A method and an arrangement in an analog line interface circuit

Details A method and an arrangement in an analog line interface circuit A method and an arrangement in an analog line interface circuit

H - Electricity

04

B

H04B 3/03 (2006.01) H04L 25/02 (2006.01)

Patent

CA 2326429

In a line interface circuit for analog broadband applications, a terminating impedance towards a two-wire twisted copper line is set by sensing the line voltage, amplifying the sensed line voltage by a voltage amplification factor, converting the amplified voltage into a current, buffering and amplifying the current by a current amplification factor, injecting the amplified current onto the line, and adjusting the voltage amplification factor and/or the current amplification factor to set the terminating impedance to a desired value.

Dans un circuit d'interface de ligne pour des applications à bande large analogique, une impédance de bouclage vers une ligne bifilaire en cuivre torsadée est réglée par détection de la tension de ligne, amplification de la tension de ligne détectée par un facteur d'amplification de tension, conversion de la tension amplifiée en un courant, séparation et amplification du courant par un facteur d'amplification de courant, injection du courant amplifié dans la ligne et réglage du facteur d'amplification de tension et/ou du facteur d'amplification de courant afin de fixer l'impédance de bouclage à une valeur voulue.

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