High efficiency deflection circuit

Details High efficiency deflection circuit High efficiency deflection circuit

1975-03-31

1976-09-28

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, 315403, H01J 2970, H01J 2976

Patent

active

039834522

ABSTRACT:
A push-pull common emitter deflection output stage energized by a relatively low direct voltage includes zener diode drive coupling to its input circuit for reducing crossover distortion. A diode in series with a deflection winding disconnects the output stage from the winding during a portion of the retrace interval to allow the retrace pulse voltage to rise to a relatively high direct voltage supplied through a switched transistor only during the retrace interval to reduce power dissipation in the output stage. Current feedback from the deflection winding to a driver stage during trace and retrace intervals accurately determines the retrace duration.

REFERENCES:
patent: 3784857 (1974-01-01), Christopher
patent: 3887842 (1975-06-01), Owens, Jr. et al.

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