High voltage generating circuit

Details High voltage generating circuit High voltage generating circuit

H - Electricity

04

N

350/105

H04N 3/18 (2006.01) H01F 38/42 (2006.01)

Patent

CA 1039399

ABSTRACT OF THE DISCLOSURE 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 output 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 fre- quency in the vicinity but less than the frequency of the horizontal oscil- lator 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. -1-

237657

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