Compact readout circuit and a method for reading a pixel using a compact readout circuit
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United States of America Patent
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Feb 12, 2019
Grant Date -
Apr 27, 2017
app pub date -
Oct 31, 2016
filing date -
Oct 27, 2015
priority date (Note) -
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Abstract
A device comprising a pixel and a readout circuit, wherein the pixel is coupled to the readout circuit; wherein the readout circuit comprises a current control circuit and a comparator; wherein the current control circuit is configured to (a) charge the current control circuit to a pixel affected charge using at least a pixel affected current that is indicative of an electrical parameter of the pixel and (b) drain, based on the pixel affected charge, a current control circuit current during a comparison period; wherein the comparator is configured to compare, during the comparison period, between a pixel affected voltage and a reference signal that changes during the comparison period and to provide at least one pulse that has is indicative of a value of the pixel affected voltage.
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