| 摘要 |
This invention provides a filter component that has improved common-mode-noise attenuation characteristics. One end of each of a number of LC series resonant circuits (9a) provided respectively in a number of shunt circuits (8a, 8b, 8c) is connected to a first line (4a), and the other end of each of said LC series resonant circuits (9a) is grounded. One end of each of a number of other LC series resonant circuits (9b) provided respectively in the aforementioned shunt circuits (8a, 8b, 8c) is grounded, and the other end of each of said other LC series resonant circuits (9b) is connected to a second line (4b). Each of the LC series resonant circuits (9a, 9b) thus resonates reliably, reliably forming attenuation poles. As such, by setting the respective resonant frequencies of the LC series resonant circuits (9a, 9b) to frequencies that are effective in attenuating common-mode noise, said common-mode noise can be attenuated reliably, making it possible to provide a filter component (1) that has improved common-mode-noise attenuation characteristics. |
