Dynamically adjustable filament control through firmware for miniature x-ray source
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United States of America Patent
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Feb 24, 2015
Grant Date -
May 22, 2014
app pub date -
Nov 21, 2012
filing date -
Nov 21, 2012
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Abstract
An x-ray beam control system includes a feedback control loop circuit having a modulation circuit. The feedback control loop circuit generates a control signal. A x-ray tube, has a filament response profile of tube current versus filament temperature that is non-linear. A compensation circuit receives the control signal and modifies the control signal according to a compensating function that is matched to the filament response profile. The modulation circuit receives the modified control signal and generates a drive signal. The x-ray tube receives the drive signal at a filament thereof, and outputs a tube current signal having a linear response to the control signal. The feedback control loop circuit receives the tube current signal.
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