| 摘要 |
A correlated double sampling unit within a CMOS imager employs an image sensor having a plurality of photodetectors arranged in a series of rows and columns with a row addressing circuit, a column addressing circuit, a first sample and hold circuit allocated for each of the columns, a transfer circuit operatively connecting each of the columns to the first sample and hold circuit for each of the columns, and a plurality of second sample and hold circuits, each of the second sample and hold circuits being operatively connected to a subset of the first sample and hold circuits.
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