| 摘要 |
A magnetic encoder 1 having a magnetic sensor 6 composed of SVGMR elements 5, in which a signal output with a half of a cycle of magnetic regions on a magnetic medium. The magnetic encoder 1 comprises the magnetic medium 2, on which first magnetic regions 21 and second magnetic regions 22 are oppositely magnetized along the medium extending and disposed successively and alternately with each other, and the magnetic sensor 6 that has an even number of SVGMR elements 5 and is movable relatively to the medium along the medium extending. Magnetizations of pinned magnetization layers 10 of all the SVGMR elements 5 are directed in a same direction along the medium extending. Each of the even number of SVGMR elements 5 in the magnetic sensor 6 is apart by a half of the sum of a first magnetic region length plus a second magnetic region length from each other along the medium extending, and the even number of SVGMR elements 5 are connected in series so that a cycle of resistance change of the magnetic sensor 6 is a half of a cycle length of the first and the second magnetic regions 21, 22 on the medium and the signal output with high resolution can be obtained.
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