| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an error caused by the occurrence of magnetic anisotropy in a magnetic detection element.SOLUTION: A rotating magnetic sensor 1 includes detection circuits 10, 20, and 30 for generating signals S1, S2, and S3 and arithmetic circuits 61, 62, 63, and 64. The detection circuits include magnetic detection elements, and the signals S1 and S2 are set so that they are mutually different in modes of variation due to magnetic anisotropy. The third arithmetic circuit subjects the signals S1 and S2 to inverse trigonometric function computation to output a first inverse trigonometric function computation signal and a second inverse trigonometric function computation signal. The fourth arithmetic circuit computes a difference between the first and second inverse trigonometric function computation signals obtained at a set time and updates an amplitude variation term in an angular variation term based on first magnetic anisotropy on the basis of a maximum value and a minimum value of the difference. The first arithmetic circuit obtains correction information. The second arithmetic circuit uses the first signal and the correction information to computer a corrected detection value.</p> |
