Voltage booster for CRT electrode supply

Details Voltage booster for CRT electrode supply Voltage booster for CRT electrode supply

1991-06-12

1992-05-05

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Power supply from deflection circuit source

315408, 3153821, H01J 2970

Patent

active

051111217

ABSTRACT:
A boost capacitor has a first terminal that is coupled to a retrace capacitor of a horizontal deflection circuit. A diode couples a trace voltage in an S-shaping capacitor to the boost capacitor to charge the boost capacitor during trace. A second diode rectifies a voltage that is equal to the sum of the boost capacitor voltage and a retrace voltage developed in the retrace capacitor for generating a screen grid voltage for a cathode ray tube.

REFERENCES:
patent: 2783413 (1957-02-01), Smith
patent: 3931548 (1976-01-01), Barchok
patent: 4144480 (1979-03-01), Nagasaki et al.
patent: 4649325 (1987-03-01), Guerin et al.
patent: 4692669 (1987-09-01), Black et al.
Allowed U.S. patent application Ser. No. 508,438, filed Apr. 13, 1990, in the name of Lendaro, entitled, A Power Supply for an Electrode of a CRT.

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