Title :
Precise AMR magnetometer for compass
Author :
Platif, A. ; Kubik, J. ; Vopalensky, M. ; Ripka, P.
Author_Institution :
Fac. of Electr. Eng., Czech Tech. Univ., Prague, Czech Republic
Abstract :
AMR sensors gain growing popularity in linear applications such as compassing (Tumaski and Ripka). We discuss techniques, how to achieve precision required for 0.2 deg azimuth error in wide temperature range. While linearity of 80 ppm FS and sensitivity tempco of 20 ppm/K can be achieved by using feedback compensation, offset drift and crossfield error can be lowered to nT level by periodical flipping.
Keywords :
compasses; feedback; magnetic anisotropy; magnetic sensors; magnetometers; magnetoresistive devices; sensitivity; AMR magnetometer; AMR sensors; compass; feedback compensation; periodical flipping; Circuit stability; Feedback; Linearity; Magnetic field measurement; Magnetic sensors; Magnetometers; Temperature dependence; Temperature distribution; Temperature measurement; Temperature sensors;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1278983
