High voltage stabilization circuit for video display apparatus

Details High voltage stabilization circuit for video display apparatus High voltage stabilization circuit for video display apparatus

1988-06-06

1989-03-14

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

358190, 358243, H01J 2970

Patent

active

048127205

ABSTRACT:
A deflection circuit output stage generates in a deflection flyback resonant circuit a first flyback voltage at a horizontal frequency. A switch generates in a second flyback resonant circuit a second flyback voltage at the horizontal frequency having a phase relative to that of the first flyback voltage that is controllable. The first and second flyback voltages are summed and applied to a voltage tripler that produces an ultor voltage. A control circuit varies the phase of the second flyback voltage in a negative feedback manner that stabilizes the ultor voltage over a wide range of beam current variations.

REFERENCES:
patent: 4227125 (1980-10-01), Bohringer
patent: 4232254 (1980-11-01), Haferl
patent: 4245180 (1981-01-01), Rilly et al.
patent: 4645990 (1987-02-01), Willis

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