Power supply apparatus and high-frequency circuit system
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United States of America Patent
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May 31, 2011
Grant Date -
Apr 16, 2009
app pub date -
Oct 10, 2008
filing date -
Oct 12, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention includes a Zener diode connected between a helix electrode and an anode electrode, a transistor that closes or opens a circuit between a cathode and an anode of the Zener diode, a photocoupler for turning ON/OFF the transistor through a phototransistor, a first switch for supplying or cutting off a DC voltage for the photodiode of the photocoupler, a capacitor to which the DC voltage that is to be supplied to the photodiode is applied and a control unit that turns ON the first switch beforehand to apply a DC voltage to the photocoupler and the capacitor and that turns OFF the first switch simultaneously with an application of a helix voltage.
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