| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation detecting apparatus capable of outputting a large detection signal with a small power consumption. SOLUTION: This rotation detecting apparatus comprises a magnetic sensor array having a number of sensor elements 5a and a magnetism generation means which faces the magnetic sensor array, rotates and has anisotropy in the circumference direction around the rotation center. As a circuit 11 for read-out, a circuit is provided for choosing and driving a number of sensor element 5a constituting the magnetic sensor array one by one, and extracting signal components from the flowing current for conversion into voltage and reading. This circuit 11 is constituted by, for example a switch current method, or a current mirror method. COPYRIGHT: (C)2006,JPO&NCIPI
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