| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an on-vehicle communication device high in the degree of freedom related to the structure of a wire harness including a trunk line and branch lines of a network and arrangement of wiring, and capable of suppressing increase of cost of the whole device. <P>SOLUTION: This on-vehicle communication device including three or more communication nodes and a communication line for connecting them to one another is provided with: a trunk line 31 having a first communication node 21 connected to one end thereof and a second communication node 24 connected to the other end thereof; a first trunk line termination resistor 51 connected to the first communication node; a second trunk line termination resistor 52 connected to the position of the second communication node; a branch line 35 of which the line length is restricted smaller than that of the trunk line 31, and which has one end connected to an intermediate part of the line of the trunk line; and a signal relay portion 30 connected to the other end of the branch line 35, and having input impedance sufficiently larger than that of the first trunk line termination resistor 51 and that of the second trunk line termination resistor 52. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
