Side pincushion correction circuit with low dissipation damping

Details Side pincushion correction circuit with low dissipation damping Side pincushion correction circuit with low dissipation damping

1977-08-04

1978-12-19

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, H01J 2956

Patent

active

041307836

ABSTRACT:
A side pincushion correction circuit includes an impedance circuit coupled in series with the horizontal deflection coil. A switch coupled across at least a part of the impedance circuit is closed at a time during the retrace interval which is progressively advanced during a first portion of the horizontal retrace interval and progressively retarded during a second portion. Damping of the impedance circuit is provided by a second switch operated at a rate synchronous with the first. The second switch is coupled between a point of the impedance circuit and a voltage source.

REFERENCES:
patent: 3944879 (1976-03-01), Suzuki
patent: 4019093 (1977-04-01), Klein

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