| 摘要 |
A comparator is provided. In a first period, input terminal of the pre-amplifier is coupled to a first voltage. A first terminal of the first capacitor is coupled to the second input terminal of the pre-amplifier. A second terminal of the first capacitor is coupled to the first input voltage in the first period, and is coupled to the second input voltage in the second period. The second capacitor is coupled between the output terminal of the pre-amplifier and an input terminal of the gain unit. The switch is coupled between the input terminal and an output terminal of the gain unit. An input terminal of the latch is coupled to the output terminal of the gain unit. The latch outputs a comparison result.
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