| 摘要 |
PURPOSE:To provide a compact noise attenuator at a low cost in which the suppression of a noise can be sufficiently attained without increasing the capacity of a capacitor or the number of steps of a filter. CONSTITUTION:A balanced inductance coil 1 using a toroidal core 1A made of an iron-base microcrystal soft magnetic material is cascade-connected with a balanced inductance coil 2 using a toroidal core 2A made of a ferrite so that a filter can be constituted. Therefore, noise components in a high frequency area are blocked by a part constituted of the balanced inductance coil 2 using the toroidal core 2A made of the ferrite, and the noise components in a low frequency area are blocked by a part constituted of the balanced inductance coil 1 using the toroidal core 1A made of the iron-base microcrystal soft magnetic material. Thus, the noise in a wide frequency range can be effectively suppressed. |
