Title :
Analog behavioral modeling of magnetoresistive sensors
Author :
Fardi, Hamid ; Alaghband, Gita
Author_Institution :
Dept. of Electr. Eng., Univ. of Colorado Denver, Denver, CO, USA
Abstract :
A behavioral circuit model of anisotropic magneto resistance (AMR) sensors that operates by modulating the drive bias on soft-adjacent-layer is developed. The non-linear extrinsic behavior of the sensor is modeled by constructing a two-dimensional (2D) polynomial at DC level for the variation of the sensor drive current controlled by the self bias of the sensor and magnetic field bias. Analog Behavioral Model is used to implement the model in SPICE. The simulation of second harmonic (2f) sensitivity signal and its comparison to the experimental data in a bridge configuration is presented. The comparison made with the experimental data permits the accurate prediction of 2f measurement for AMR sensors.
Keywords :
enhanced magnetoresistance; sensors; AMR sensor; analog behavioral modeling; anisotropic magneto resistance sensor; magnetic field bias; Anisotropic magnetoresistance; Bridge circuits; Magnetic anisotropy; Magnetic circuits; Magnetic field measurement; Magnetic modulators; Magnetic sensors; Perpendicular magnetic anisotropy; Polynomials; SPICE;
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-7771-5
DOI :
10.1109/MWSCAS.2010.5548883
