Abstract: A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load.

Abstract: A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load.

Abstract: A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load.

Abstract: A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load.

Abstract: A method and a system for providing electrical power to several gas discharge tubes, include a master power supply and several high-voltage modules. The master power supply is constructed and arranged to provide high-frequency and low-voltage power to the high-voltage modules. Each high-voltage module, in turn, provides high-frequency and high-voltage power to a gas discharge tube. The high-voltage modules include step-up transformers with their primary side connected in series to the output of the master power supply and their secondary sides connected to the gas discharge tubes.

Abstract: A method and a system for providing electrical power to several gas discharge tubes are disclosed. The system includes a master power module and several high-voltage modules. The master power module is constructed and arranged to provide high-frequency and low-voltage power to the high-voltage modules. Each high-voltage module, in turn, provides high-frequency and high-voltage power to a gas discharge tube. The high-voltage modules include step-up transformers with their primary side connected in series to the output of the master power module and their secondary sides connected to the gas discharge tubes.

Abstract: A high-frequency power supply system for a plurality of fluorescent tubes includes an inverter type power supply connected to the primary side of the high-voltage transformer. The secondary side of the high-voltage transformer includes two high-voltage coils arranged to provide power to four hot cathode fluorescent tubes, wherein each of said high-voltage coils is connected to two of said hot cathode fluorescent tubes connected in parallel. The secondary side of the high-voltage transformer also includes supplemental coils arranged to heat filaments of the hot cathode fluorescent tubes. The power supply also includes at least one capacitor and at least one inductor connected to the secondary side and arranged in a manner that the secondary side provides power to a substantially resistive load.

Abstract: An electrical power system for a cold cathode tube includes a high-voltage transformer with a primary side connected to a power supply and a secondary side connected to a cold cathode tube and includes a ground fault detector. The ground fault detector includes a resistive path, a detection circuit, an isolation circuit, and a stop latch. The resistive path is connected to the secondary side of the high-voltage transformer and is arranged to provide a ground fault path to ground fault current. The detection circuit is connected to the resistive path and is constructed and arranged to provide an output representing a fault detection signal. The isolation circuit is connected to the detection circuit and is constructed and arranged to isolate the fault detection signal from the primary side of the high voltage transformer.

Abstract: A universal mounting structure has receptacles for connection to a cold cathode tube. The structure has a mounting bracket which may be rotated about a longitudinal access of a receptacle housing, thus allowing mounting in any of a plurality of different configurations. The receptacle may include an electrical threaded connecter for an input signal to be received, the electrical threaded connector being aligned with the longitudinal access of the receptacle housing and providing a physical connection by which a mounting bracket may secure the receptacle housing to a mounting wall. The electrical threaded connector can also be used as a single attachment point for the receptacle. In another embodiment, the housing itself includes a flange extending from a plurality of faces of the housing to facilitate different mounting configurations.

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 power supply for a cold cathode tube has a high voltage module coupled directly to the cold cathode tube, and a power control module that provides a power control signal to the high voltage module via low voltage wiring. The power control module has a circuit that compensates for negative resistance of the ionized gas within the cold cathode tube by adjusting a frequency of the power control signal. The power control module also receives a return of from the cold cathode tube, and varies an illumination intensity of the cold cathode tube using a burst modulation technique, and provides shutdown in the event of a ground fault.

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: An optocoupler for isolating a high voltage from a low voltage comprising: an elongated light transmissive rod mounted inside a cavity of a housing, the cavity being filled with a fluid surrounding and in contact with an outside wall surface of the rod; a light emitter mounted at one end of the rod, the light emitter receiving a current input and emitting light in response to the input; a light detector mounted at an opposing end of the rod, the light detector having a detection surface receiving light emitted from the emitter and generating a current output signal in response to the received light; the emitter and detector being mounted such that light emitted from the emitter travels through the rod and is directed toward the detector; a portion of the light emitted from the emitter traveling in a path into impingement with the outside wall surface of the rod; the rod having a first refractive index and the fluid having a second refractive index; the outside wall surface of the rod having a selected contour

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 discharge module positionable between a high-voltage power supply and an X-ray tube for discharging any capacitive voltage remaining on the cable connecting the same. The discharge module includes a low-voltage control portion which is optically coupled to a high-voltage portion that includes a switch for activating a discharging resistor series. The module also monitors the current through the X-ray tube to initiate a fault if the current exceeds a predetermined maximum.