US Patent 7084579 Two light level ballast
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Patent abstract
An electronic ballast (100) for powering at least one gas discharge lamp (30) at two light levels includes a full-wave rectifier circuit (120) and a detector circuit (200). Detector circuit (200) provides an output voltage that is dependent on the states of two on-off switches (S1,S2), but that is substantially unaffected by typical X capacitances that are present between the hot and neutral input connections of the ballast.
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Patent Inventor Names
Himamshu Prasad0
John G. Konopka0
Naveen Yadlapalli0
Shashank Bakre0
Date of Patent
August 1, 2006
0Patent Application Number
110108450
Date Filed
December 13, 2004
0Patent Primary Examiner
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US Patent 7084579 Two light level ballast
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