| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a comparator with a latching function that has a high-speed response. Ž<P>SOLUTION: A comparison amplification unit 20 compares a level of a signal in a positive line LP with that of a signal in a negative line LN and latches a comparison result. An input terminal of a first inverter 22 is connected to the positive line LP and an output terminal thereof is connected to the negative line LN. An input terminal of a second inverter 24 is connected to the negative line LN and an output terminal thereof is connected to the positive line LP. An activation switch 26 selectively switches between a state where the activation switch outputs a power supply voltage Vdd to the other power supply terminals of the inverters 22, 24 that are connected in common, such that the comparison amplification unit 20 is inactivated, and a state where the activation switch outputs a ground voltage VGND such that the comparison amplification unit 20 is activated. A comparator TC outputs a signal corresponding to at least one of the signal OP in the positive line LP and the signal ON in the negative line LN at a timing after the comparison amplification unit 20 is activated. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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