| 摘要 |
The present invention relates to a filter device for suppressing radio-frequency interferences on a plurality of pairs of transmission lines. The device includes a filter function for each pair of transmission lines. The filter function comprises an inductance in series with a respective transmission line of the transmissionline pair, and a capacitance connected between this line and earth. In accordance with the invention, the filter functions are constructed, one upon the other, on a carrier (1) which includes along two mutually opposing sides (2a, 2b) rows of connector pins (3a, 3b) for the various pairs of transmission lines. Each filter facility includes two pairs of capacitor layers (7a, 7b, 14a, 14b) with intermediate insulation (8, 15), and two inductance layers (9, 13) having conductive paths (17, 19) with intermediate FE-layers (11). The one capacitor layer (7a, 14a) of each pair is connected to respective connector pins (3a or 3b) for the associated pair of transmission lines, and the other capacitor layer (17b, 14b) is connected to an earth pin. The conductive paths (17, 19) of the two conductance layers (9, 13) together form the inductances associated with the transmission-line pair and are connected to respective pins (3a, 3b) for this transmission-line pair. The various layers are mutually superimposed on the carrier (1) between the opposing rows of connector pins (3a, 3b). |
