| 摘要 |
<p>An ECU (2) for executing serial communication via a transmission line (4) has a driver circuit (10). The driver circuit (10) includes an integrator (10a) for integrating a transmission signal (TX) and a power source (10b) for generating a current (iL) which corresponds to the integrated value of the transmission signal (TX) and releasing the current (iL) to the transmission line (4). A terminal circuit (6) for receiving a constant current (iT) smaller than a maximum current (iD) the driver circuit (10) can discharge is connected to the transmission line (4). Since the amount of output current (iL) from the driver circuit (10) is gradually changed, the generation of noise in the transmission line (4) can be prevented. Further, since the voltage of the transmission line (4) immediately changes to either high or low level depending on the amount of output current (iL), accurate data communication can be performed. <IMAGE></p> |
