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US 2006/0214656 A1Published application
Angle sensor having low waveform distortion
AssigneeAlps Electric Co., Ltd.
InventorsYoshihiro Sudo, Ichiro Tokunaga, Yoshikazu Shimizu, Naoya Hasegawa, Fumihito Koike
Life of this patent
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Abstract
A magnetoresistive element includes a meandering X-axis array that is constituted by X-axis segments alternately connected, and a meandering Y-axis array that is constituted by Y-axis segments alternately connected. When rotated 90°, the Y-axis array has the same layout as the X-axis array. Such a structure cancels the electrical resistance change due to the AMR effect, thus reducing the waveform distortion of output voltage.
Claims3
An angle sensor comprising:
- a magnetoresistive element that includes a pinned magnetic layer having a fixed magnetization direction and a free magnetic layer having a magnetization direction that varies in proportion to an external magnetic field;
- a substrate for supporting the magnetoresistive element;
- and
- a rotor that forms a magnetic field and faces the magnetoresistive element,
- wherein the magnetoresistive element includes a plurality of X-axis segments that extend in an X-axis direction being the width direction of the substrate, and a plurality of Y-axis segments that extend in a Y-axis direction being the depth direction of the substrate, the X-axis segments and the Y-axis segments having the same length and width, and being alternately connected to each other to form a single continuous structure.
2 more elements
An angle sensor comprising:
- a magnetoresistive element that includes a pinned magnetic layer having a fixed magnetization direction and a free magnetic layer having a magnetization direction that varies in proportion to an external magnetic field;
- a substrate for supporting the magnetoresistive element;
- and
- a rotor that forms a magnetic field and faces the magnetoresistive element,
- wherein the magnetoresistive element includes a plurality of segments in an X-axis direction being the width direction of the substrate and a plurality of segments in a Y-axis direction being the depth direction of the substrate, the X-axis segments being spaced at a predetermined interval in the Y-axis direction, the Y-axis segments being spaced at a predetermined interval in the X-axis direction, the X-axis segments and the Y-axis segments being the same in number, length, and width.
2 more elements
Dependencies are inferred from the claim text.