Multiplex transmissie-inrichting en -systeem.

摘要

A multiplex transmission device and system for a host to execute selected linkage to various external devices via a fixed connecting port includes a primary circuit system integrated with a signal switch loop and signal transmission circuit; a circuit linkage comprised of a port through signal control loop in the signal switch loop and that in the primary circuit system; and the signal switch loop to judge the form of an external device according to signal level of the pin, and to output signals to conduct the circuit.