Side pincushion correction circuit

Details Side pincushion correction circuit Side pincushion correction circuit

1974-04-18

1976-03-23

Farley, Richard A.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315411, H01J 2956

Patent

active

039462749

ABSTRACT:
Horizontal rate energy obtained from a winding of the horizontal output transformer of a deflection system is rectified for providing operating current for the vertical deflection output stage. A variable impedance is in shunt with a coil which is in series with a rectifier coupled to the transformer winding. The impedance is controlled by a parabolic vertical rate waveform to alter the charging rate of a storage capacitor coupled to the rectifier for supplying the vertical operating current. The parabolically varying rectifier current alters the loading of the horizontal transformer and thereby alters the horizontal scanning current at a vertical rate in a manner to correct for side pincushion distortion.

REFERENCES:
patent: 3571653 (1971-03-01), Hansen et al.
patent: 3648099 (1972-03-01), Otten et al.
patent: 3700958 (1972-10-01), Haferl

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