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:
Feb. 05, 2013
Filed:
Jan. 17, 2007
Marcus Skatulla, Traunwalchen, DE;
Marcus Skatulla, Traunwalchen, DE;
OSRAM Gesellschaft mit beschrankter Haftung, Munich, DE;
Abstract
A circuit arrangement for increasing the safety of an electronic operating device comprising: mains input terminals (), a mains input filter () with X capacitors (XC, XC), which are connected in parallel with the mains input terminals, a rectifier part () with a full-wave rectifier (D-D) and a smoothing capacitor (C), which is connected between the output terminals of the full-wave rectifier (D-D), and a DC-DC voltage converter (), which is connected to the output terminals of the rectifier part. When the mains voltage is disconnected from the terminals, a load is switched on for a defined time span, the load and the time span being matched in such a way that the load consumes the residual energy which is stored in the capacitors (XC, XC, C), and thus lowers the voltage across the mains input terminals () to a value which is unhazardous for humans within a very short period of time.