Compact active pixel with low-noise image formation
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United States of America Patent
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May 3, 2005
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app pub date -
Oct 26, 2000
filing date -
Oct 26, 2000
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Abstract
A low-noise active pixel circuit is disclosed that efficiently suppresses reset (kTC) noise by using a compact preamplifier consisting of a photodetector and only three transistors of identical polarity, in conjunction with ancillary circuits located on an imager's periphery. The use of only three transistors with a tapered reset signal allows the optical area to be increased, while still providing a low-noise imager.
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