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:
Oct. 11, 2016
Filed:
Oct. 30, 2012
Multidimension Technology Co., Ltd., Zhangjiagang, CN;
Liansheng Han, Zhangjiagang, CN;
Jianmin Bai, Zhangjiagang, CN;
Wei Li, Zhangjiagang, CN;
Songsheng Xue, Zhangjiagang, CN;
MultiDimension Technology Co., Ltd., Zhangjiagang Jiangsu, CN;
Abstract
A current sensor comprises a sensor bridge, with magnetic tunnel junction (MTJ) elements, a MTJ temperature compensation resistor, and a current lead integrated onto a chip. The current lead is positioned close to the sensor bridge, and it is used to carry the test current. A permanent magnet is arranged at the periphery of the MTJ temperature compensation resistor. The permanent magnet rigidly aligns the magnetization direction of the free layer of the MTJ temperature compensation resistor anti-parallel to the magnetization direction of a pinning layer. The sensor bridge is connected in series with the MTJ temperature compensation resistor to temperature compensate the sensor bridge. A magnetic field generated by the test current produces an output voltage at the output of the temperature compensated sensor bridge that is proportional to the test current value.