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:
Jun. 17, 2014
Filed:
Nov. 18, 2011
Yosuke Ide, Niigata-ken, JP;
Masahiro Iizuka, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Hideharu Matsuo, 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;
Yosuke Ide, Niigata-ken, JP;
Masahiro Iizuka, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Akira Takahashi, Niigata-ken, JP;
Hideharu Matsuo, 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;
Alps Green Devices., Ltd., Tokyo, JP;
Abstract
A magnetic balance type current sensor includes a magnetoresistance effect element whose resistance value changes owing to the application of an induction magnetic field from a current to be measured; a feedback coil disposed in the vicinity of the magnetoresistance effect element and generating a cancelling magnetic field cancelling out the induction magnetic field; a magnetic field detection bridge circuit including two outputs causing a voltage difference corresponding to the induction magnetic field to occur; and a magnetic shield attenuating the induction magnetic field and enhancing the cancelling magnetic field, wherein, on the basis of the current flowing through the feedback coil at the time of an equilibrium state in which the induction magnetic field and the cancelling magnetic field are cancelled out, the current to be measured is measured, wherein the feedback coil, the magnetic shield, and the magnetic field detection bridge circuit are formed on a same substrate.