SIGNAL TRANSMISSION APPARATUS

摘要

The transmission apparatus carries signals from a control unit to a number of memory units which correspond to signal terminals and which are connected in series with each other. The momory units at the starting end and at the final end are connected to the control unit to constitute a closed loop. The memory unit at the starting end or the final end receives a gate signal and stores it temporarily to open a gate. The memory units transfer gate signals to the subsequent stages successively responsive to clock pulses. The transmission appts. has detectors which sense whether the first gate signal has circulated the closed loop constituted by the series connected memory units. A switch switches the sending path of the gate signal depending upon the detected result so that the gate signal is sent from the momory unit of either the starting end or the final end.