Characteristics of 2D magnetic field sensor based on magnetic sensitivity diodes

A two-dimensional (2D) magnetic field sensor is proposed in this paper. It contains two Wheatstone bridges composed of four magnetic sensitivity diodes(MSDs) with similar characteristics and four loading resistances. In order to realize the axial symmetric distribution of four MSDs, two MSDs with opposite magnetic sensitive directions were located along the x and -x axes, and two with opposite magnetic sensitive directions were located along the y and -y axes. The experimental results indicate that when V-DD=5.0 V, the magnetic sensitivities of the 2D magnetic sensor can reach S-xB=544 mV/T and S-yB=498 mV/T in the x and y directions, respectively. Consequently, it is possible to measure the two-dimensional magnetic field. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.