Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid state switching devices and provides protection against failure of the switching devices due to transient voltage spikes. The high-voltage protection circuit includes an inductor intercoupled with a high-voltage clamp, such as a series of solid state current conducting devices in parallel with the inductor. The protection circuit further includes a diode connected in parallel with the capacitor for preventing the voltage across the regulator circuit from reversing polarity. A shielded voltage divider may further be provided to accurately measure the voltage output and produce feedback control signals. Still further, a discharge module may be provided on high-voltage cables connecting the regulator circuit to the X-ray tube in order to discharge any capacitive voltage remaining on the cables between pulses, in order to eliminate any tail on the output waveform.

Abstract: A plurality of phototransistors are connected in a matrix of rows and columns. Light falling on the phototransistors discharges the interelectrode capacitance between the emitter and collector of each phototransistor. Each phototransistor is permitted to discharge for a given period of time. A current source then charges the interelectrode capacitance back to its original level. The amount of time taken to recharge the interelectrode capacitance is a function of the intensity of the light falling on that phototransistor.

Abstract: A plurality of phototransistors are connected in a matrix of rows and columns. Light falling on the phototransistors discharges the interelectrode capacitance between the emitter and collector of each phototransistor. Each phototransistor is permitted to discharge for a given period of time. A current source then charges the interelectrode capacitance back to its original level. The amount of time taken to recharge the interelectrode capacitance is a function of the intensity of the light falling on that phototransistor.

Abstract: A power supply for an X-ray tube having a feedback loop for regulating the high-voltage output signal of the power supply and allowing operation from AC lines of different voltage characteristics. The single-phase components of the input AC line voltage pass through separate silicon controlled rectifiers before being applied to a step-up transformer. The high-voltage transformer output is monitored by a shielded resistor divider and processed to produce a low-voltage control signal for controlling the input rectifiers.