Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1981-05-29
1983-11-15
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315411, 358190, H01J 2970, H01J 2976
Patent
active
044158416
ABSTRACT:
A ferroresonant power supply for a television receiver includes a saturable reactor having a magnetizable core and a winding located thereon. Exciting current for the saturable reactor is developed from a source of unregulated input voltage. A magnetic flux is generated in the magnetizable core that links the reactor winding to develop an alternating polarity output voltage. A capacitor develops a circulating current that generates a magnetizing force in a core section associated with the reactor winding. A permanent magnet biases the core to produce a second magnetizing force in the associated core section. The resultant of the two magnetizing forces develops a magnetic flux that substantially saturates the magnetizable material of the associated core section during each cycle of the alternating polarity output voltage to regulate the output voltage. The permanent magnet biasing provides temperature stability of the output voltage in that the tendency of the output voltage to vary with temperature variations in the magnetizable material of the associated core section is substantially offset by the accompanying temperature variations of the biasing strength of the permanent magnet. A high voltage generator of the television receiver is responsive to the regulated alternating polarity output voltage to produce a temperature stable, regulated ultor voltage at a picture tube ultor terminal.
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Clayburn Randall C.
Willis Donald H.
Blum Theodore M.
Laks Joseph
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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