Color signal processing circuit for a video cassette recorder

Details Color signal processing circuit for a video cassette recorder Color signal processing circuit for a video cassette recorder

1992-04-21

1994-12-27

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358327, 348571, 348705, H04N 979

Patent

active

053770129

ABSTRACT:
A color signal processing circuit for a VCR includes: an APC circuit for recording; an APC circuit for playback; a first circuit providing a color signal for recording; a second circuit providing a color signal for playback; and a switch block having a selection switch selecting one of the output signal lines of the first and second circuits to provide a color signal to the APC circuit for recording or the APC circuit for playback. In the color signal processing circuit, an emitter follower for outputting a signal are provided to each of the first and second circuits, and a switch operating in synchronization with an operation of the selection switch and providing a voltage for disabling the emitter follower of an un-selected signal line through the un-selected signal line is provided to the switch block. According to the above feature, when a signal line is selected between the signal lines by the selection switch, the un-selected signal line does not affect the other signal line and other circuits.

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