Correcting charge transfer inefficiency in a charge coupled analog to digital converter
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United States of America Patent
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Sep 11, 2012
Grant Date -
N/A
app pub date -
Jun 29, 2009
filing date -
Oct 19, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A technique for correcting charge transfer inefficiencies in a Charge Coupled Device (CCD). The basic approach is to estimate the charge entering at a given stage in a CCD pipeline, and to then determine an estimate of the error introduced by the accumulated leftover charge that will be present at a second point, farther down the pipeline. The error is then corrected by injecting a correcting charge at a third point, farther still down the CCD pipeline. The invention is used, in one embodiment, to correct the output of a charge to digital converter, although principals of the invention may be used for other types of circuits.
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