Circuit for producing a video signal representing a measuring si

Details Circuit for producing a video signal representing a measuring si Circuit for producing a video signal representing a measuring si

1986-04-23

1987-10-13

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 324121R, H04N 1700, H04N 514

Patent

active

047002271

ABSTRACT:
A circuit for producing a video signal representing a measuring signal is already known, said circuit comprising a video storage circuit, a horizontal address control circuit for controlling said video storage circuit, a circuit for producing a vertical signal and a comparator circuit which, when the vertical signal essentially corresponds to a signal derived from the video storage circuit, produces a comparison signal representative of a point of the measuring signal in the instantaneously produced line of the video signal. For the purpose of improving the measuring signal representation quality, the invention provides the feature that a video D/A converter and a low-pass filter circuit are inserted between the video storage circuit and the comparator circuit.

REFERENCES:
patent: 3686662 (1972-08-01), Blixt et al.
patent: 3875328 (1975-04-01), Gibson et al.
patent: 4068310 (1978-01-01), Friauf
patent: 4225940 (1980-09-01), Moriyasu et al.
patent: 4268851 (1981-05-01), Heller et al.
patent: 4326219 (1982-04-01), Griesshaber

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