| 摘要 |
PURPOSE: To increase PG output, improve a SN ratio and eliminate the influence of interference with FG without increasing costs. CONSTITUTION: With respect to a motor 1 having a rotor made rotatable to a stator fixed to a printed circuit board 4 in which a wiring circuit pattern is formed on a board comprising aluminum or iron, a projection part 21 for projecting a part of the printed circuit board 4 is provided at the center of a spiral PG pattern coil 18 formed on the printed circuit board 4, and the PG pattern coil 18 is seemingly made to magnetically come near to a PG magnet 17. |
