Line interface apparatus and method for isolating data...

Details Line interface apparatus and method for isolating data... Line interface apparatus and method for isolating data...

H - Electricity

04

M

H04M 7/02 (2006.01) H04B 3/56 (2006.01) H04B 1/38 (2006.01)

Patent

CA 2171455

An improved isolation circuit for protecting data communications equipement from high voltages on a transmission line has two mixers (124, 130). The first dual balanced mixer (DBMX) (124) translates a data signal on the transmission line (30) to a high frequency and is coupled with an isolation circuit (128) to the second DBMX (130). The second DBMX (130) then translates the output of the first DBMX (124) to an isolated data signal with the same frequency content as the original data signal.

Circuit d'isolement perfectionné, comportant deux mélangeurs (102, 106), pour la protection d'une installation de communication de données contre les tensions élevées sur une ligne de transmission. Le premier mélangeur symétrique double (DBMX) (124), qui est couplé par un circuit d'isolement (128) au deuxième DBMX (130), traduit un signal de données sur une ligne de transmission (30) en une haute fréquence. Le deuxième DBMX (130) traduit alors la sortie du premier DBMX (124) en un signal de données isolé présentant les mêmes caractéristiques de fréquences que le signal de données initial.

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