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High voltage power supply for an X-ray tube

  • US 5,400,385 A
  • Filed: 09/02/1993
  • Issued: 03/21/1995
  • Est. Priority Date: 09/02/1993
  • Status: Expired due to Term
First Claim
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1. A high voltage power supply for biasing an X-ray tube comprising:

  • a first source of a reference voltage level that represents a desired bias voltage magnitude for the X-ray tube;

    an inverter that produces an alternating voltage from a DC input voltage in response to control signals;

    a voltage multiplier connected to said inverter to increase the alternating voltage thereby producing an output voltage of the power supply;

    a voltage sensor for sensing the output voltage and producing a sensor signal indicating a magnitude of the output voltage;

    a circuit coupled to said first source and said voltage sensor, and determining a difference between the sensor signal and the voltage level reference signal;

    an integrator connected to said circuit to integrate the difference between the output voltage and the voltage level reference signal to produce an integrated signal;

    a second source of a duty cycle reference signal;

    a summation device coupled to said integrator, said second source and said voltage sensor for combining the integrated signal, the duty cycle reference signal and the sensor signal to produce a DUTY CYCLE COMMAND signal; and

    an inverter driver coupled to said integrator and said summation device for generating control signals for said inverter wherein the control signals have frequencies defined by the integrator signal and have duty cycles defined by the DUTY CYCLE COMMAND signal.

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