Voltafield Technology Corporation

Chih-Chao Shih

Fu-Tai Liou

Nai-Chung Fu

Chien-He Hou

The present invention provides an electric current sensor comprising a substrate and MR sensing circuit. The substrate has a first surface along a first axis and a second axis. The MR sensing circuit is utilized to detect a magnetic filed about a third axis. The MR sensing circuit is formed onto the first surface and has a plurality of MR sensor pairs. Each MR sensor in each MR sensor pair has a plurality of conductive structures, wherein the conductive structures of one MR sensor are symmetrically arranged. Alternatively, the present invention provides an electric current sensing device using a pair of electric sensors symmetrically arranged at two lateral sides of a conductive wire having an electric current flowing therethrough for eliminating the magnetic field along Z axis generated by external environment.

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Jhubei, Taiwan

Chih-Chao Shih