Power control circuit for a color encoder of a video camera

Details Power control circuit for a color encoder of a video camera Power control circuit for a color encoder of a video camera

1986-05-23

1987-10-13

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358906, 358 43, 307 34, 307112, 307116, 3071414, H04N 907, H02B 124, H01H 334

Patent

active

047002212

ABSTRACT:
A power control circuit for a color encoder of a video camera having a camera head portion, a signal processing circuit for generating a luminance signal and a chrominance signal, a color encoder supplied with the luminance signal and the chrominance signal and for generating a composite video signal, and an external output terminal at which the composite video signal is obtained includes a power switch for controlling the power supply to the color encoder, a comparator connected to the external output terminal and for comparing the level of a synchronizing signal at the external output terminal with a reference level and a control circuit supplied with the output of the comparator and for controlling the power switch such that the power switch is turned on when the external output terminal is terminated.

REFERENCES:
patent: 3931636 (1976-01-01), Schneider
patent: 4386376 (1983-05-01), Takimoto et al.
patent: 4507690 (1985-03-01), Azuma et al.

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