Extending Magnetoresistive AC Transfer Characteristics for Current Measurement

Author

Sanchez-Moreno, J. ; Ramirez, D. ; Casans, S. ; Cubells, M.D. ; Reig, C. ; Navarro, A.E.

Author_Institution

Dipt. Ing. Electron., Univ. de Valencia, Valencia

fYear

2008

fDate

12-15 May 2008

Firstpage

305

Lastpage

308

Abstract

This paper presents an open-loop compensation method in order to improve a commercial current sensor, based on the anisotropic magnetoresistive effect, for applications requiring high bandwidth current measurement. A simple passive differential filter is proposed to extend the open-loop AC transfer characteristic of AMR sensor. The sensitivity and bandwidth of the overall system are discussed by a transfer function analysis. Instrumentation setup and hardware prototype has been developed, and significant test results are shown.

Keywords

electric current measurement; magnetoresistance; passive filters; sensors; transfer functions; AMR sensor; anisotropic magnetoresistive effect; current sensor; high bandwidth current measurement; magnetoresistive AC transfer characteristics; open-loop AC transfer characteristic; open-loop compensation method; passive differential filter; transfer function analysis; Anisotropic magnetoresistance; Band pass filters; Bandwidth; Current measurement; Magnetic analysis; Magnetic sensors; Magnetic separation; Passive filters; Sensor phenomena and characterization; Transfer functions; analog processing circuits; compensation; current measurement; electronic equipment testing; frequency response; magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference Proceedings, 2008. IMTC 2008. IEEE

Conference_Location

Victoria, BC

ISSN

1091-5281

Print_ISBN

978-1-4244-1540-3

Electronic_ISBN

1091-5281

Type

conf

DOI

10.1109/IMTC.2008.4547051

Filename

4547051