| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive circuit capable of regenerating electric charges stored in an input capacitance of a semiconductor switching element into a direct-current power supply side, and an X-ray high-voltage apparatus using it. SOLUTION: In order to drive a semiconductor switching element having an input capacitance formed between a gate electrode and a first output electrode, a first switch is connected between a direct-current voltage source and the gate electrode, a second switch is connected between the first output electrode and a reference potential terminal of the direct-current voltage source, and the first and second switches are turned on to turn the semiconductor switching element on. A direct-current voltage of the direct-current voltage source is boosted, a third switch is connected between the boosted-voltage power supply and the first output electrode, and the third switch is turned on to turn the semiconductor switching element on during a period of off-state of the first and second switches, so as to regenerate electric charges of the input capacitance charged in a period of on-state of the first and second transistors into the direct-current voltage source during a period of on-state of the third switch. COPYRIGHT: (C)2008,JPO&INPIT
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