CMOS image sensor and image signal detecting method
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United States of America Patent
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Apr 30, 2013
Grant Date -
Feb 24, 2011
app pub date -
Jul 1, 2010
filing date -
Aug 24, 2009
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Abstract
A CMOS image sensor includes a photodiode, a switch configured to transfer a signal sensed by the photodiode to a sensing node, and a comparator electrically and directly connected to the sensing node and configured to compare the sensed signal of the sensing node and a ramp signal. Reset offset of the comparator is maintained at a constant offset voltage level during an initialization mode.
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