| 摘要 |
PURPOSE:To obtain effective attenuation effect widely from a low to a high frequency even in a normal use state by using a common mode choke coil which uses an Mn-Zn ferrite core and a common mode choke coil which uses an Ni-Zn ferrite core. CONSTITUTION:The common mode choke coil 7 which uses the Mn-Zn ferrite core 12 as its magnetic core has large impedance at low frequencies and serves to remove noises from a low-frequency component, and the common mode choke coil 8 which uses the Ni-Zn ferrite core 13 as its magnetic core has large impedance at high frequencies and removes noises from a high-frequency component and also remove common mode noises over a wide range. Further, capacitors 9 and 10 for common mode noises when grounded remove the common mode noises and larger attenuation than before to the common mode noises is obtained. There is no doubt that a normal mode capacitor 11 remove normal mode noises. |
