Power supply for a hot-filament cathode
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United States of America Patent
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Jun 28, 2005
Grant Date -
Sep 23, 2004
app pub date -
Mar 4, 2003
filing date -
Mar 4, 2003
priority date (Note) -
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Abstract
In accordance with one embodiment of the present invention, there is provided a switch-mode power supply to generate the heating current for a hot-filament electron-emitting cathode. The power supply directly couples, without an output transformer, the output from a full-bridge converter that operates at an output frequency in the range from ten Hz to ten kHz. A connection to a reference potential that minimizes the potential fluctuation of the cathode is provided by one of the direct-current inputs to the converter.
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