| 摘要 |
<p>A driver circuit for supplying power to an X-ray tube includes a filament supply, a first transformer connected to an anode of the X-ray tube and a first switch connected between the driver control and first transformer. The driver control controls the first switch to move between an open and closed position. The signal applied to the first transformer when the switch is closed is adjustable in both frequency and pulse width and is applied to the X-ray tube to generate an adjustable X-ray beam. The first transformer includes a primary winding connected to the first switch and a secondary winding connected to an anode of the X-ray tube, a voltage to be included in the secondary winding is applied to the anode of the X-ray tube for generating the X-ray beam. The X-ray tube driver may further include a second switch, a second transformer connected between the second switch and driver control and a third transformer connected in parallel with the filament of the X-ray tube, the second transformer being connected to the cathode and in series with the parallel connection of the third transformer and ground. The second transformer applies a negative voltage tothe cathode. The driver circuit is able to provide a high voltage pulse having a width within a range of 100-200 sec. The high voltage pulse is adjustable to generate a voltage within a range of 0-40k and a range of 0-080kV when the second and third transformers are connected.</p> |
