Simple, inexpensive, general-purpose devices and methods achieve
simultaneous, full-duplex and bi-directional communication of analog,
digital or audio signals across a single conductor. "Sifudu"
transceivers, which stands for "simultaneous and full-duplex," reduce the
number of cables necessary for transferring information between two or
more terminals at a given rate, and/or facilitate information transfer at
a higher rate than traditional circuits across the same number of cables.
The transceivers can accommodate both digital and analog signals of
arbitrary polarity. Since a sifudu circuit is capable of transmitting
analog signals, it is also capable of transmitting digital signals in
frequency, phase, or amplitude shift keyed form, thus opening the
possibility of realizing higher baud rate than other simultaneous
bidirectional communication systems that transfer digital data only, one
bit at a time in each direction. The transceivers can be connected into a
multi-terminal network configurations including chain, star, tree, woods
topologies, alone or in combination.