| 摘要 |
A CCD signal read-out circuit is operative, upon receipt of a CCD signal outputted from a CCD, to output an output signal from which a reset noise has been removed through correlated double sampling. The CCD signal includes pixel periods each comprising a reset period, a succeeding feed-through period and a further succeeding pixel signal period. The read-out circuit comprises: first and second signal extractors for receiving the CCD signal and extracting a feed-through signal and a pixel signal for the respective pixel periods, respectively; first and second low-pass filters for low-pass filtering the feed-through signal and the pixel signal extracted by the first and second signal extractors, respectively; a signal hold circuit for sampling and holding the feed-through signal filtered by the first low-pass filter; and a differential amplifier for subtracting the pixel signal filtered by the second low-pass filter from a signal sampled and held by a signal hold circuit and outputting the resultant output signal.
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