Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1978-04-17
1979-05-08
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2970
Patent
active
041538625
ABSTRACT:
A self-regulating deflection circuit includes a first inductor and switching transistor coupled across the unregulated voltage supply. A damper diode, retrace capacitor and second inductor are coupled in parallel, and the parallel combination is coupled across the transistor by a first rectifier poled to prevent current from flowing from the first inductor to the second inductor. A second rectifier is coupled between the first and second inductors for transferring energy from the first inductor to the second during the retrace interval. A control circuit coupled to the second inductor and to the base of the switching transistor controls the time during the first half of the trace interval during which the transistor conducts to allow energy to be stored in the first inductor. A storage capacitor is coupled in series with the second rectifier. Charge accumulation on the storage capacitor and resultant blocking of the second rectifier is prevented by a resistor coupled across the storage capacitor.
REFERENCES:
patent: 3898523 (1975-08-01), Wessel
patent: 3906307 (1975-09-01), Hattum
patent: 3912971 (1975-10-01), Houkes
patent: 3912972 (1975-10-01), Stacker
patent: 3950674 (1976-04-01), Joosten et al.
patent: 4001607 (1977-01-01), Dietz
patent: 4024434 (1977-05-01), Joosten et al.
patent: 4099101 (1978-07-01), Teuling
"A New Horizontal Output Deflection Circuit" by Peter L. Wessel, IEEE Transactions on Broadcast and Television Receivers, vol. BTR-18, #3, Aug. 1972.
Hubler Malcolm F.
Meise William H.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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