputs the other of the differential output signals, and has a control terminal receiving one of the differential input signals; a fourth transistor that is connected between the first power-supply terminal and the second output terminal, and has a control terminal receiving the other of the differential input signal; and a second switch circuit that is connected between the second power-supply terminal and the third transistor, and a drive state of each of the first and second switch circuits is controlled by a control signal.