Video camera device with separate camera head and signal process

Details Video camera device with separate camera head and signal process Video camera device with separate camera head and signal process

1987-11-05

1989-05-16

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 98, 358148, H04N 514, H04N 718, H04N 504

Patent

active

048314447

ABSTRACT:
A video camera device in which camera head and signal processing circuit are provided separately and connected to each other by cable. Camera head includes CCD, drive pulse generator for generating a drive pulse of CCD, and first VCO for generating a clock pulse. Drive pulse generator frequency divides the clock pulse signal from first VCO to produce the drive pulse. Signal processing circuit includes signal processor for processing, e.g., clamping and sampling/holding a signal from CCD, timing generator for generating a timing signal of the signal processor, and a second VCO for generating a clock pulse. Timing generator frequency divides the clock pulse signal from second VCO to generate the timing signal. The output of first VCO is supplied from camera held through cable to signal processing circuit, and to phase comparator. The output of second VCO is also supplied to phase comparator. The oscillation frequency of second VCO is controlled by the output of phase comparator such that the phase difference detected by phase comparator is made zero.

REFERENCES:
patent: 3429994 (1969-02-01), Pay et al.
patent: 3655913 (1972-04-01), Schneider
patent: 3761627 (1973-09-01), Schneider
patent: 4164757 (1979-08-01), Smiley
patent: 4539586 (1985-09-01), Danna et al.
patent: 4706118 (1987-11-01), Kato et al.
patent: 4746975 (1988-05-01), Ogiu

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