A digital signal reflection attenuation device is connected to a receiving end of a transmission line and contains a reflection attenuator connected between the signal line and the ground line, and also the signal line and the supply line. The attenuator clamps the voltage of digital signals between...http://www.google.fr/patents/US4943739?utm_source=gb-gplus-shareBrevet US4943739 - Non-reflecting transmission line termination
