Orthogonal fluxgate employing digital selective bandpass sampling

Eyal Weiss, Asaf Grosz, Shai Amrusi, Eugene Paperno

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Orthogonal fluxgate employing digital selective band pass sampling is developed and tested. The fluxgate output is sampled only once, at a single time instance during a number N of excitation cycles. This provides reconstruction of a measured magnetic field with a finite bandwidth from dc to 1/2N Hz. The sampling time instances correspond to the minimum magnitude of the fluxgate equivalent magnetic noise within the excitation cycles. As a result, the fluxgate resolution is improved by 40% compared to that obtained by conventional methods, where the fluxgate output is sampled a number of times and then averaged over each excitation cycle. The proposed approach not only improves the fluxgate equivalent magnetic noise, but also simplifies the fluxgate output processing by eliminating the need for analog synchronous detection.

Original languageEnglish
Article number6332985
Pages (from-to)4089-4091
Number of pages3
JournalIEEE Transactions on Magnetics
Volume48
Issue number11
DOIs
StatePublished - 29 Oct 2012

Keywords

  • Band limited signals
  • Magnetic noise
  • Magnetometers
  • Sampling methods

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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