H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/88
H04N 5/04 (2006.01)
Patent
CA 1156355
ABSTRACT OF THE DISCLOSURE 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.
364865
Beaumont Gregory J.
Steinmetz Richard J.
Macrae & Co.
Zenith Radio Corporation
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