Automobile multiplex communication system

摘要

An multiplex communication system for an automobile (A) comprises a plurality of control units (1) interconnected by a communication cable (4). The cable (4) has a uniform characteristic impedance and comprises a plurality of cable segments (4a). Modified-impedance units (6), each having an impedance different from the uniform characteristic impedance, are connected between adjacent cable segments. The units (6) are positioned on the cable (4) so that the frequency bands of external noise tuned to the cable segments (4a) depending on segment lengths are higher than the frequency band of signals transmitted between the control units, and the frequency bands of noise radiated from the cable segments (4a) are higher than the frequency bands of signals received by electronic devices, such as radios, mounted on the automobile. <IMAGE>