Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1981-11-16
1983-06-07
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
358190, H01J 2970
Patent
active
043873243
ABSTRACT:
In a television receiver regulated power supply that is responsive to the state of a remote on/off command signal, the AC mains supply voltage is connected to the input terminals of a bridge rectifier through the mechanical switch portion of an on/off relay. A remote control circuit energizes the relay coil to close the mechanical switch upon receipt of the on-state command signal. The bridge rectifier then develops an unregulated DC voltage that is applied to a high frequency inverter for developing an alternating polarity input voltage. The alternating polarity input voltage is applied to a self-regulating or ferroresonant power supply circuit to produce regulated output voltages for various television receiver load circuits such as the ultor load and the horizontal deflection circuit. During a fault operating condition of the self-regulating circuit wherein the output voltages would tend to increase excessively, a protection circuit detects the occurrence of the fault operating condition and disables the remote control circuit to deenergize the relay coil and open the mechanical on/off switch. Operation of the self-regulating circuit stops to thereby deenergize the television receiver load circuits.
REFERENCES:
patent: 2913621 (1959-11-01), Luther, Jr. et al.
patent: 3860748 (1975-01-01), Everhart et al.
patent: 3949403 (1976-04-01), Yoshida et al.
patent: 4024577 (1977-05-01), Diethelm
patent: 4234829 (1980-11-01), Willis
Blum Theodore M.
Laks Joseph
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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