A low power line driving transmission apparatus is described in which TDM signals are transmitted between points over a transmission line comprising a pair of conductors and in which the characteristic impedance of the tranmission line and the source impedance of the transmitters is matched and wherein...http://www.google.fr/patents/US4630284?utm_source=gb-gplus-shareBrevet US4630284 - Low power line driving digital transmission system
Low power line driving digital transmission system
