High speed video mixer circuit

Details High speed video mixer circuit High speed video mixer circuit

2005-05-10

2005-05-10

Kostak, Victor R. (Department: 2614)

Television

Image signal processing circuitry specific to television

Special effects

C348S705000, C348S569000

Reexamination Certificate

active

06891574

ABSTRACT:
A video amplifier having an on-screen display (OSD) capability uses one channel of an OSD input video signal to generate a blanking signal for blocking output of a video signal. When the blanking signal is asserted, the OSD channels provide the on-screen display. The blanking signal is generated in a high speed mixer circuit including an emitter-coupled differential pair for amplifying the OSD input signal about an operating DC offset voltage and a pull down circuit for providing the blanking signal.

REFERENCES:
patent: 5493340 (1996-02-01), Kim
patent: 5596298 (1997-01-01), Miller et al.
patent: 5689309 (1997-11-01), Nayebi et al.
patent: 5995166 (1999-11-01), Kawano
patent: 6212369 (2001-04-01), Avasarala

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