Horizontal drive circuit for video display

Details Horizontal drive circuit for video display Horizontal drive circuit for video display

1979-09-20

1981-04-21

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358158, H04N 504

Patent

active

042636159

ABSTRACT:
Disclosed is a horizontal drive system and method for operating a video display capable of precisely controlling over a wide timing range the interval between the arrival of the leading edge of the input drive pulse and the initiation of the flyback pulse thus permitting the horizontal output to the video display to be synchronized to a great variety of horizontal drive input signals. The leading edge of the horizontal drive pulse triggers a variable time delay monostable multivibrator, the locked output signal of which is coupled to a precision astable multivibrator. Potentiometer adjustment of the monostable multivibrator provides for adjusting video information position with respect to raster scan while the astable multivibrator acts as the oscillator in synchronizing horizontal sweep circuitry to the horizontal input drive signal.

REFERENCES:
patent: 3430067 (1969-02-01), Baum
patent: 3487167 (1969-12-01), Riggin et al.
patent: 3567857 (1971-03-01), Lynn
patent: 3794760 (1974-02-01), Moriki

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