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:
Oct. 05, 1999
Filed:
Dec. 17, 1997
Benno Doemen, St. Georgen, DE;
Papst-Motoren GmbH & Co. KG, St. Georgen, DE;
Abstract
The present invention concerns a switched mode power supply with a timed switching regulator (1), whereby an electronic switching component (T.sub.1) is periodically switched on and off in such a particular pulse duty ratio, that an output control voltage (U.sub.B) is produced from a rectified input voltage (U.sub.E) across a storage circuit (2) with a smoothing choke (L), an intermediate circuit memory backup capacitor (C.sub.Z), and a free-wheeling diode (D.sub.F). The switching component (T.sub.1) is composed of a transistor, namely an FET or an IGBT, whose base or gate (G) is preconnected to a special control circuit (4) in such a way that an increased trigger current briefly flows in the trigger circuit for gating, and a substantially smaller holding current subsequently flows in the gated state, respectively.