Abstract: A stabilized high voltage power supply circuit in a cathode-ray-tube using electromagnetic deflection. A secondary side of a transformer for controlling high voltage is connected with and arranged at a primary side of a flyback transformer. Further a controlling circuit is connected with and arranged at the primary side of the transformer for controlling high voltage. The controlling circuit comprises an operational amplifier for outputting direct current in accordance with a voltage difference between a predetermined reference voltage and a feedback voltage in a high voltage output, a first transistor for base-inputting rectangular wave forms generated at a primary side in a transformer for controlling high voltage and connecting an output of said operational amplifier with an emitter and a second transistor for controlling a primary coil current in said transformer for controlling high voltage in accordance with ON/OFF in the first transistor.

Abstract: The objects of the present invention are achieved by forming a high voltage generating circuit which comprises: a flyback transformer having a primary winding and a secondary winding; means for supplying pulses of first frequency to the primary winding; a smoothing capacitor connected across the secondary winding; an output line connected to one terminal of the smoothing capacitor; means for detecting a variation of high voltage on the output line to generate compensating voltage pulses of a second frequency which is higher than the first frequency for compensating the variation of high voltage to supply the compensating voltage pulses to the other terminal of the smoothing capacitor. Additionally, a low pass filter is connected between the other terminal of the smoothing capacitor and the secondary winding, which prevents the compensating voltage pulses from being supplied to the secondary winding.

Abstract: In a flyback transformer having a focus pack, in order to facilitate the manufacture and assembly of the focus pack, the focus pack mounted on the flyback transformer is constituted by an outer case portion and an inner case portion, and the outer and inner case portions are coupled to each other by a coupling portion and integrally formed. The inner case portion contains a circuit board having a resistor circuit for setting a focus adjusting voltage and a screen adjusting voltage. A focus insertion hole and a screen insertion hole are formed in the coupling portion. A focus shaft for variably setting a focus adjusting voltage is rotatably fitted in the focus insertion hole. A screen shaft for variably setting a screen adjusting voltage is rotatably fitted in the screen insertion hole. An insulating casting resin is injected between the gaps between the outer and inner case portions.

Abstract: A TV/radio converter using the common power supply having remocon circuit including main power taking-out device in which applied AC power make main power be applied to the next stage through switching-mode power components and dc-converting components, the device includes; a constant voltage device coupled in the output stage of the switching-mode power components and DC-converting components, wherein the output of the switching mode power components drives the microcomputer (MICOM) and can apply the constant voltage to the next stage, a main power control device, wherein the output of the MICOM controls the input power of horizontal driver components through active components in company with the output of the constant voltage device, thereby controlling the driving power of the TV and radio, and a driving device of a radio, wherein the radio operation can be carried out by driving the switching components using the output of the main power control device and the static voltage device after the active compon

Abstract: An auto scan horizontal deflection apparatus comprising a voltage detecting circuit as an amplitude detecting winding arranged at a secondary side of a choke transformer and detects amplitude of a flyback pulse. A frequency discriminating circuit (frequency/voltage converting circuit) discriminates frequency of horizontal synchronizing signal, and a control signal generating circuit (adding circuit) generates a control signal controlling the power source voltage of a variable power circuit supplying a power source voltage to a horizontal output circuit through a primary winding of the choke transformer on the basis of the outputs of both circuits.

Abstract: In a high voltage generator including a flyback transformer having a low-voltage coil and a high-voltage coil, a first switching element is disposed in a current path between a drive power source, the low-voltage coil and ground. The first switching element is turned on and off so as to charge and discharge a resonance capacitor, thereby generating flyback pulses. An output voltage of the high-voltage coil is detected. A peak value of the flyback pulse is controlled based on the detected output voltage so as to stabilize the output voltage of the high-voltage coil. A second switching element is located in the current path between the drive power source, the low-voltage coil and ground. The second switching element is turned on the moment the first switching element is turned off, thereby transferring electrical energy stored in the low-voltage coil to the resonance capacitor.

Abstract: A voltage regulator for a flyback-type high voltage supply having: a pulse transformer with its secondary interconnected in series with the primary of a flyback transformer; a control circuit for sensing the generation of a flyback pulse, a reference voltage, and a feedback voltage signal appearing at the output of the flyback transformer; and a switch for selectively applying energy to the primary of the pulse transformer while uniformly maintaining the flow of current through the primary of the flyback transformer.

Abstract: A television receiver has a switched mode power supply for regulating output voltages including the B+ output to a flyback transformer, by generation of output pulses to a power transformer. A controller for the power supply is coupled in two feedback loops, one responsive to a pulse width modulator coupled to the flyback transformer and the other comparing the output voltage with an internal reference for free running operation. The first feedback loop takes precedence and is active in the run mode of the television receiver. In the standby mode when horizontal rate pulses are absent, the second feedback loop takes over. The second feedback loop has a different reference level than the first, such that when switching from the run mode to the standby mode a transition interval occurs in which no pulses are output by the controller, thereby causing the B+ voltage to the flyback transformer to fall.

Abstract: A stray emission prevention circuit for a system having a cathode ray tube including a charging and discharging section for applying a system power supply voltage upon power-on of the system to charge with a constant voltage and for discharging the charged voltage upon power-off of the system, and a switching section for forming an open circuit between a high voltage unit of the cathode ray tube and a ground upon the power-on of the system and forming a closed circuit therebetween upon the power-off of the system to discharge the residual high voltage in the cathode ray tube, the circuit being provided on a circuit board of the system.

Abstract: In a television receiver, an ultor accelerating potential or high voltage for a picture tube is derived by rectifying a retrace pulse voltage developed in a high voltage winding of a flyback transformer. The retrace pulse voltage is developed by a horizontal deflection circuit output stage that is coupled to the high voltage winding via a primary winding of the flyback transformer. The horizontal deflection circuit output stage includes a horizontal deflection winding, a retrace capacitor and a trace switch. The trace switch includes a damper diode and a horizontal output transistor. An energy storage coil is coupled in parallel with a third winding of the flyback transformer during a controllable time interval beginning during the second half of horizontal trace and ending during retrace. The energy stored in the coil during the trace portion is transferred to the flyback transformer during retrace to enhance high voltage at high beam currents.

Abstract: An adaptive feed forward control circuit and power supply for a television comprises a circuit for supplying energy from a source to a load, the load having energy requirements which vary in response to an input signal, for example a video signal. A feedback circuit generates a first correction signal indicative of a difference between an operating voltage or current level and a reference level. A neural network generates a second correction signal indicative of anticipated energy requirement variation by processing information in present values of the input signal. A control circuit, for example a pulse width modulating circuit, is responsive to the correction signals for controlling operation of the energy supplying circuit. The first and second correction signals are combined by a summing circuit. The neural network comprises a first signal adaptive circuit for the input signal and a second signal adaptive circuit for a processed version of the input signal.

Abstract: A television apparatus has a horizontal deflection circuit with a transformer for developing a derived secondary power source. A circuit for disabling the horizontal deflection circuit is responsive to a fault condition in the horizontal deflection circuit. A driver stage in a vertical deflection circuit is energized by the secondary power source for supplying vertical deflection current to a vertical deflection yoke. An S-shaping capacitor is coupled in series with the vertical yoke. A circuit for sensing vertical yoke current includes a sampling resistor coupled in series with the vertical yoke and the S-shaping capacitor. The vertical yoke current sensing circuit generates a feedback signal for controlling the vertical deflection circuit during normal operation and generates a fault signal indicative of an overcurrent condition in the vertical yoke. Indication of the overcurrent condition is calibrated to be indicative of fault conditions in the vertical driver stage and/or in the S-shaping capacitor.

Abstract: In a television receiver the voltage applied to the loudspeaker from the audio amplifier is low pass filtered and coupled to a threshold detector. Normal audio is attenuated so that the detector is not tripped, but steady DC is passed through the filter and trips the detector. The output of the detector is coupled to the X-ray protection circuit of the receiver which acts to shut the receiver "off".

Abstract: A flyback transformer operable over a broad frequency range is used as a regulated high voltage power supply. A ringless, layer-wound transformer is operated far below its natural resonant frequency in response to a pulse width modulator which may be synchronized with a video display in order to prevent beat frequency images in a video display. Diodes are coupled between the layers of windings to reduce the leakage inductance and stray capacitance. The supply is particularly suitable for TV or monitor use but not exclusively, so any apparatus requiring a regulated high voltage supply may use the invention.

Abstract: The anti-horizontal-impulse cathode-ray-tube driving system comprising an added coil disposed at a location corresponding to the primary coil of the horizontal output transformer thereof, said added coil having one end connected to the output terminal of an anode high voltage generator and an opposite end connected to the anode of the cathode-ray-tube to be driven, and being controlled to produce an induced voltage of reversed phase in countervailing the capacitor formed between the anode and the earthed graphite of the cathode-ray-tube. Under the process of capacitive coupling, the horizontal impulse, which is produced at the anode high voltage, is eliminated from forming an alternating electrical field around the cathode-ray-tube.

Abstract: A flyback transformer constituted such that a focus pack incorporating a circuit board having a resistor circuit including a variable resistor for focus voltage supply is mounted on a transformer case, comprising an outer case to be mounted on a transformer case, and an inner frame, formed inside the outer case to be integral with the outer case for incorporating the circuit board, wherein an opening path is formed between the outer case and the inner frame, a shaft hole extending through the opening path is provided for the outer case and the inner frame, the shaft hole is defined from the opening path by an insulating cylinder wall, and a rotational operation shaft for the variable resistor is inserted in a cylinder hole of the insulating cylinder wall.

Abstract: A power supply circuit for a CRT display device includes a low-voltage power supply switching circuit for supplying power to a horizontal oscillation circuit of the CRT display device, and a high-voltage power supply switching circuit for supplying power to high-voltage circuits of the CRT display device. The low-voltage power supply switching circuit includes an oscillator and a switching transistor. The oscillator is triggered by an output of the horizontal oscillation circuit, and the conductive state of the switching transistor is controlled according to an output of the oscillator. The high-voltage power supply switching circuit includes a switching transistor. The conductive state of the switching transistor of the high-voltage power supply switching circuit is controlled according to an output of the low-voltage power supply switching circuit.

Abstract: A method and circuit for preventing excessive CRT X-ray production by continually measuring operating parameters of the CRT that are correlated with X-ray production during this operation. The measured parameters are continually compared with predetermined limit values, and various CRT operation controls are adjusted in response to the comparison to maintain the measured parameter values below the predetermined limit values.

Abstract: The present invention relates to a power supply device adapted for various electric or/and electric instruments. The present invention generates lower voltages during a standby mode except for power to a microcomputer, using a frequency-dividing circuit and provides the normal output voltages in operation mode to minimize the power consumption without a relay circuit.

Abstract: A protection circuit against an excessive current in a flyback transformer which supplies a high voltage to a CRT. A fuse and current detecting resistor are inserted on the line which supplies a current to the primary winding of the flyback transformer. The intermediate point of the primary winding and the node of the fuse and current detecting resistor are connected by a semiconductor switching element which becomes conductive when the voltage across the current detecting resistor reaches a certain high voltage. Accordingly, if an excessive current flows in the flyback transformer, the thyristor turns on, causing the fuse to be blown by the large current, whereby the current supply to the flyback transformer can be shut off.

Abstract: A television receiver high voltage generator includes a high voltage transformer for developing an ultor accelerating potential at an ultor output terminal. A flyback voltage produced in a winding of the transformer is rectified to produce an ultor accelerating potential representative DC voltage. A high voltage protection circuit comprises a comparator/amplifier stage that level shifts the ultor accelerating potential representative DC voltage and applies the level shifted voltage across a base-emitter junction of a first transistor. The first transistor is coupled to a second transistor to form a latch. When, as a result of excessive ultor accelerating potential, the latch becomes active, the generation of the ultor accelerating potential is disabled. The first and second transistors are interior to an integrated circuit; whereas, the comparator/amplifier stage is exterior to the integrated circuit.

Abstract: A boost capacitor has a first terminal that is coupled to a retrace capacitor of a horizontal deflection circuit. A diode couples a trace voltage in an S-shaping capacitor to the boost capacitor to charge the boost capacitor during trace. A second diode rectifies a voltage that is equal to the sum of the boost capacitor voltage and a retrace voltage developed in the retrace capacitor for generating a screen grid voltage for a cathode ray tube.

Abstract: A switched mode power supply and horizontal deflection system comprises a first oscillator circuit for generating horizontal rate synchronizing trigger pulses, having a voltage supply input terminal; a horizontal output stage; and, a second oscillator circuit for driving the output stage, operable at a horizontal rate responsive to the trigger pulses and free running at a different rate absent the trigger pulses. An overcurrent protection circuit for the horizontal output stage responds to an overcurrent condition which can occur during free running of the second oscillator circuit. A flyback transformer is coupled to the horizontal output stage and has a secondary side voltage supply coupled to the voltage supply input terminal for energizing the first oscillator circuit during operation of the output stage.

Abstract: A full reset flyback regulator includes a power transformer having a primary winding and at least one secondary winding coupled to a load. A single control winding on a primary side of the power transformer is coupled through control circuitry to a gate electrode of a switching device that is connected to the primary winding. The voltage polarity on the control winding alternates so that if the switching device is "ON" a drive voltage is provided on its gate electrode and if the switching device is "OFF" a bias voltage is provided to the error amplifier control circuit. Each cycle of the regulator is initiated via a sync pulse which is provided from the high voltage flyback transformer of a display or monitor subsystem.

Abstract: A horizontal deflection and high voltage regulation system for CRT displays and television receivers utilizes a single horizontal output transistor driving a conventional deflection yoke and high voltage transformer. A diode modulator and pulse width modulating system is coupled to the horizontal deflection yoke to provide control of horizontal scan size. A separate diode modulator and pulse width modulator is coupled to the horizontal transformer. A comparator is coupled to a resistive high voltage divider to produce an error voltage indicative of CRT anode voltage. The error voltage thus developed is applied to the diode modulator and pulse width modulator operative upon the high voltage transformer to control high voltage in response to changes of CRT beam current loading imposed thereon.

Abstract: There is disclosed a circuit for stablizing the high voltage of the high voltage generating circuit in a CRT according to the change of the horizontal oscillating frequency, comprising a diode, the cathode of said diode being connected to the intermediate terminal of a flyback transformer (FBT), the anode of said diode being connected to first resistor and a variable resistor, a first transistor, the base of the said first transistor being connected to the intermediate terminal of said variable resistor, a second transistor, a third transistor, the collector of said first transistor being connected through a grounded second resistor to the base of said third transistor, the collector of said third transistor being connected to the base of said second transistor, the collector of said second transistor being connected to a direct current source, and a fourth transistor, the emitter of said second transistor being connected through the primary coil of said flyback transformer to the collector of said fourth tra

Abstract: An ultor voltage power supply includes first and second transformer windings that are coupled in series for producing corresponding first and second flyback pulse voltages. A first protection circuit disables the generation of each of the pulse voltages when the amplitude of the first pulse voltage becomes excessive. A second protection circuit disables the generation of each of the pulse voltages when the amplitude of the second pulse voltage becomes excessive.

Abstract: A standby/run power supply and control circuit for a television apparatus comprises first and second sources of DC voltage, one of which is unswitched and available during a standby mode of operation and the other one of which is switched and available only during a run mode operation. A voltage regulator has an input coupled to both DC sources and has an output for supplying a regulated DC voltage at a first power level during the standby mode and at a second power level during the run mode. A first control circuit, such as a CMOS integrated circuit, is coupled to the regulated voltage output and operable in both the standby and run modes. A second control circuit, such as a second CMOS integrated circuit, is interconnected with the first control circuit, for example by a common control bus. The second control circuit is also coupled to the regulated voltage output, but is operable only during the run mode.

Abstract: An arrangement that compensates for a tendency in a raster width of a display screen of a video display or television to increase when a variation in a beam current occurs, decreases an amplitude of a deflection current to decrease in a nonlinear manner as a function of an increase in the beam current. At a low beam current, a given increase in the beam current produces a decrease in the amplitude of the deflection current that is substantially greater than caused by the same increase at a high beam current.

Abstract: To produce a cathode voltage of a cathode ray tube that provides black level compensation, a secondary winding of a flyback transformer is coupled in series with a resistor, a capacitor and a rectifying diode. During flyback, a voltage pulse is developed across the capacitor at a magnitude that is increases when the average value of the beam current increases. The voltage pulse causes the cathode voltage to first decrease when the beam current increases.

Abstract: A high voltage generator using a flyback transformer to generate high voltage pulses and including a control switching transistor inserted in a power supply circuit in a manner to be turned off during a trace interval. The amount of electric energy accumulated in a resonance circuit is intermittently controlled by the on-off action of such switching transistor, so that the level of the high pulse voltage outputted via the transformer can be maintained constant to consequently enhance the response characteristic in the voltage regulation while minimizing the number of required component elements.

Abstract: A high voltage stabilizing circuit comprises a high voltage generating circuit (FBT, D1) for boosting a pulse voltage (Vcp) generated from a horizontal deflection circuit (Q1, D2, Ct", Ly, Cs) during a flyback period of a horizontal deflection pulse, a flyback period control circuit (Q2, C.sub.B, Rv, Ct') for performing switching operation only during the flyback period to control the flyback period, so that the high voltage (HV) is controlled, and a switching control resistor (Rv) for controlling the period of its switching operation.

Abstract: An input signal at a horizontal frequency is coupled to a deflection circuit through an isolation transformer during a power-on operation but not during a power-off operation. A voltage at a horizontal deflection frequency is developed in a linearity inductor of the deflection circuit. The voltage in the linearity inductor is rectified to produce a rectified signal that is coupled to an input terminal of a regulator oscillator of a power supply. The rectified signal is coupled to the regulator oscillator in an electrically nonisolated manner with respect to electrical shock hazard isolation and is electrically isolated by the transformer from the input signal. The regulator oscillator generates trigger pulses for controlling the switching operation of an SCR switch of the power supply to produce an output supply voltage that energizes the deflection circuit.

Abstract: A flyback transformer includes a film wound unit which is composed of a first and second film sheets on which a first and second conductors are formed. A primary coil is formed by the first conductor, and a resonance capacitor which is connected to the primary coil is formed between the first and second conductors. A plurality of secondary coils are sequentially formed, and rectifying diodes are respectively connected between the respective secondary coils. Each of the secondary coils may be a metal plating coil.

Abstract: In a horizontal deflection and EHT generator circuit, the supply line is connected directly to one end of the primary winding of the EHT transformer through a series switching element, and a unidirectional element connects that end of the primary winding to the supply line to enable energy recovery to the supply line through the unidirectional element during and following retrace.

Abstract: A horizontal deflection circuit output stage generates a retrace pulse in a tertiary winding of a flyback transformer. A flyback pulse that is substantially wider than the retrace pulse is produced in a winding of a second transformer that is coupled in series with the tertiary winding such that the retrace pulse occurs when a peak portion of the flyback pulse is already relatively "flat". The amplitude of the flyback pulse is controlled in a negative feedback loop for stabilizing an ultor voltage.

Abstract: A base voltage of a regulator transistor is developed during normal operation in a filter capacitor coupled to a flyback transformer of a horizontal deflection circuit. After a transition to a standby mode of operation, the deflection circuit is disabled and the capacitor begins discharging. The emitter of the transistor is coupled to a load circuit. A supply voltage is coupled to the collector of the transistor during both standby and normal mode. To reduce the loading of a standby power supply that generates the collector voltage as along as the capacitor is not fully discharged, an active turnoff of the regulator transistor is provided immediately after the receiver goes into the standby mode of operation so as to actively turnoff the current drawn by the transistor.

Abstract: A horizontal deflection and high voltage generating circuit having a horizontal oscillating circuit, a horizontal excitation circuit responsive to an oscillating pulse outputted from the horizontal oscillating circuit, a horizontal output circuit excited by an output of the horizontal excitation circuit, a high voltage output circuit responsive to an oscillating pulse outputted from the horizontal oscillating circuit, which comprises a delay circuit for causing a lag to a leading edge of the oscillating pulse applied from the horizontal oscillating circuit to the horizontal excitation circuit with respect to a leading edge of the oscillating pulse applied from the horizontal oscillating pulse to the high voltage output circuit, the lag being a predetermined delay time, the value of which is set in such a manner that a trailing edge of a horizontal deflection pulse generated by the horizontal output circuit is substantially in agreement with a trailing edge of a high voltage pulse, which is generated by the hi

Abstract: A circuit arrangement for a picture display device for generating an essentially sawtooth-shaped line deflection current with a trace and a retrace through a deflection coil, which circuit arrangement comprises a series circuit of a trace capacitor, the line deflection coil and a bidirectionally conducting, line frequency-controlled switch which is conducting during the trace time and is not conducting during the retrace time, in which retrace time the deflection coil and a retrace capacitor are part of a resonant network. The series circuit also comprises a voltage source, while the losses in the series circuit are so low that the sum of the DC components of the voltage of the source and of the voltage across the trace capacitor is many times higher, at least 5 times, than the amplitude of the AC component of the source. The deflection current is given a desired variation by means of three controls.

Abstract: A switching power supply includes a switching transistor coupled to a winding of a first transformer for generating a collector current. The collector current is coupled in a current path that includes that winding and a primary winding of a power transformer. The collector current is coupled to the base of the switching transistor via the first transformer such that when the switching transistor is conductive, both the collector current and a base current of the transistor are upramping. When the transistor is nonconductive, a horizontal synchronizing signal is coupled via the first transformer to synchronize the base current.

Abstract: A video display monitor operable at different horizontal deflection frequencies incorporates a circuit that produces an electron gun control grid potential that compensates for screen grid potential changes due to changes in operating frequency. A sawtooth signal is generated that has a peak to peak amplitude determined in response to the deflection frequency. The sawtooth signal is peak detected to produce a direct voltage, for the control grid, that varies in response to the horizontal deflection frequency.

Abstract: The high voltage generating apparatus includes a flyback transformer to be employed in television equipment and has a circuit for stabilizing a high voltage output. This circuit comprises an additive voltage generating coil, a reference voltage generating circuit, a voltage detector, a comparison amplifier, a switching circuit and a voltage multiplying rectifier circuit. The reference voltage generating circuit generates an inclined voltage in the flyback time of the horizontal deflection cycle and the voltage detector detects a mode of the high voltage output. The comparison amplifier compares an inclined voltage and a detection voltage and generates a control signal. The switching circuit operates with the control signal. With this operation, an additive voltage generated by the additive voltage generating coil is supplied to the high voltage coil of the flyback transformer through the voltage multiplying rectifier circuit.

Abstract: A high voltage transformer for a video apparatus provides electrical isolation between the primary and secondary windings. The primary winding is wound on a first bobbin while the secondary windings are wound on a second separate bobbin that surrounds the first bobbin with the bobbin structure providing a physical isolation barrier. The high voltage winding is wound on a high voltage bobbin which fits over the primary and secondary bobbin structure.

Abstract: A voltage supply circuit for cathode ray tubes in which a horizontal drive pulse is supplied to a flyback transformer and a flyback pulse to be derived from the flyback transformer is supplied as a cathode voltage, a grid voltage and an anode voltage for a cathode ray tube, to provide a focus voltage regulation circuit for cathode ray tubes is disclosed wherein the flyback pulse to be derived from a part of the flyback transformer is rectified to obtain a direct current voltage which is in turn varied for application as a cathode voltage and/or a grid voltage or superimpose onto the anode voltage so that a potential difference between the cathode voltage, the grid voltage and the anode voltage is variably and relatively regulated.

Abstract: A television receiver in which a high voltage detection circuit detects the FBT output voltage which is supplied to the cathode ray tube, a comparison circuit compares the detected voltage with a reference voltage, and the supply voltage to the FBT is controlled by a control signal which represents the result of comparison. The control signal provided by the comparison circuit is also used to control the supply voltage to a drive circuit which injects base carriers to a high voltage generating transistor, so that a proper drive control takes place automatically depending on the load condition of the high voltage.

Abstract: A signal generator which generates an yoke signal for application to a horizontal yoke of a cathode ray tube (CRT) is presented. The signal generator receives a dc signal which indicates the width of the horizontal scan lines of the cathode ray tube and receives a pincushion correction signal. The signal generator includes a voltage source, a yoke current generator, a current feedback network, a summing circuit, an amplifier and a voltage regulator. The summing circuit sums the voltage of the dc signal and the pincushion correction signal. The current feedback network generates a first feedback signal with a first feedback signal voltage proportional to the peak value of current through the horizontal yoke. The amplifier generates a second feedback signal based on the difference in the voltage of the first feedback signal voltage and the summed voltage of the dc signal and the pincushion correction signal.

Abstract: A source-voltage controlling high voltage stabilizer for detecting the high voltage and controlling the source voltage, while providing a detector detecting the envelope of a horizontal deflection current, wherein the deflection current is stabilized as the voltage distribution of two scanning capacitors in a diode modulation type output stage and is so controlled that a coincidence is attained between the wave form of the output signal and that of the horizontal deflection current modulation signal. The source voltage supplied to the input side of the flyback transformer is controlled in such a manner that the high voltage obtained from the output side of the flyback transformer is maintained constant, and the circuit further has a variation detector for detecting the variation in the source voltage, wherein the detected variation component is applied to one of the junctions of the modulation coil.

Abstract: The high voltage power supply for the CRT display of a computer system is modified by the addition of tightly coupled, unitarily wound secondary windings feeding current to rectifier diodes oriented to conduct during the horizontal scan. These secondary windings and diodes provide a stable, regulated source of D.C. power for the remaining modules of the computer system.

Abstract: A power source device including a lower voltage inverter transformer having plural secondary windings and a higher voltage inverter transformer having a primary winding connected directly to one of the secondary windings of the lower voltage inverter transformer without any rectifying circuit or inverter circuit interposed therebetween. The lower voltage and higher voltage transformers are contained in the same casing, the internal space of which is filled with an electrically insulative material to provide a unit device.

Abstract: A high voltage regulator circuit for maintaining the ultor voltage applied to a picture tube of a television receiver apparatus provides an auxiliary voltage signal for compensation of variations in the ultor voltage caused by variations in the beam current. An improved phase control circuit controls the phase position of the pulses of the auxiliary voltage signal so that they lag with only the leading parts thereof overlapping the retrace voltage signal pulses, in order to prevent the introduction of fluctuations in the ultor voltage due to secondary ringing.