Horizontal deflection circuit

Details Horizontal deflection circuit Horizontal deflection circuit

1989-01-13

1990-01-30

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2970, H01J 2976

Patent

active

048975818

ABSTRACT:
A horizontal deflection circuit which including a horizontal output transistor; a damper diode connected in parallel with the horizontal output transistor; a resonant capacitor connected in parallel with the damper diode; a horizontal deflection coil connected in parallel with the horizontal output transistor; and a series resonant circuit connected in parallel with the resonant capacitor. The series resonant circuit is constituted by a series connection of a capacitor and an inductor to perform composite resonance in cooperation with the resonant capacitor. The capacitor and the inductor of the series resonant circuit are designed to have a tertiary resonant frequency. The composite resonance by means of the series resonant circuit and the resonant capacitor enables the top of the flyback pulse to be flattened, so that the waveform of the flyback pulse becomes near the form of rectangular wave. Accordingly, a horizontal deflection circuit having higher retracing capacity can be provided through the same horizontal output transistor as generally used in the prior art.

REFERENCES:
patent: 3769542 (1973-10-01), Pieters
patent: 4227123 (1980-10-01), Dietz

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