Vertical deflection output circuit

Details Vertical deflection output circuit Vertical deflection output circuit

1977-04-15

1979-11-27

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315411, H01J 2970

Patent

active

041763025

ABSTRACT:
A pair of output transistors forming a single-ended push-pull circuit are alternately turned on and off at a vertical cycle to supply a vertical deflection current to a vertical deflection yoke. A low voltage winding is wound on a horizontal flyback transformer connected to a horizontal output transistor. First and second rectifying circuits are provided for rectifying and filtering a horizontal scan period portion and a horizontal flyback portion, respectively, of the voltage developed across the winding, and d.c. outputs of the rectifying circuits are fed to the push-pull circuit as operating power therefor. The first rectifying circuit includes a capacitor-input filter circuit while the second rectifying circuit includes a choke-input filter circuit, a critical current of which choke-input filter is established between a maximum current and a minimum current required for the push-pull circuit.

REFERENCES:
patent: 3758813 (1973-09-01), Kitamura
patent: 3845352 (1974-10-01), Newman et al.
patent: 3970780 (1976-07-01), Minoura

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