| 摘要 |
PURPOSE:To perform adjusting work readily and simply and to make it possible to perform fine adjustment, by laminating a plurality of ring cores, in which gaps are provided, winding wire around the ring cores, appropriately rotating the ring cores, thereby adjusting magnetic resistance. CONSTITUTION:A part of the circumference of each ring core 1, which comprises a magnetic material, e.g., ferrite and the like, and has a specified thickness, is cut out and a gap 2 is formed. The ring cores are laminated so that the gaps 2 are not overlapped. A piece of wire 3 is wound around the ring cores 1 as specified. Both ends of the winding 3 are inserted into a through hole of a printed wiring board 4. Both ends are bonded to the boards together with other mounted parts by solder dipping and the like. The circuits units mounted on the printed wiring board 4 are adjusted. The inductance is adjusted by rotating the ring cores 1, i.e., by moving the positions of the gaps 2, and changing the magnetic resistance of the core. After the adjustment, the entire ring cores are bonded and fixed by a bonding material and the like. |
