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:
Jun. 26, 2001
Filed:
Dec. 06, 1999
Hiroki Akashi, Hirakata, JP;
Toshikazu Nagaki, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
In a switching power supply apparatus, two mutually coupled inductors,are connected to both ends of a primary winding of a transformer, and a pair of switching units,and a pair of switching units,are connected to the other ends of the inductors,respectively, while two diodes,are connected at one end to both ends of the primary winding of the transformer and at the other end to a power supply, wherein the pair of switching units,and the pair of switching units,each constitute a series circuit in which the two switching means alternately turn on and off with a dead time period between the turning off of one switching unit and the turning on of the other switching unit, and wherein a voltage phase difference at a connection point between the two series circuits is 180° and the duty ratio of each of switching units is controlled.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile