Importance

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Abstract

There is provided voltage switching circuitry (100) for an X-ray tube (10). The voltage switching circuitry comprises a plurality of waveform generators (102) connectable to an output (14) of a voltage generator (12) for supplying an operating voltage to the X-ray tube. Each waveform generator is configured to generate a waveform. At least a first said waveform generator is configured to generate a first sinusoidal waveform having a first frequency and at least a second said waveform generator is configured to generate a second sinusoidal waveform having a second frequency. The second frequency differs from the first frequency by at least a factor of two. The voltage switching circuitry is configured to combine the waveforms at the output to switch the operating voltage between at least two different voltage levels. A plurality of the waveform generators (102) further comprise resonators (202, 204) and amplifiers (206) configured to excite resonance in the respective resonators, wherein the voltage switching circuitry (100) is further configured to switch at least one of the amplifiers which is not being used to excite resonance to generate harmonics for reducing over- or undervoltage when switching the opening voltage between the at least two different voltage levels. The voltage switching circuitry further comprises control circuitry configured to control the switching of the amplifiers.

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First Claim