CCD imager with on-chip processing
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United States of America Patent
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Apr 21, 1987
Grant Date -
N/A
app pub date -
Aug 27, 1985
filing date -
Aug 27, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CCD imager with a correlated clamp sample and hold amplifier on chip includes a chain of CCD wells, a charge-sensing node coupled to one end of the chain of CCD wells, and a clock to clock charge packets from the chain of CCD wells into the charge-sensing node. A dummy charge-sensing node is integrated into the same monocrystalline semiconductor substrate as the charge-sensing node, and the charge-sensing node and the dummy node are connected to a common reference voltage. An amplifier senses a predetermined voltage change on the charge-sensing node with reference to the voltage on the dummy node after a charge packet has been transferred into the charge-sensing node.
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