| 摘要 |
A first field effect transistor has a drain electrode connected to a first current input terminal of a first current mirror circuit and a gate electrode connected to a first voltage input terminal which is supplied with a first voltage input terminal. A second field effect transistor has a drain electrode connected to a first current output terminal of the first current mirror circuit and a gate electrode connected to a second voltage input terminal which is supplied with a second input voltage. A second current mirror circuit has a second current input terminal connected to the first current output terminal and a second current output terminal connected to a power terminal through a resistor and to a voltage output terminal which is supplied with an output voltage. A comparator may include third and fourth current mirror circuits instead of the first and the second field effect transistors. In this event, the third current mirror circuit has a third current input terminal supplied with a first input current and a third current output terminal connected to the first current input terminal. The fourth current mirror circuit has a fourth current input terminal supplied with a second input current and a fourth current output terminal connected to the first current output terminal.
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