| 摘要 |
The invention relates to an active impedance converter circuit with a first side with complex impedance and a second side with complex/resistive impedance. The impedance converter is provided with an amplifier (15, 16, 17, 19; 15a, 15b, 16a, 16b, 17a, 17b, 19) which input is connected to said first side of the circuit. The amplifier is adapted to provide low gain for low frequency signals and to change over to provide more gain for high frequency signals. The invention also relates to a splitter for splitting a subscriber line into a first transmission branch including a low pass filter and a second transmission branch including a high pass filter. The invention also comprises a termination of a twisted pair telephone transmission line for delivering two-way service including low frequency band telephone signals and high frequency band digital subscriber line signals. |
