Patent ID: 7489084
Filing Date: 2009-02-10
Classification: H01J

Abstract:
1. A power supply apparatus for supplying predetermined voltages respectively to an anode electrode, a cathode electrode, a collector electrode, and a helix contained in an electron tube, said apparatus comprising: an anode switch for turning on or off an anode voltage output which is a supply voltage fed between said cathode electrode and said anode electrode; and an anode switch control circuit for controlling an on/off operation of said anode switch such that the pulsed anode voltage is repeatedly applied a plurality of times at a predetermined period when the operation of a helix power supply, for supplying a helix voltage which is a supply voltage between said cathode electrode and said helix, is stopped, and when the operation of a collector power supply, for supplying a collector voltage which is a supply voltage between said cathode electrode and said collector electrode, is stopped.