A METHOD AND SYSTEM FOR REDUCING COMMON MODE NOISE INTERFERENCE IN A DIFFERENTIAL COMMUNICATION CHANNEL

A data transmission method includes providing, by a current source, a current to the first conductor while isolating the second conductor from the current source, to thereby transmit a first binary digit; and, responsive to a command to transmit a second binary digit, (i) decreasing from a maximum value to zero an amount of the current provided to the first conductor and (ii) increasing from zero to a maximum value an amount of the current provided by the current source to the second conductor. The decreasing and the increasing are performed simultaneously, in such a manner that the amount of the current provided to the first conductor decreases at the same rate as the amount of the current provided to the second conductor increases, and such that each of a first signal corresponding to the current provided to the first conductor and a second signal corresponding to the current provided to the second conductor has a transition edge having a leading section, a midsection and a trailing section, with the midsection of the transition edge having an average slope that is greater than an average slope of the leading section of the transition edge and that is greater than an average slope of the trailing section of the transition edge. A system is provided which includes a switching system, which is operatively interposed between the current source and the differential communication channel, and a controller which is operative to issue one or more signals control signals to the switching system to implement the data transmission method. La présente invention concerne un procédé de transmission de données comprenant la fourniture, par une source de courant, d'un courant au premier conducteur tout en isolant le second conducteur de la source de courant, pour ainsi transmettre un premier bit ; et en réponse à une commande pour transmettre un second bit, (i) la réduction depuis une valeur maximale vers zéro d'une quantité du courant fournie au premier conducteur et (ii) l'accroissement depuis zéro vers une valeur maximale d'une quantité de courant fournie par la source de courant au second conducteur. La réduction et l'accroissement sont effectués simultanément, de sorte que la quantité de courant fournie au premier conducteur diminue dans la même proportion que la quantité de courant fournie au second conducteur s'accroît, et de sorte que chacun d'un premier signal correspondant au courant fourni au premier conducteur et d'un second signal correspondant au courant