Electricity: measuring and testing – Magnetic – Magnetometers
Reexamination Certificate
2006-12-05
2006-12-05
Aurora, Reena (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetometers
C324S244000
Reexamination Certificate
active
07145331
ABSTRACT:
In order to obtain a magneto-impedance type magnetic sensor having a soft magnetic film facing to a conductive nonmagnetic film, and available a large impedance change with a carrier signal at a relatively low frequency, the magnetic sensor comprises a meander type conductive nonmagnetic thin film of zigzag shape formed with at least one pair of electrode terminals at both ends and a soft magnetic film which is strip-shaped so as to face thereto at a plurality of regions and has an easy axis of magnetization in a width direction of the strip shape, a high frequency carrier signal is applied to the above-mentioned electrode terminals and further a direct current bias magnetic field is applied. By performing AM detection of an AM modulation signal output from the above-mentioned electrode terminals, an impedance change of the conductive nonmagnetic film which is changed by external magnetic field is detected as a change of the high frequency carrier signal, thereby the external magnetic field can be detected.
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Kuroe Akio
Muramatsu Sayuri
Murata Akio
Takahashi Ken
Tosaki Yoshihiro
Akin Gump Strauss Hauer & Feld & LLP
Aurora Reena
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