Module interface system for television receiver

Details Module interface system for television receiver Module interface system for television receiver

1995-08-02

1998-03-31

Peng, John K.

Television

Image signal processing circuitry specific to television

Switching

348565, 348839, 455348, H04N 5268

Patent

active

057344426

ABSTRACT:
A television chassis is arranged to receive a plug-in PIP module. When the PIP module is not installed, the composite video signal is passed through a chassis emitter follower interface circuit for video processing. The PIP module also includes an emitter follower interface circuit that supplies a composite video signal. When the PIP module is plugged in, it shares a bias resistor with the chassis emitter follower interface circuit and the PIP module interface circuit overrides the chassis interface circuit, thus passing the PIP module video signal for further video processing.

REFERENCES:
patent: 4855611 (1989-08-01), Isobi et al.
patent: 4949179 (1990-08-01), Hosono
patent: 5170262 (1992-12-01), Kinoshita et al.
patent: 5202765 (1993-04-01), Lineberry
patent: 5285265 (1994-02-01), Choi

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