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:
Jan. 10, 2006
Filed:
Feb. 14, 2002
Takahiro Kudo, Kanagawa, JP;
Yujiro Kitaide, Kanagawa, JP;
Kimitada Ishikawa, Saitama, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A small, low-cost, wide-range current sensor excellent in environmental resistance and noise resistance and high in accuracy, and an application device, a DC magnetic field is applied to two magnetic elements () having a magnetic impedance effect by means of a magnet (), while a negative feedback magnetic field is applied to both elements by means of a coil (). The variation of the magnetic field depending on the external magnetic field applied to the magnetic elements () is detected by detection units (). The difference between the output is amplified by a differential amplifier unit (). Thus, detection is achieved in a wide range while eliminating the influence of the noise.