Patent ID: 8774364

Claim:
An x-ray generating apparatus for generating an X-ray from a target by colliding an electron emitted from an electron source with the target through a grid electrode and a lens electrode comprising: a DC power source unit for generating a predetermined DC voltage; an inverter circuit for generating a pulse train based on the DC voltage outputted from the DC power source unit; a trans circuit for converting a voltage of the pulse train into a predetermined voltage and outputting the converted pulse train; a full-wave rectifying circuit for full-wave rectifying the pulse train outputted from the trans circuit, and supplying the full-wave rectified pulse train to the lens electrode; a half-wave rectifying circuit for half-wave rectifying the pulse train outputted from the trans circuit, and supplying the half-wave rectified pulse train to the grid electrode; and a control circuit for controlling an operation of the inverter circuit such that the trans circuit outputs a negative polarity voltage to the full-wave rectifying circuit and the half-wave rectifying circuit at times of first and last operations of the inverter circuit during a period of generating the X-ray.