| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent deterioration in attenuation characteristics of a 2-stage filter to pass the noise specification with a small-sized filter. <P>SOLUTION: Due to a configuration where a cooling fin 3 whose potential is equivalent to the ground potential is provided in the vicinity of common choke coils L1 and L2, electrostatic coupling between the common choke coils L1 and L2 and the ground can be increased, and electrostatic coupling between the common choke coil L1 and the common choke coil L2 can be decreased. Thereby, deterioration in attenuation characteristics of a filter having two or more stages can be prevented to pass the noise specification with a small-sized filter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
