| 摘要 |
PURPOSE:To extend the data transmission range by using a simultaneous detection circuit or the like so as to convert a serial bus electric signal into an optical signal without using a signal transmitter. CONSTITUTION:Output signals F, G representing the presence of a simultaneous signal are inputted to each input terminal of gate circuits 22, 7 from the simultaneous detection circuits 9, 24. Thus, in this case, each gate output of the gate circuits 22, 7 is sent to B and A terminal equipments and signals R10, R20 collide with each other. Thus, The signals R10, R20 are collided with each other in the serial bus 110 and when the signal R10, e.g., should have the priority to the signal R20, the control is applied to pass the R10 earlier. Since the serial bus electric signal is converted into an optical signal without using a signal transmitter, the data transmission range is extended. |
