| 摘要 |
A differential amplifier circuit, a differentiation circuit and an output amplifier circuit are provided. The differential amplifier circuit differentially amplifies differentially inputted signals and provides an output. The differentiation circuit differentiates the output of the differential amplifier circuit, and adds the differentiated output to a bias voltage of a constant current transistor of the output amplifier circuit. A voltage comparator capable of higher speed operation without increasing its current consumption is provided.
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