The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2009
Filed:
Aug. 02, 2005
Applicants:
Martin Feldtkeller, Munich, DE;
Antoine Fery, Munich, DE;
Michael Herfurth, Gilching, DE;
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 41/36 (2006.01); G05F 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for detection of non-zero-voltage switching operation of a lamp ballast, which has a half-bridge circuit with a first and a second semiconductor switching element, a resonant tuned circuit which is connected to one output of the half-bridge circuit, and a snubber capacitance, which is connected in parallel with one of the semiconductor switching elements. The method has the following method steps: