Multiple voltage ballast
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United States of America Patent
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Jan 1, 2013
Grant Date -
Sep 20, 2007
app pub date -
Mar 6, 2006
filing date -
Mar 6, 2006
priority date (Note) -
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Abstract
A ballast and method for operating a ballast includes a switch or other circuit for connecting and disconnecting a voltage multiplier to a rectifier circuit. A control circuit for controlling the switch senses an input voltage and connects the voltage multiplier to the rectifier circuit when an input voltage falls below a selected voltage level.
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