| 摘要 |
A magnetic encoder includes a magnetic medium, at least three magnetic sensor elements opposed to the magnetic medium and sequentially arranged within a range equal to or shorter than a magnetized pitch or magnetized pitches of the magnetic medium, along a relative movement direction with respect to the magnetic medium, and a signal processing circuit receiving output signals from the at least three magnetic sensor elements. The signal processing circuit includes an input unit for detecting logical states of the output signals received from the at least three magnetic sensor elements and for generating a sequence of state-detection signals arranged in the order of the at least three magnetic sensor elements, and a judgment unit for judging that the output signals received are correct output signals only when the state-detection signal sequence generated agrees with either of two expected state-detection signal sequences.
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