Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1975-10-16
1977-08-09
Wilbur, Maynard R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
315399, 315405, 358190, H01J 2970
Patent
active
040413551
ABSTRACT:
A high voltage generating circuit for a television receiver which includes a horizontal oscillator and a switching circuit operating at the horizontal sweep frequency of the television receiver and being coupled to a flyback transformer which has an input resonant frequency in the vicinity of but higher than the horizontal oscillator frequency. The output of the flyback transformer is coupled to a rectifier circuit which in turn is coupled to the high voltage anode of the television receiver. The flyback transformer also has an input resonant circuit which includes a capacitor which is serially connected to the primary winding of the flyback transformer. This series resonant circuit is resonant at a frequency in the vicinity but less than the frequency of the horizontal oscillator with the result that improved voltage regulation is obtained while avoiding excess high voltage which otherwise would be caused by a shift in the output frequency of the horizontal oscillator.
REFERENCES:
patent: 3500116 (1970-03-01), Rietveld et al.
patent: 3920892 (1975-11-01), Dietz
Blum T. M.
Sony Corporation
Wilbur Maynard R.
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