Line deflection circuit arrangement for a picture display device

Details Line deflection circuit arrangement for a picture display device Line deflection circuit arrangement for a picture display device

1989-12-04

1991-02-05

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315387, 315408, H01J 2970, G09G 104

Patent

active

049908340

ABSTRACT:
A circuit arrangement for a picture display device for generating an essentially sawtooth-shaped line deflection current with a trace and a retrace through a deflection coil, which circuit arrangement comprises a series circuit of a trace capacitor, the line deflection coil and a bidirectionally conducting, line frequency-controlled switch which is conducting during the trace time and is not conducting during the retrace time, in which retrace time the deflection coil and a retrace capacitor are part of a resonant network. The series circuit also comprises a voltage source, while the losses in the series circuit are so low that the sum of the DC components of the voltage of the source and of the voltage across the trace capacitor is many times higher, at least 5 times, than the amplitude of the AC component of the source. The deflection current is given a desired variation by means of three controls.

REFERENCES:
patent: 3809947 (1974-05-01), Ambrico et al.
patent: 4547711 (1985-10-01), Gehrmann

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