Analog behavioral modeling of magnetoresistive sensors

Author

Fardi, Hamid ; Alaghband, Gita

Author_Institution

Dept. of Electr. Eng., Univ. of Colorado Denver, Denver, CO, USA

fYear

2010

Firstpage

408

Lastpage

411

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on

Conference_Location

Seattle, WA

ISSN

1548-3746

Print_ISBN

978-1-4244-7771-5

Type

conf

DOI

10.1109/MWSCAS.2010.5548883

Filename

5548883