Variable rate horizontal deflection system for a video monitor

Details Variable rate horizontal deflection system for a video monitor Variable rate horizontal deflection system for a video monitor

H - Electricity

04

N

350/105

H04N 3/16 (2006.01) G09G 1/04 (2006.01) H03K 4/64 (2006.01)

Patent

CA 1213364

ABSTRACT OF THE DISCLOSURE A CRT video display includes a horizontal oscillator for producing a variable rate horizontal scan control signal in response to different resolution modes of operation. A horizontal output signal is produced in response to the variable rate horizontal scan control signal and a B+ voltage. The pulse amplitude of the horizontal output signal is maintained constant in response to changes in the rate of the horizontal scan control signal by appropriately adjusting the B+ voltage, whereby the high voltage and horizontal raster size of the display are maintained constant despite variations in the horizontal scan control signal which accommodate different resolution modes of operation.

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