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:
Apr. 16, 2013
Filed:
Mar. 25, 2008
Anton Werner Keller, Arni, CH;
Anton Werner Keller, Arni, CH;
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
An integrated circuit (IC) forming a pulse-width modulator controls the switching operation of an output stage of a switching power supply. A snubber capacitor that is coupled to a primary winding of a transformer of the output stage is used for producing a capacitive coupled charging current. The capacitive coupled charging current is coupled to a filter or charge storage second capacitor for producing in the second capacitor a first portion of a second power supply voltage. During a portion of a switching cycle of the output stage, the snubber capacitor is coupled to an inductor to form a resonant circuit. The resonant circuit produces in the second capacitor a second portion of the second power supply voltage for energizing the IC. The second power supply voltage is used for energizing the IC.