| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotation angle detection device for improving the detecting accuracy of the rotation reference position of a rotation body.SOLUTION: A rotation angle detection sensor 10 includes: a detection element 11 for outputting a detection signal corresponding to the position of an outer peripheral part 31 of a magnetization rotor 30; a first comparator 14 for comparing the amplitude of the detection signal with a first threshold for detecting the rotation position of the magnetization rotor 30 to detect the rotation position of the magnetization rotor 30, and for outputting a rotation signal indicating the rotation position; a second comparator 15 for comparing the amplitude of the detection signal with a second threshold for detecting a rotation reference position to detect the rotation reference position, and for outputting a rotation reference signal indicating the rotation reference position. In this case, the second comparator 15 functions as exclusive determination means for detecting only the rotation reference position. Thus, it is possible to surely detect the rotation reference position.</p> |
