Magnetic sensor having a frequency filter coupled to an output of a magnetoresistance element
AssigneeKabushiki Kaisha Toshiba
InventorsRie Sato, Koichi Mizushima
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Abstract
A magnetic sensor includes a magnetoresistance element having a peak of a thermal fluctuation strength of magnetization under a magnetic field having a certain frequency, a frequency filter connected to the magnetoresistance element and having its transmittance decreased or increased in substantially the frequency of the magnetic field to output a signal corresponding substantially to the peak of the thermal fluctuation strength of magnetization, and a detector connected to the frequency filter to detect the magnetic field based on the signal of the frequency filter.
Claims10
A magnetic sensor to sense a magnetic field, comprising:
- a magnetoresistance element having a peak of a thermal fluctuation strength of magnetization under a sensing magnetic field having a certain frequency;
- a frequency filter connected to the magnetoresistance element and having a transmittance decreased or increased in substantially the certain frequency of the sensing magnetic field to output a signal corresponding substantially to the peak of the thermal fluctuation strength of magnetization;
- and
- a detector connected to the frequency filter to detect the magnetic field based on the signal of the frequency filter.
Dependencies are inferred from the claim text.