To provide a differential operational amplifier capable of sufficiently supplying a current to a load in a dynamic operation, decreasing the power consumption in a static operation, reducing the offset, and reducing the distortion.
The differential operational amplifier is provided with: output transistors 50, 60 of a positive polarity side whose control terminals respectively receive one output signal from a differential transistor pair 10 via a current voltage conversion circuit 20 of a positive polarity side, and output transistors 70, 80 of a negative polarity side whose control terminals respectively receive the other output signal from the differential transistor pair 10 via a current voltage conversion circuit 30 of a negative polarity side. The output transistors 50, 70 are operated in a class A amplification operation region and the output transistors 70, 80 are operated in a class B amplification operation region.
SORAMOTO TAKAO
YOKOYAMA AKIO
