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. 01, 2000
Filed:
Oct. 20, 1998
Kouichi Ueki, Saitama, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
In a smoothing circuit for a switching power supply having a reactor and a capacitor, the circuit includes a resistor connected in series to the capacitor, a MOSFET connected parallel to the resistor, and a control circuit for turning the MOSFET on only when the voltage at both ends of the resistor increases or decreases to reach reference voltages. Thus, the output waveform is changed from a triangular wave to a sine wave in order to reduce the harmonic components contained in the output ripple. An output noise is reduced stably without reducing efficiency.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile