Apparatus for eliminating noise in a solid-state image pickup de

Details Apparatus for eliminating noise in a solid-state image pickup de Apparatus for eliminating noise in a solid-state image pickup de

1987-09-14

1990-04-03

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821315, H04N 5232

Patent

active

049145193

ABSTRACT:
A solid state image pickup apparatus having a selector for selecting a plurality of sensor outputs through predetermined circuits includes a difference processing circuit for calculating a difference between a selected sensor signal and a reference signal selected through the same predetermined circuit as that of the selected sensor signal. The difference processing circuit includes a first holding circuit for holding the sensor signal, a second holding circuit for holding the selected reference signal, and a circuit for receiving the output signals from the first and second holding circuits and outputting a signal corresponding to a difference therebetween.

REFERENCES:
patent: 3904818 (1975-09-01), Kovac
patent: 4145721 (1979-03-01), Beaudouin et al.
patent: 4293877 (1981-10-01), Tsunekawa et al.
patent: 4380755 (1983-04-01), Endlicher et al.
patent: 4392157 (1983-07-01), Garcia et al.
patent: 4518863 (1985-05-01), Fukuoka et al.
patent: 4686554 (1987-08-01), Ohmi et al.
patent: 4742392 (1988-05-01), Hashimoto

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