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:
Aug. 27, 2013
Filed:
Nov. 18, 2011
Yosuke Ide, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Tsuyoshi Nojima, Niigata-ken, JP;
Shigenobu Miyajima, Niigata-ken, JP;
Naoki Sakatsume, Niigata-ken, JP;
Kenji Ichinohe, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Tatsuya Kogure, Niigata-ken, JP;
Hidekazu Kobayashi, Niigata-ken, JP;
Masahiro Iizuka, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Tsuyoshi Nojima, Niigata-ken, JP;
Shigenobu Miyajima, Niigata-ken, JP;
Naoki Sakatsume, Niigata-ken, JP;
Kenji Ichinohe, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Tatsuya Kogure, Niigata-ken, JP;
Hidekazu Kobayashi, Niigata-ken, JP;
Masahiro Iizuka, Niigata-ken, JP;
Alps Green Devices Co., Ltd., Tokyo, JP;
Abstract
A magnetic-balance-system current sensor includes: a magnetoresistive element, a resistance value of the magnetoresistive element being changed by applying an induction magnetic field generated by a measurement target current; magnetic cores disposed near the magnetoresistive element; a feedback coil disposed near the magnetoresistive element and configured to generate a cancelling magnetic field that cancels out the induction magnetic field; and a magnetic-field detecting bridge circuit having two outputs. The measurement target current is measured on the basis of a current flowing through the feedback coil when the induction magnetic field and the induction magnetic field and the cancelling magnetic field cancel each other out. The feedback coil, the magnetic cores, and the magnetic-field detecting bridge circuit are formed on a same substrate. The feedback coil is of a spiral type, and the magnetic cores are provided above and below the feedback coil.