Abstract: An improved regulated flyback high DC voltage output supply, particularly adapted for providing the anode voltage to a CRT, includes a flyback transformer having its output winding connected to a improved regulator of the type including a string of transistors used to provide a correction signal for stabilizing the output of the supply. The regulator also includes a plurality of Zener diodes, each connected in parallel with a corresponding one of the transistors for providing surge protection for the transistors and for providing an alternate current path to the corresponding transistor, depending on the level of the correction signal.

Abstract: A power converter, particularly adapted for supplying high voltage power for a CRT, for converting an unregulated level of input power to a regulated level of output power is described. The power converter includes a self-excited sinusoidal power oscillator comprising a transformer which has a secondary winding that resonates at a resonating frequency in response to the input signal and a field effect transistor connected to operate as a Class C amplifier. The field effect transistor is connected so that both the drain and gate voltages can both be provided by the primary windings of the tranformer and oscillate at the resonant frequencies so that the positive peak gate voltage can be used to control the output of the power oscillator, which in turn controls the power output of the converter. The gate of the FET is connected to a control bus which in turn can be connected to controls for controlling the control signal in accordance with any one of a plurality of control conditions.

Abstract: This disclosure is concerned with adapting very high-voltage, low-current, high impedance power source circuits, such as CRT anode supplies and the like, to employ the efficiency over wide input voltage ranges and other advantages, including small size, of switching-mode operation through combining variable frequency (or period) output control circuitry with resonant high-voltage transformers, wherein the transformer resonant frequency is rendered comparable to the desired range of conversion frequencies; and in which resonant flyback circuit operation drives a voltage multiplier such as to accommodate the resonance caused by the stray capacitance shunting its storage inductance.