| 摘要 |
In a line interface circuit for binary data signals means are provided for compensating varying lengths of line in the receiving and/or transmission path. The output signal of a line equalizer controls a variable impedance circuit in such a way that attenuation of a line build out network is reduced if the output level of the line equalizer is falling below a threshold. A transmit line build out network provides a frequency dependent attenuation of binary data by means of a control circuit, which supplies discrete attenuation values according to a logic word.
|
