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:
Jul. 08, 2003
Filed:
Oct. 09, 2001
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A switching power supply device in which a transformer, a first switch circuit, and an input power source are connected in series. A series circuit formed of a second switch circuit and a capacitor is connected to one end of the first switch circuit. The transformer has a driving winding which is wound in the same direction as that of the primary winding of the transformer. A capacitive impedance element including a series circuit formed of a capacitor and an inductive ferrite bead, is connected between the termination of the driving winding and the input power source. The switching power supply device uses a less capacitive impedance and thus provides higher radiation noise reduction performance, thereby preventing switching devices from being damaged due to high voltage increase rate of the switching devices.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile