High voltage generating circuit
AssigneeSony Corporation
InventorsHiroshi Sahara, Tamiji Nagai
Life of this patent
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Abstract
A high voltage generating circuit for a television receiver including a flyback transformer having primary and secondary windings which are loosely coupled to achieve substantial operational isolation therebetween. The secondary winding has a diode rectifying circuit coupled thereto for developing the high voltage signal which is applied to the anode of the television receiver. A tertiary winding is provided which is tightly coupled to the secondary winding and which has a capacitor in parallel therewith to form a resonant circuit which is resonant at a frequency somewhat higher than the horizontal sweep frequency applied to the deflection coil of the television receiver.
Claims8
A high voltage generating circuit comprising:
- a horizontal oscillator developing an output signal at the horizontal sweep frequency;
- a flyback transformer;
- means for coupling the horizontal oscillator output to the primary of said flyback transformer;
- the primary and secondary windings of said flyback transformer being coupled loosely to provide substantial isolation therebetween;
- circuit means causing the input resonant frequency of said flyback transformer to be in the vicinity of and higher than the frequency of said horizontal oscillator;
- the secondary winding of said flyback transformer developing a substantially sinusoidal voltage having its peak portion flattened;
- and
- means associated with said secondary winding for rectifying said sinusoidal voltage to produce a regulated high voltage DC signal thereof.
Dependencies are inferred from the claim text.