Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1988-03-29
1989-09-19
Tarcza, Thomas H.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
315408, H01J 2970
Patent
active
048684660
ABSTRACT:
During a power-up mode of a television receiver power supply, a first run supply voltage is generated by rectifying a retrace voltage in a flyback transformer of a horizontal output stage of the television receiver. The rectified voltage is coupled through a resistor and a diode to a power supply voltage receiving terminal of a load circuit. A voltage regulator that includes a pass transistor regulates the voltage at the terminal during both the power-up and standby modes. During the power-up mode, when the ambient temperature is higher than during the standby mode, the current in the transistor is lowered, as a result of a current that is coupled to the terminal via the diode. This reduces the power dissipation in the transistor during the power-up mode. A second transistor, having a base electrode that is coupled to the anode of the diode, generates a second run supply voltage that is temperature compensated at an emitter electrode of the transistor.
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patent: 4532457 (1985-07-01), Haferl
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patent: 4761723 (1988-08-01), Lendaro
A service manual entitled Color Television Basic Service Data for RCA television chassis CTC 111 series published by RCA Corporation, Consumer Electronics, Indianapolis, Ind., dated 1981, FIGS. 31, 32 and the cover sheet being enclosed.
Copending U.S. patent application No. 014,855 entitled Power Supply Regulator for Television in the name of Lendaro, the applicant of the above-captioned patent application, filed 2/27/87.
Cain David
Henig Sammy S.
Laks Joseph J.
RCA Licensing Corporation
Tarcza Thomas H.
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