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A novel magneto‐impedance sensor model based on the zeros of Bessel functions
Author(s) -
VargasBernal Rafael,
De la Cruz Blas Carlos A.,
GómezPolo Cristina
Publication year - 2015
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2040
Subject(s) - bessel function , electrical impedance , transfer function , spice , electronic engineering , equivalent circuit , electronic circuit , representation (politics) , engineering , control theory (sociology) , computer science , mathematics , electrical engineering , mathematical analysis , voltage , control (management) , artificial intelligence , politics , political science , law
Summary Nowadays, the design of magneto‐impedance (MI) sensors requires the development of lumped circuit models that can be simulated through equivalent impedance circuits relied on Bessel functions. A new impedance model based on Senani's equivalent using the zeros of Bessel functions is developed in this paper. The model allows to describe the impedance as a transfer function that can be easily synthesized by means of current conveyor circuits and passive elements. The mathematical representation was verified under simulation of transfer functions involving different number of poles and zeros. Moreover, the model has been verified using SPICE simulations and measurement results from a fabricated prototype demonstrating its scope and validity. Finally, a study of finite tracking errors of CCIIs used in the implementation of magneto‐impedance sensor has been realized. Copyright © 2014 John Wiley & Sons, Ltd.