Voltage control apparatus, power supply apparatus, electron tube and high-frequency circuit system
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United States of America Patent
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Jul 3, 2012
Grant Date -
Sep 3, 2009
app pub date -
Mar 2, 2009
filing date -
Mar 3, 2008
priority date (Note) -
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Abstract
A voltage control apparatus used for an electron tube or a power supply apparatus includes a detecting circuit for detecting current flowing through a helix electrode, a voltage-limiting circuit for controlling a potential difference between the helix electrode and the anode electrode based on a predetermined voltage level; and a switch for switching based on an output from the detecting circuit. The switch connects the helix electrode and the anode electrode through the voltage-limiting circuit, or causes a short circuit between the helix electrode and the anode electrode.
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