| 摘要 |
A differential amplifier according to the present invention comprises, in addition to a differential amplifier circuit and an output-stage amplifier circuit, a first source follower circuit for buffering a first output signal of the differential amplifier circuit, a second source follower circuit for buffering the first output signal of the differential amplifier circuit, and a source ground amplifier circuit, to a source of which an output terminal of the second source follower circuit is connected, and driven by a second output signal of the differential amplifier circuit, wherein a first-polar transistor in the output-stage amplifier circuit is driven by an output signal of the first source follower circuit, and the second-polar transistor is driven by an output signal of the source ground amplifier circuit.
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