CMOS image sensor
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United States of America Patent
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Jul 4, 2017
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app pub date -
Jun 19, 2015
filing date -
Sep 17, 2014
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Abstract
A CMOS image sensor including: an array of M×N pixels, the pixels of a same column being connected to a same output track, each pixel including a photodiode, a sense node, a transfer transistor, a reset transistor, and a read circuit; and a test circuit including an assembly of N elementary reference cells respectively connected to the N output tracks of the sensor, each cell including a resistor, a sense node, a transfer transistor, a reset transistor, and a read circuit, the N resistors being series-connected between first and second nodes of application of a reference voltage.
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