H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 3/20 (2006.01) H04B 3/23 (2006.01) H04B 3/54 (2006.01)
Patent
CA 2355719
At the output of a line driver (1) connected to a long transmission line, signals received on the transmission line are only a fraction of signals transmitted by the line driver on the transmission line. To minimize the transmitted signal with its distortion and noise in the receive path of the line driver, an additional driver (4) having the same voltages and current in the signal path, is added. The additional driver (4) drives an additional load (Z2). The signal transmitted to the transmission line together with its superimposed received signal, is substracted from the signal from the additional driver (4), which is not superimposed on any received signal. The resulting signal is reduced from transmitted signal, transmitted distortion and transmitted noise. To minimize die size and power consumption, the additional driver (4) is scaled, but the distortion remains unchanged compared to the "normal" line driver.
A la sortie d'un transmetteur de ligne (1) connecté à une ligne de transmission longue, les signaux reçus sur la ligne de transmission ne représentent qu'une fraction des signaux transmis par le transmetteur de ligne sur la ligne de transmission. La présente invention concerne un transmetteur supplémentaire (4) ayant la même tension et le même courant sur le parcours du signal, qu'on ajoute afin d'atténuer la distortion et le bruit du signal transmis sur la voie de réception du transmetteur de ligne. Ledit transmetteur (4) commande une charge supplémentaire (Z2). Le signal transmis à la ligne de transmission avec un signal reçu superposé, est soustrait du signal du transmetteur supplémentaire (4), qui n'est pas superposé à un signal reçu. Le signal en résultant ne présente pas la distorsion et le bruit du signal transmis. Afin de réduire au maximum la taille de puce et la consommation de courant, le transmetteur supplémentaire (4) est gradué, mais la distortion ne varie pas comparée au transmetteur de ligne "normal".
Barkaro Stefan
Randahl Torbjorn
Beauchesne Nicolaescu
Telefonaktiebolaget Lm Ericsson
LandOfFree
Echo and distortion cancellation arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Echo and distortion cancellation arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echo and distortion cancellation arrangement will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1472701