| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation sensor that has reduction in accuracy of a pulse signal suppressed, and has the number of pulses to be included in the pulse signal increased.SOLUTION: The rotation sensor has: a magnetoelectric conversion unit (10) that converts a change in a magnetic flux of which a direction periodically varies with a rotation of a rotor (200) into an electric signal; and a processing unit (30) that processes the electric signal of the magnetoelectric conversion unit. The magnetoelectric conversion unit outputs a first detection signal and a second detection signal, and the processing unit has: a first comparison unit (31) comparing a detection threshold value with the first detection signal; and a second comparison unit (32) comparing a reference threshold value with the second detection signal. When the first detection signal exceeds or falls below the detection threshold value, the first comparison unit changes a voltage level of the detection threshold value and then, returns the voltage level of the detection threshold value to the original level on the basis of the second detection signal and the reference threshold value, and the first comparison unit converts the first detection signal into a pulse signal on the basis of the same voltage level of the detection threshold value. |
