Patent ID: 8125240
Filing Date: 2012-02-28
Classification: H04B,H04L

Abstract:
1. A device for transmitting signals through a plurality of transmission channels, in a known frequency band, comprising: m signal terminals, a common terminal and a reference terminal, the signal terminals being intended to be connected to an interconnection having m transmission conductors, m being an integer greater than or equal to 2; a transmitting circuit receiving q input signals of the transmitting circuit corresponding each to a transmission channel, q being an integer greater than or equal to 2 and less than or equal to m, the output of the transmitting circuit being coupled to each of the signal terminals, the output of the transmitting circuit delivering, when the transmitting circuit is in the activated state, m transmission variables, each of the transmission variables being either a voltage between one of the signal terminals and the common terminal or a current flowing out of one of the signal terminals, each of the transmission variables being mainly determined by one or more of the input signals of the transmitting circuit, one or more of the transmission variables being not mainly determined by only one of the input signals of the transmitting circuit; and a balancing circuit delivering, when the transmitting circuit is in the activated state, a current into the common terminal, the total current flowing out of the common terminal being, when the transmitting circuit is in the activated state, in at least a part of the known frequency band, approximately equal to a sum of three terms, the first term being a constant current, the second term being the opposite of the sum of the currents flowing out of the signal terminals, and the third term being the current flowing out of a passive two-terminal circuit element subject to the voltage between the common terminal and the reference terminal.