| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic field direction detector.SOLUTION: The magnetic field direction detector detects whether a magnetic flux has a component of field from a first side or a second side of a detection axis or not and comprises a first magneto-resistive sensor and a perturbation generator. The perturbation generator causes an external magnetic field to be pe perturbed, and as a result, an apparent direction of flux is changed by an angle &thetas;at the first magneto-resistive sensor. The magnetic field direction detector further comprises a second magneto-resistive sensor, and the apparent direction of flux is changed by an angle &thetas;at the second magneto-resistive sensor due to the perturbation generator. Thus relative resistances of the first and second magneto-resistive sensors vary with respect to each other. |
