Synchronous signal polarity converter of video card

Details Synchronous signal polarity converter of video card Synchronous signal polarity converter of video card

1990-12-28

1992-10-27

Weldon, Ulysses

Communications: electrical

Visual indication

Movable

358148, G09G 300

Patent

active

051593270

ABSTRACT:
A synchronous signal polarity converter of a video card comprises a data output circuit including a graphic processor and a buffer, a driving control circuit, and a synchronous signal output circuit, wherein the polarity control data can be changed as desired and the desired polarity of the synchronous signals can be provided by combining the polarity-control data in a data storage circuit with the synchronous signals of graphic processor.

REFERENCES:
patent: 4453183 (1984-06-01), Balaban et al.
patent: 4727362 (1988-02-01), Rackley et al.
patent: 4800429 (1989-01-01), Perkins

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