| 摘要 |
A system for matching impedance in the circuitry of an xDSL communication device (140) to improve noise cancellation resulting from signal leakage between transmit and receive signals. The system for matching impedance includes a transformer (350) configured to couple an impedance (360), which is substantially equal to a line impedance (380), to a line coupling transformer (340), and is applicable to all known hybrid topologies. The transformer (350) is ideally as closely matched to the line coupling transformer (340) as possible. This technique allows greatly improved impedance matching in the hybrid, which directly benefits the performance of xDSL communication devices.
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