Interface circuit and method for transmitting binary logic signals with reduced power dissipation

Abstract From the Canadian patent

An interface circuit transmits a binary logic signal by transmitting a pulse at a first potential at each falling transition of the binary logic signal, and a pulse at a second potential at each rising transition of the binary logic signal. At other times, the output terminal of the driver circuit is placed in the high-impedance state. The receiver circuit outputs a first logic level upon receiving a pulse at the first potential, and outputs a second logic level upon receiving a pulse at the second potential. Output of these logic levels is maintained until the next pulse is received. The transmission line is preferably terminated at a potential intermediate between the first and second …