Video signal compensating circuit of a TV/VCR

Details Video signal compensating circuit of a TV/VCR Video signal compensating circuit of a TV/VCR

1988-07-20

1990-07-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358184, 358166, H04N 5268, H04N 5205, H04N 591

Patent

active

049410474

ABSTRACT:
A video signal compensating circuit for a TV/VCR comprising a first amplifier for amplifying TV video signal which is input from a TV video signal input terminal, a second amplifier for amplifying VCR video signal which is input from VCR video signal input terminal, a control signal generator, a switching element, a third amplifier for amplifying the output signal of the switching element, a first photocoupler for outputting a signal proportional to the output signal of the third amplifier, an output amplifier for amplifying and outputting the output signal of the first photocoupler, a second photocoupler which is turned on and off according to the control signal of the control signal generator, and a negative feedback element for varying the emitter output signal of the transistor of the output amplifier according to "ON" or "OFF" of the second photocoupler and then feedbacks negatively to the base of the light receiving transistor of the first photocoupler. The circuit provides TV/VCR with clear pictures by preventing the input of video noise signals according to the frequency differences between the TV video signal and the VCR video signal.

REFERENCES:
patent: 4768110 (1988-08-01), Dunlap
patent: 4789905 (1988-12-01), Ezaki

Affiliated with

Also associated with

Rating

Video signal compensating circuit of a TV/VCR does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video signal compensating circuit of a TV/VCR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal compensating circuit of a TV/VCR will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1724053