Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2007-10-09
2007-10-09
Walsh, Daniel (Department: 2876)
Registers
Coded record sensors
Particular sensor structure
C235S462290, C235S462410, C235S462260, C235S454000, C348S255000
Reexamination Certificate
active
10823642
ABSTRACT:
An image input system includes a solid state image pickup device and a preprocessor for performing correlated double sampling amplification on an output of the image pickup device and outputting a video signal. The preprocessor has a correlated double sampling amplifier for outputting signal information corresponding to a difference voltage between the black level in a feedthrough period of the image pickup device and a signal level in a charge signal output period; and an offset cancelling circuit for cancelling an offset voltage corresponding to the difference voltage in a state where the image pickup device is optically interrupted to the input terminal of the correlated double sampling amplifier. The correlated double sampling amplifier cancels out the offset voltage and the offset cancelling voltage as signal components of polarities opposite to each other, so that circuits following the correlated double sampling amplifier are not influenced by the offset voltage.
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Kasahara Masumi
Nakajima Hiroki
Yahagi Kouichi
Hitachi Tohbu Semiconductor, Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Renesas Technology Corp.
Walsh Daniel
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