| 摘要 |
PURPOSE:To make the output circuit and transmission line into one unit, by providing the 3rd time tc which transmits nothing other than the output time ta and input time tb from the central unit and making tc>ta+tb. CONSTITUTION:A central unit M and terminal devices T1, T2-Tn have count circuits, the count of time is started with the start signal output from the central unit M, and the significance of pulse transmitted at each time is given. The terminal devices T1, T2-Tn are operated in the transmission of (M T1, T2-Tn), the terminal device T1 recognized the end (end of time slot ta) of transmission toward this direction, and during the time slot tb, the transmission of (T2 M) is made. In this case, the signal output from the terminal device T1 is input to the central unit M and also to the terminal devices T2, T3-Tn. Further, the count of itself is reset after a given time (end of tb) in the central unit and terminal devices. |
