Signal processor for switched vertical deflection system

Details Signal processor for switched vertical deflection system Signal processor for switched vertical deflection system

1977-02-07

1978-03-28

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, H01J 2972

Patent

active

040817229

ABSTRACT:
A modulator stage of a switched vertical deflection amplifier produces pulse width modulated gating signals obtained by modulating horizontal rate pulses including a ramp portion at a vertical deflection rate. The gating signals control switches coupled between a source of horizontal retrace pulses and a capacitor for charging the capacitor with decreasing and increasing amounts of energy during respective first and second intervals during each vertical trace interval for producing a sawtooth current in a vertical deflection winding coupled to the capacitor. A generator adds a nonlinear component to the ramp portions of the horizontal rate pulses for altering the gain of the amplifier during the vertical trace interval for producing a scanning current with a desired degree of linearity.

REFERENCES:
patent: 3452244 (1969-06-01), Dietz

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