Image signal selector for television receiver combined with vide

Details Image signal selector for television receiver combined with vide Image signal selector for television receiver combined with vide

1988-07-20

1990-08-07

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 576

Patent

active

049472631

ABSTRACT:
The invention provides a device that selects the input image signal out of image signals of a TV set, VCR and an external apparatus in the TV with VCR. The device includes two ICs for switches Nos. 1 and 2, muting circuits 4 and 5, inverters 8, image signal insulation section 12, LED drive 17 and photocoupler 18. The ICs operate the internal switches according to the low or high voltage applied to respective control terminals T0, T1 and L0, L1. The image signal insulation 12 insulates to perform amplification and DC clamping in compliance with the input image signals.

REFERENCES:
patent: 4031548 (1977-06-01), Kato et al.
patent: 4267563 (1981-05-01), Sato et al.
patent: 4435842 (1984-03-01), Mayumi et al.

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