Patent ID: 8400748
Filing Date: 2013-03-19
Classification: H01F,H01L,H03F,H04B

Abstract:
1. A magnetic coupler device comprising: a magnetic field generation circuit generating a magnetic field according to an input current; and a detection bridge circuit including a pair of magnetoresistance effect devices, a resistance value of each of the magnetoresistance effect devices changing by applying a magnetic field generated by said magnetic field generation circuit to each of the magnetoresistance effect devices, and having two outputs between which a voltage difference is generated according to an intensity of the magnetic field generated by said magnetic field generation circuit, wherein a geometric shape of each of said magnetic field generation circuit and said detection bridge circuit is formed to be line symmetric or point symmetric, wherein said magnetic field generation circuit includes two exciting coils electrically connected to each other and having geometric shapes symmetric to each other, and wherein one end of each of said two exciting coils is connected to same electrode and said two exciting coils are formed to be line symmetric about a line passing said electrode.