Generator for producing a d.c. supply voltage in a television re

Details Generator for producing a d.c. supply voltage in a television re Generator for producing a d.c. supply voltage in a television re

1980-11-28

1984-01-10

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315393, 315411, H01J 2970, H01J 2976

Patent

active

044255330

ABSTRACT:
The current which passes through the vertical deflector of a transistorized color television receiver is produced by a circuit comprising an active switch controlled and modulated at the line frequency and supplied by line retrace pulses delivered by the secondary winding of a line transformer. The voltage at the terminals of an assembly compring a capacitor in series with the vertical deflector has a constant sign which is independent of the current passing through the deflector. The same secondary winding of the line transformer supplies both the vertical scanning circuit and a rectifier circuit for producing a d.c. voltage, in particular for the supply of video amplifiers.

REFERENCES:
patent: 3868538 (1975-02-01), Blanchard
patent: 4034262 (1977-07-01), Dietz
patent: 4322663 (1982-03-01), Rilly

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