| 摘要 |
PURPOSE: To obtain a noise filter for effectively removing noises generated at a specific frequency band, without weakening a signal. CONSTITUTION: In a noise filter, a power source line or a signal line, into which a power source or an electrical signal overlapping a noise to be removed is input is wound with a magnetic material as a winding core body, thereby removing the noise. In this case, the frequency characteristic of impedance of the noise filter has a maximum similar to that in an LC parallel circuit with respect to a specific frequency, and the noises are removed in own resonance frequency band which includes the own resonance frequency as the specific frequency. |
