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. 26, 2014
Filed:
Jul. 13, 2012
Ding-yeong Wang, Hsinchu County, TW;
Young-shying Chen, Hsinchu, TW;
Keng-ming Kuo, Yunlin County, TW;
Ding-Yeong Wang, Hsinchu County, TW;
Young-Shying Chen, Hsinchu, TW;
Keng-Ming Kuo, Yunlin County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
Magnetic field sensing method and apparatus of this disclosure uses two tunneling magneto-resistor (TMR) devices. Angles of the free magnetizations of the two TMR devices with respect to a fixed direction are set in a first to fourth period. In the first to fourth period, the two TMR devices act as a TMR sensing unit and a zero-field reference unit by turns, and each of the conductance difference between the sensing unit and the zero field reference unit is also obtained in each of the first to fourth period. Finally, the four conductance differences are summed up.