Photoelectric conversion apparatus and photoelectric conversion system
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United States of America Patent
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Nov 7, 2017
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N/A
app pub date -
Mar 28, 2016
filing date -
Mar 30, 2015
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Abstract
In a photoelectric conversion apparatus, a pixel transistor and a differential transistor form a differential pair. A clamp circuit clamps a gate voltage of the differential transistor. An output circuit performs a first operation in which a voltage based on the voltage at the gate of a pixel transistor is output to the gate of the differential transistor. The output circuit also performs a second operation in which in response to receiving a current from the differential transistor, a signal based on a result of a comparison between the gate voltage of the pixel transistor and the gate voltage of the differential transistor is output to the output node. In the second operation, a control unit in the output circuit controls a change in the drain voltage of the differential transistor to be smaller than a change in the voltage at the output node.
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