| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation angle detection apparatus used for the detection of the angle of rotation of a steering of an automobile etc. and capable of detecting short circuits between terminals of AMR (anisotropic magneto resistance) elements, preventing incorrect determination, and performing reliable detection. SOLUTION: Since it is possible to change over a switching means 19 to make a control means 17 detect the angle of rotation of a rotator 1 on the basis of output signals of the AMR elements 7 and 8 and detect short circuits between adjacent output terminals of the AMR elements 7 and 8 on the basis of the difference in output voltages from an amplification means 13 by connecting negative output terminals 11C and positive output terminals 12D of the AMR elements 7 and 8 to the control means 17 via a rectifying device 18 and the switching means 19, it is possible to achieve the rotation angle detection apparatus capable of preventing an incorrect determination and performing a reliable detection. COPYRIGHT: (C)2008,JPO&INPIT
|
