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:
May. 18, 2010
Filed:
Feb. 17, 2005
Yoshiyuki Uno, Nagaokakyo, JP;
Akio Nishida, Kyoto, JP;
Hiroshi Takemura, Muko, JP;
Murata Macufacturing Co., Ltd., Kyoto, JP;
Abstract
A power supply unit includes a main power-supply circuit and a secondary power-supply circuit which are connected to an alternating current power supply AC. The main power-supply circuit includes a full-wave rectifier and an input current control circuit corresponding to a harmonic current suppression circuit. The input current control circuit includes a resistor as circuit current detection element and a control circuit for controlling a switch element by detecting a current flowing in the resistor. A connection is provided such that a current flowing in a diode as a second rectifying circuit of the secondary power-supply circuit may return to the alternating current power supply through the resistor.