| CPC H04N 25/771 (2023.01) [H04N 25/60 (2023.01)] | 21 Claims |
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1. An image sensor comprising:
a comparator comprising:
a first capacitor that samples a control voltage for controlling a pixel;
a second capacitor that samples a reference voltage corresponding to the control voltage;
a first switch that adjusts a voltage that is applied to the first capacitor;
a second switch that adjusts a voltage that is applied to the second capacitor;
a first feedback switch that connects a first output terminal of the comparator to a first input terminal of the comparator; and
a second feedback switch that connects a second output terminal of the comparator to a second input terminal of the comparator; and
an amplifier configured to generate a comparison signal by comparing a voltage of the first capacitor and a voltage of the second capacitor;
a controller configured to control the first switch and the second switch to apply a ground voltage to the first capacitor and the second capacitor, turn on the first feedback switch and the second feedback switch, and store a feedback voltage corresponding to an offset voltage of the comparator in the first capacitor and the second capacitor; and
a voltage generator configured to boost the control voltage based on the comparison signal.
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