Ballasts for fluorescent lamps
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United States of America Patent
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Sep 13, 2011
Grant Date -
Mar 6, 2008
app pub date -
Sep 3, 2006
filing date -
Sep 3, 2006
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Abstract
Circuits are disclosed, for example for driving fluorescent lamps, and such circuits may form part of a ballast. First and second sensing circuits can apply respective signals to a control circuit as a function of an end-of-lamp life condition and of the number of re-strike attempts.
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