| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To adequately determine a voltage signal of a communication line in a communication system in which the voltage signal of the communication line is generated from an output voltage of a DC power source which can fluctuate an output voltage. <P>SOLUTION: An LIN receiver 140 has a voltage divider circuit 160 outputting a voltage whose input voltage is divided, and a peak hold circuit 170 outputting a voltage holding a peak value of the input voltage. By outputting a voltage signal inputted from a bus 10 through the voltage divider circuit 160 and the peak hold circuit 170, a voltage which is a peak voltage (battery voltage V) of the voltage signal of the bus 10 is divided is generated as a threshold voltage. Thus, by using the voltage signal of the bus 10, the threshold voltage which fluctuates along with the fluctuation of the battery voltage can be generated even in a 5 V system ECU 100c to which the battery voltage is not applied. Accordingly, whether the voltage signal of the bus 10 is at a high level or at a low level can be adequately determined. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
