Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Plural load device systems
Patent
1987-02-27
1988-08-23
Miller, Stanley D.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Plural load device systems
315 94, 315105, H01J 1982, H05B 3900
Patent
active
047663901
ABSTRACT:
A video apparatus capable of operating at different line deflection frequencies incorporates a CRT electron gun assembly heater supply voltage circuit that maintains a constant rms voltage level independent of the line deflection frequency. The heater supply includes a transformer winding located on the line deflection driver transformer. The duty cycle of the developed AC voltage waveform remains substantially constant independent of the line deflection frequency, so that the AC voltage may be applied to the heater circuit.
REFERENCES:
patent: 3798369 (1974-03-01), Dietch
patent: 3956669 (1976-05-01), Del Ciello
patent: 4481476 (1984-11-01), Ferritsen
Osman Peter D.
Wharton James H.
Callahan Timothy P.
Henig Sammy S.
Laks Joseph J.
Miller Stanley D.
RCA Licensing Corporation
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