| 摘要 |
PURPOSE:To facilitate varying operation of mutual inductance and produce a device at low cost, by a method wherein a lot of attaching holes are provided on a printed circuit board and selected suitably for attaching a shield plate. CONSTITUTION:A plurality of inductance elements 1, 2 having mutual inductance are arranged on a printed circuit board 5. A lot of attaching holes a-f are formed on the printed circuit board 5 between the elements 1, 2. Mutual inductance between the elements 1 and 2 varies depending on positions of the attaching holes incombination of a & d, b & e, and c & f to which a shield plate 3 is attached. The attaching holes may be provided to any position where the shield plate 3 can be attached. The shield plate 3 may be provided in plural number. |
