Multichannel interfacing device having a termination circuit

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 receiving circuit delivering, when the receiving circuit is in the activated state, p output signals of the receiving circuit corresponding each to a transmission channel, p being an integer greater than or equal to 2 and less than or equal to m, the input of the receiving circuit being coupled to at least p of the signal terminals and to the common terminal, each of the output signals of the receiving circuit being mainly determined by one or more of the voltages between one of the signal terminals and the common terminal;
• and
• a termination circuit coupled to each of the signal terminals and to the common terminal, the termination circuit being, when the termination circuit is in the activated state, approximately equivalent, for the signal terminals and the common terminal, to a (m+1)-terminal network such that, at at least one quiescent operating point, for small signals in a part of the known frequency band, the impedance matrix, with respect to the common terminal, of said (m+1)-terminal network is equal to a wanted non-diagonal matrix of size m×m.