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Journal of Applied Physics / Volume 99 / Issue 8 / PROCEEDINGS OF THE 50TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Magnetic Sensors (Not for Recording)

J. Appl. Phys. 99, 08B321 (2006); http://dx.doi.org/10.1063/1.2170065 (3 pages)

Response of oscillation-controlled magnetic sensing a

a No proof corrections received from author prior to publication.
K. Saisho and K. Shiiki

Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan

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(Published online 15 May 2006)

In the oscillation-controlled magnetic sensing system, the dependence of the response on the gain of the feedback loop and the oscillation frequency is investigated. Two types of response were observed according to the gain of the feedback loop. In the first response type, referred to herein as type A, the oscillation starts when the oscillation condition is satisfied and stops when the oscillation condition is not satisfied. In the second response type, referred to herein as type B, when the magnetic field changes, the oscillation starts and then stops because the oscillation condition was at the limit of being fulfilled. For an oscillation frequency of 31 MHz, the rise time tR and the fall time tF were 179 ns and 1.27 μs, respectively, for the type-B response. These times were approximately 1/10 of those observed for the type-A response. The linearity of the oscillation frequency and the response time in both logarithms was observed for the type-B response, and the rise time tR and fall time tF were reduced as the oscillation frequency was increased.

© 2006 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTS
  3. RESULTS AND DISCUSSION
  4. SUMMARY

KEYWORDS and PACS

Keywords

magnetic sensors, feedback oscillators, magnetic field measurement, circuit oscillations

PACS

  • 06.30.Ka

    Basic electromagnetic quantities

  • 07.07.Df

    Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

  • 84.30.Ng

    Oscillators, pulse generators, and function generators

  • 07.55.Ge

    Magnetometers for magnetic field measurements

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2170065

PUBLICATION DATA

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    A. J. Wallash and Y. K. Kim, J. Appl. Phys. 81, 4921 (1997)JAPIAU000081000008004921000001.

    W. Oepts, H. J. Verhagen, W. J. M. de Jonge, and R. Coehoorn, Appl. Phys. Lett. 73, 2363 (1998)APPLAB000073000016002363000001.


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