| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary magnetic detection sensor and a rotary magnetic detection circuit substantially reducing an error of the detection angle.SOLUTION: The rotary magnetic detection circuit includes: first to fourth elementary arrays 71 to 74 respectively having at least N-pieces of magnetic elements magnetized in the directions of two or more N types; a bridge circuit 6 using these elementary arrays; and a difference detector 4 for outputting a signal based on an output difference of this bridge circuit 6. The magnetization direction of the magnetic element of the first elementary array 71 and the magnetization direction of any magnetic element of the second elementary array 72 are 90 degrees different, and the magnetization direction of the magnetic element of the first elementary array and the magnetization direction of any magnetic element of the third elementary array 73 are 180 degrees different, and the magnetization direction of the magnetic element of the second elementary array and the magnetization direction of any magnetic element of the fourth elementary array 74 are 180 degrees different. In any of the first to the fourth elementary arrays 71 to 74, a sum of magnetization for each N type of magnetization direction is set larger as much as the sum of magnetization in the direction close to the specific direction of the rotary magnetic field. |
