Automobile multiplex communication system

Multiplex communications – Miscellaneous

Patent

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Details

333 12, H03H 701

Patent

active

058526137

ABSTRACT:
An automobile multiplex communication system has a plurality of control units mounted on an automobile and interconnected by a communication cable for multiplex communications therethrough between the control units. The communication cable has a uniform characteristic impedance and comprising a plurality of communication cable segments. A plurality of modified-impedance units, each having an impedance different from the uniform characteristic impedance, are each connected between adjacent two of the communication cable segments. The modified-impedance units are positioned in such locations on the communication cable that frequency bands of external noises tuned to the communication cable segments depending on their lengths are higher than a frequency band of a signal transmitted between the control units, and frequency bands of radiant noises tuned to the communication cable segments depending on their lengths are higher than a frequency band of a signal received by an electronic device mounted on the automobile.

REFERENCES:
patent: 4760355 (1988-07-01), Dash et al.
patent: 4992060 (1991-02-01), Meyer
patent: 5095296 (1992-03-01), Parker
patent: 5200720 (1993-04-01), Yi
patent: 5504737 (1996-04-01), Ichii et al.
patent: 5648688 (1997-07-01), Nagatani et al.

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