Low cost, high speed, high voltage flyback regulator circuit

Details Low cost, high speed, high voltage flyback regulator circuit Low cost, high speed, high voltage flyback regulator circuit

1988-06-30

1989-07-04

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, 358243, 363 21, H01J 2970

Patent

active

048454109

ABSTRACT:
A conventional flyback type deflection system develops a high DC voltage that is sensed by a small potentiometer connected in series with a bleeder resistor coupled across the flyback winding. A differential amplifier compares the sensed voltage with a reference voltage and drives a voltage controlled oscillator, which develops a pulse output whose frequency is a function of the sensed voltage. The VCO drives a FET that in turn controls current flow through a small flyback coil arrangement. The output of the coil arrangement is rectified and a DC compensating voltage is developed across a capacitor that is coupled in series with the high voltage flyback winding.

REFERENCES:
patent: 4642744 (1987-02-01), Thomas
patent: 4656399 (1987-04-01), Testin et al.
patent: 4737694 (1988-04-01), Dietz

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