| 摘要 |
A differential amplifier circuit includes a first transistor and a second transistor cooperatively forming a current mirror circuit, a third transistor connected in series to the first transistor and connected to an inverted input terminal through which a comparison voltage which is a predetermined constant voltage is input to the third transistor, a fourth transistor connected in series to the second transistor and connected to a non-inverted input terminal through which a feedback voltage which increases in proportion to an output voltage of the third transistor is input to the fourth transistor, a constant current source for supplying predetermined current to the first to fourth transistors, and an offset circuit connected in series to the third transistor, and has a predetermined input offset voltage provided between the inverted input terminal and the non-inverted input terminal.
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