A high voltage transformer device in a horizontal deflection circuit supplying an extra high tension (EHT) to the anode of cathode-ray tube, which comprises a low-voltage coil (primary winding) and a high-voltage coil (secondary winding) including a high-voltage side winding and a low-voltage side winding, wherein the high-voltage side winding of the high-voltage coil is more closely magnetically coupled to the low-voltage coil than the magnetic coupling between the low-voltage side winding of the high-voltage coil and the low-voltage coil, thereby suppressing variations of the high voltage output, and improving the trackability of the focusing voltage when a focusing coil is additionally provided.

Deflection circuit for regulating the high voltage load

High voltage transformer device in a horizontal deflection circuit

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.

High voltage generating circuit

A high voltage generator suitable for use in a television receiver set wherein a frequency dependent attenuation circuit is connected to a primary winding of a flyback transformer which generates a high voltage to be supplied to a CRT whereby a regulation for a high voltage is improved

High voltage generator

In a high voltage circuit of a color television receiver, constructed such that the voltage of the secondary winding of a fly-back transformer is converted into high DC voltages by an n-ple voltage rectifier, and that the output voltage Eb of the n-th stage of the rectifier circuit is applied to the phosphor screen of a post-deflection focusing type or after-focusing type Braun tube, while the output voltage Em of the m-th stage (m < n) is applied to the shadow mask thereof, a high voltage circuit wherein a voltage stabilizing element is incorporated between the output terminal of the n-th stage of the n-ple voltage rectifier circuit and ground, and current is kept steadily flowing through the element, whereby the ratio between the voltages Eb and Em, that is Eb/Em, is held substantially constant against load fluctuations in the n-ple voltage rectifier circuit.

High voltage circuit of color television receiver

A flyback EHT and sawtooth current generator for television display apparatus including a transformer and switching means connected thereto which are conducting during a scan period and are non-conducting during a flyback period, and reactances whether parasitic or nuts connected to the transformer which together with the transformer constitute a network having a minimum of three prescribed resonant frequencies during the flyback so that a scan which is substantially without any oscillations and a flyback EHT pulse having a wide and flat peak is produced

Deflection circuit for regulating the high voltage load

Citations

High voltage transformer device in a horizontal deflection circuit

High voltage generating circuit

High voltage generator

High voltage circuit of color television receiver

Flyback eht and sawtooth current generator having a flyback period of at least sixth order

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