Video clamp

Details Video clamp Video clamp

1979-07-09

1981-04-07

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 518

Patent

active

042610150

ABSTRACT:
A video clamp for removing a DC offset voltage component from a video signal to simplify video processing circuitry in an image capture data system includes an input signal having an AC data component on a DC offset voltage and a device for periodically accumulating the DC offset voltage. This offset voltage is maintained on the accumulator by a periodic switching device and an apparatus which also reproduces its input DC voltage at its output. The apparatus is electrically biased with a required supply voltage resulting from a constant difference between DC levels each having the AC data component of the input signal.

REFERENCES:
patent: 3145263 (1964-08-01), Barnard
patent: 3159751 (1960-11-01), Bogdan, Jr.
patent: 3845326 (1974-10-01), Godden
patent: 3927255 (1975-12-01), Yorkanis
patent: 4001502 (1977-01-01), Van Roessel
patent: 4110787 (1978-08-01), Parker
patent: 4143398 (1979-03-01), Harwood

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