Abstract: A precision regulated power supply for charging an energy storage capacitor wherein regulation is achieved using a triac to interrupt a connection between a primary winding of a transformer and a DC power source. The circuit is useful in a power supply for a photocopier flash lamp where precision regulation of light intensity is required. A control winding is wound on the transformer closely coupled to the power secondary winding. A triac is connected across the control winding such that the winding can be short circuited when it is desired to cease charging of the storage capacitor. Short-circuiting of the control winding collapses the voltage on the transformer secondary winding thereby inhibiting the flow of current in the secondary winding. Regulating circuitry senses the voltage on the capacitor and gates the control winding triac into conduction when that voltage reaches a desired magnitude.

Abstract: A feedback loop is provided within an inverter feedback control system for modifying reference voltage to effect modifying output voltage from the inverter circuit thereby to maintain constant average rectified resistive current to a complex load, compensating for variations in load current which result from a changing characteristic of the complex load.

Abstract: A high-voltage capacitor, particularly for use in a voltage divider, is made from a high-voltage lead cable and a metallic component surrounding the cable for some distance along the length thereof, the metallic component being fixedly secured to a printed circuit board. The cable center conductor serves as the first capacitor plate while the metallic component serves as the second plate. In another aspect, the high voltage capacitor described above is incorporated into a high-voltage divider assembly which includes a voltage divider resistor assembly and a low-voltage capacitor.