Side pincushion distortion correction circuit
AssigneeRCA Corporation
InventorPeter Eduard Haferl
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Abstract
A horizontal deflection generator provides scanning current in a deflection winding and a pincushion modulating circuit is coupled to the deflection winding for modulating the horizontal scanning current. A vertical deflection generator and the horizontal deflection generator are coupled by means to the modulating circuit for providing vertical rate signals and nonlinear horizontal rate signals to the modulating circuit for providing a vertical rate distortion correction signal component modulated by the nonlinear horizontal rate signals for reducing the side pincushion distortion.
Claims6
A side pincushion distortion correction circuit, comprising:
- a horizontal deflection winding;
- a horizontal deflection generator coupled to said deflection winding for supplying scanning current thereto;
- scanning current modulating means including a controllable switch coupled to said deflection winding;
- a vertical deflection generator;
- means coupling said vertical generator to said modulating means for controlling said switch for providing modulation of said scanning current at said vertical rate;
- and
- means coupling said horizontal generator to said modulating means for producing nonlinear horizontal rate signals for controlling said switch for providing a combined nonlinear horizontal rate and a vertical rate modulation of said scanning current in a manner for reducing said side pincushion distortion.
Dependencies are inferred from the claim text.