Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feedback control for real time monitoring and protection against failure due to excess current or voltage spikes. The apparatus includes a DC supply circuit utilizing a first feedback control loop and silicon controlled rectifiers to regulate the output of a high-voltage transformer. The apparatus further includes a regulator circuit utilizing a second feedback control loop and a series of FETs to produce a continuous or pulsed output of precise magnitude and phase. Shielded voltage dividers are provided to accurately measure the voltage outputs and produce feedback control signals. Discharge modules on the high-voltage cables connecting the power supplying X-ray tube discharge any capacitive voltage remaining on the cables between pulses, so as to eliminate any tail on the output waveform.

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 high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feed-back control for real-time monitoring and protection against voltage spikes. More specifically, the regulator circuit utilizes a feedback control loop and a series of FET to produce a continuous or pulsed output of predetermined duration and/or amplitude. Shielded voltage dividers are provided to accurately measure the voltage output and produce feedback control signals. The shielded voltage divider includes a plurality of paired conductive members disposed along the length of a resistor, which paired conductive members separate the resistor into separate portions and provide alternating first and second pairs of conductive members along the length of the resistor.

Abstract: Apparatus for supplying operating power to an X-ray generating source, wherein the source sends a radiation signal to a patient and a portion of the signal which passes through the patient is utilized to produce an image of the patient, the apparatus comprising a power supply which includes a mechanism for receiving a low-voltage input signal and a voltage transforming and combining mechanism for producing a high voltage signal; and a mechanism for monitoring the high-voltage supply signal, a mechanism for receiving the supply signal and regulating the duration or amplitude of the supply signal to produce a high-voltage regulated output signal for operating the X-ray generating source, and a mechanism for receiving X-ray radiation which has passed through a patient and generating a feedback signal representative thereof which enables automatic control of the amount of X-ray radiation received by the patient.

Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feedback control for real time monitoring and protection against failure due to excess current or voltage spikes. The apparatus includes a DC supply circuit utilizing a first feedback control loop and silicon controlled rectifiers to regulate the output of a high-voltage transformer. The apparatus further includes a regulator circuit utilizing a second feedback control loop and a series of FETs to product a continuous or pulsed output of precise magnitude and phase. Shielded voltage dividers are provided to accurately measure the voltage outputs and produce feedback control signals. Discharge modules on the high-voltage cables connecting the power supply to the X-ray tube discharge any capacitive voltage remaining on the cables between pulses, so as 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.