• Crossfield Sensitivity in AMR Sensors 

      Autor: Ripka, Pavel; Janošek, Michal; Butta, Mattia
      (IEEE, 2009-10)
      We discuss the origin of the crossfield sensitivity of AMR sensors, the way how this error may influence the performance of an AMR compass and methods for its correction. Finally, we confirm the simple formulas experimentally. ...
    • Linearity of Pulse Excited Coil-Less Fluxgate 

      Autor: Butta, Mattia; Ripka, Pavel
      (IEEE, 2009-10)
      In this paper, we study the open-loop linearity of pulse excited coil-less fluxgate. Narrow current pulses can be used instead of classical sinewave for the excitation of the coil-less fluxgate. This method has shown several ...
    • Sensitivity and Noise of Wire-Core Transverse Fluxgate 

      Autor: Ripka, Pavel; Butta, Mattia; Jie, Fan; Li, Xiaoping
      (IEEE, 2010-02)
      Fluxgate sensors with cores made of amorphous microwire have low sensitivity due to the small cross-sectional area of the wire. Previous studies with multiwire cores have shown nonlinear increase of sensitivity with number ...
    • Two-Domain Model for Orthogonal Fluxgate 

      Autor: Butta, Mattia; Ripka, Pavel
      (IEEE, 2008-11)
      In this paper a new model for orthogonal fluxgate is presented. A first attempt to explain the working principle of the orthogonal fluxgates was done in the 1970's. We show that this model does not work well on recently ...