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Zero DC current readout circuit for CMOS image sensor using a precharge capacitor
Zero DC current readout circuit for CMOS image sensor using a precharge capacitor
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机译:使用预充电电容器的CMOS图像传感器的零直流电流读出电路
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摘要
A method of reading out a light signal from a pixel is disclosed. The method comprises first charging a capacitor to a predetermined voltage during a precharge stage. Next, during a readout stage, discharging the capacitor for a predetermined length of time through a pixel output transistor. The pixel output transistor is modulated by the light signal by applying the light signal to the gate of the pixel output transistor. Finally, the output signal is determined to be the voltage held by the capacitor.
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