Highly sensitive magnetic sensing method using magnetoresitance devices

Hideo Kaiju, Kazuya Saisho, Kazuo Shiiki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A highly sensitive magnetic sensing method using magnetoresistance devices is proposed. An InSb magnetic sensing device was used in the feedback loop of a Hartley oscillator. The oscillation starts when the resistance of the InSb magnetic sensing device changes in the external magnetic field as the oscillation condition is fulfilled. We can detect the magnetic 1 or 0 signal, corresponding to oscillation or nonoscillation, respectively. Output response and error rate in our magnetic sensing for the detection of oscillation were invesitigated. As a result, a high output response of 1 Vpp was obtained even if the electric sensing current which flows into the InSb magnetic sensing device was 450 μA. The resistance change of more than 30 Ω is required in order to maintain an error rate of less than 10-5. Therefore, this magnetic sensing method has potential application in highly sensitive magnetic sensors.

Original languageEnglish
Pages (from-to)5600-5603
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number8 A
DOIs
Publication statusPublished - 2004 Aug 1

Keywords

  • Feedback loop
  • Hartley oscillator
  • Magnetic sensing method
  • Magnetoresistance effect
  • Sensing current

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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