| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for combining enhancement of noise resistance and CAN communication, without using an expensive optical coupler.SOLUTION: A signal transfer device includes a pair of photoelectric converters 30 connected, respectively, with two transmission lines constituting CAN(Controller Area Network), and performing optical communication mutually. In the photoelectric converter 30, receiving means 31 receives the signal of a transmission line 2. Optical transmission means 34 converts a CAN reception signal, i.e., an output signal from the receiving means 31, into an optical signal that is transmitted to the other side of optical communication. Optical reception means 33 converts an optical signal received from the other side into an electric signal. The transmission means 34 transmits the output signal from the reception means 33, as a CAN transmission signal, to the transmission line 2. When the signal level of the CAN transmission signal is dominant, arbitration control means 32 holds the signal level of the CAN reception signal recessively.SELECTED DRAWING: Figure 2 |
