| 摘要 |
A filter arrangement for replacing a standard filter for notch diplexers in telephone networks comprising a shunt arm and two longitudinal arms in a T arrangement, wherein the first longitudinal arm has a first inductance (L1), the second longitudinal arm has a second inductance (L3), and the shunt arm has a third inductance (L2), in addition to comprising a capacitor (C2) arranged in a series. The third inductance (L2) is increased in relation to the standard filter and the capacitor (C2) is correspondingly reduced, whereby a neutral point is maintained inside a given area.
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