| 摘要 |
PROBLEM TO BE SOLVED: To eliminate necessity of arranging a permanent magnet onto a detection objective gear as required in a conventional device, by integrating a magnetoelectric conversion element and a magnetic field generation means to detect a protrusion or a recess of a soft magnetic rotor, and to require no working expense for the recess for arranging the permanent magnet to reduce cost. SOLUTION: This rotation angle-detecting device for detecting a rotation angle of a gear 1 is provided with the gear 1 of of a soft magnetic body having teeth 1a as the protrusions, spin valve type great magnetic field resistance effect elements R1-R4 for obtaining angle information of the gear 1, and the permanent magnet 15 for impressing a bias magnetic field to the elements R1-R4. The elements R1-R4 and the permanent magnet 15 are positioned to be stored inside a housing of a case 25. COPYRIGHT: (C)2006,JPO&NCIPI
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