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:
Mar. 13, 2012
Filed:
Feb. 12, 2007
Klaus Fischer, Friedberg, DE;
Josef Kreittmayr, Bobingen, DE;
Klaus Fischer, Friedberg, DE;
Josef Kreittmayr, Bobingen, DE;
OSRAM AG, Munich, DE;
Abstract
The invention relates to an electronic ballast comprising a step-up converter for operating a discharge lamp. The electronic ballast is embodied in such a way as to disconnect a switching element (T) in the step-up converter when a maximum current value of the current flowing through the switching element is reached. The electronic ballast comprises a holding circuit (HS) which is provided with a time-function element (R, C) and is embodied in such a way that it sets the time-function element (R, C) when the switching element (TI) is disconnected and reconnects the switching element after a time interval defined by the time-function element (R, C).