Pattern generating circuit

Details Pattern generating circuit Pattern generating circuit

1981-09-24

1983-11-08

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

315365, 328188, 340734, 358 10, 358183, H04N 702

Patent

active

044145675

ABSTRACT:
A pattern generating circuit is disclosed for providing a fixed test pattern to be broadcast on a video display system such that an individual may test or repair the aforementioned video display system. The pattern generating circuit provides a horizontal sync signal, a vertical sync signal, and first and second video component signals which are then summed by a summing amplifier to form a video signal. The horizontal and vertical sync signals are then supplied to the video display system so as to activate the same. This, in turn, allows the video display system, upon receiving the video signal, to broadcast on its display screen the fixed test pattern.

REFERENCES:
patent: 2978540 (1961-04-01), Coate et al.
patent: 3559092 (1971-01-01), Roth
patent: 3578906 (1971-05-01), Holmstrom et al.
patent: 3750038 (1973-07-01), Meise et al.
DeJong-Crystal Controlled TV Pattern Generator-Electronics, Australia, Jun. 980-vol. 40, #3-pp. 42-50, 53.
TV Test Pattern Generator-Elektor-vol. 1, #7, pp. 1149-1152-Nov. 1975.
Pores-Video Switching for TV Broadcast Centers-Electronics, Dec. 1956-pp. 146-149.
Birch-Cross Hatch Generator-Practical Electronics-vol. 12, #9, pp. 708-715, Sep. 1976.

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