DIFFERENTIAL AMPLIFIER, SEMICONDUCTOR DEVICE, POWER SOURCE CIRCUIT AND ELECTRONIC DEVICE USING THE SAME

摘要

PURPOSE: To speedily stabilize the output voltage of a differential amplifier. CONSTITUTION: A differential amplifier circuit 10 is provided with an N type transistor 16 and an N type transistor 18 and operated by an input voltage VIN1. A differential amplifier circuit 30 is provided with a P type transistor 36 and a P type transistor 38 and operated by an input voltage VIN2D. A P type transistor 50 to be operated by a signal S1 from the differential amplifier circuit 10 and an N type transistor 52 to be operated by a signal S2 from the differential amplifier 30 are provided and a voltage between these transistors 50 and 52 becomes the output voltage VOUT. Then, a voltage control circuit 60 equipped with an N type transistor 62 is provided for speedily changing the gate voltage of the P type transistor 50 on the basis of a signal S3 from the differential amplifier circuit 30. A voltage control circuit 70 equipped with a P type transistor 72 is provided for speedily changing the gate voltage of the N type transistor 52 corresponding to a signal S4 from the differential amplifier circuit 10.