| 摘要 |
A comparator circuit includes a first and a second PMOS transistors having sources connected to a first power supply and drains connected to a first node, NMOS transistors having sources connected to a second power supply and drains connected to the first node, a third and a fourth PMOS transistors having sources connected to the first power supply and the drains connected to a second node, and a third and a fourth NMOS transistors having sources connected to the second power supply and drains connected to the second node. A reference voltage and a voltage of a signal to be compared against are applied to gates of the thirst and the third PMOS transistors, and gates of the first and the third NMOS transistors. A comparator unit 1 outputs a comparison result between voltage of the first and the second nodes.
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