| 摘要 |
PURPOSE:To obtain a large output amplitude, a high noise resistance and high rotating speed detecting accuracy by providing a magnetic resistance element near a magnet provided on a shaft of a motor. CONSTITUTION:A magnet 2 is provided on a shaft of a motor 1. A magnetic resistance element 5 is disposed near the magnet 2. When the motor 1 is rotated, the magnet 2 provided on the shaft of the motor 1 is rotated, the state of line of magnetic force which passes the element 5 varies, and the voltage in response to the variation in the line of magnetic force is outputted to the signal output terminal 5b of the element 5. |
