Video-index signal mixer

Details Video-index signal mixer Video-index signal mixer

1985-04-09

1986-12-09

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 66, H04N 924, H04N 922

Patent

active

046283498

ABSTRACT:
A wide-band video amplifier-index signal mixer for driving a beam index CRT includes a low power, high speed "off-the-shelf" video switching transistor having two inputs, one supplied by a first low power, high speed switching transistor coupled to receive video signals and another supplied by a second low power, high speed switching transistor coupled to receive index video signals. Both signals are in digital form. A video gate supplies the first transistor and an index gate supplies the second transistor. Another pair of gates are connected to also supply the video signal to the index gate. Thus, during occurrence of a video signal, both the video gate and the index gate are enabled and both inputs of the video switching transistor are activated.

REFERENCES:
patent: 4408223 (1983-10-01), Midland
patent: 4468690 (1984-08-01), Midland
patent: 4527192 (1985-07-01), Midland et al.

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