| 摘要 |
PURPOSE:To miniaturize a filter with its fabrication simplified and the number of components reduced by winding three sheets of metal foil around a cylindrical magnetic core via a sheet of a high dielectric constant insulator. CONSTITUTION:Cylindrical magnetic core 11 is wound with three sheets of metal foil 12 14 of Al through sheets 15 17 made of an insulator such as polypropylene, which is high in dielectric constant and wider than the metal foil. Then, metal foil 13 situated at the center is cut in at every time of winding to draw lead-out wire 18 for an arm, and sheets of metal foil 12 and 14 at both the sides are cut in to draw lead wires 19 21 for a coil from the winding beginning and ends of sheets of metal foil 12 and 14. Consequently, the fabrication is simplified, a small number of components are required, and miniaturization is realized. |
