| 摘要 |
<p>PURPOSE:To form the alarm signal by using the output of the set/reset flip-flop circuit, by providing the clock interruption detecting circuit detecting the clock interruption from the reception signal and clock signal, and set/reset flip-flop circuit. CONSTITUTION:The reception transmitting line signal (e) having the level converted at the interface circuit 11 is applied to the timing circuit 12, synchronizing circuit 13 and elastic memory circuit 14. When the clock interruption detection circuit 15 detects clock interruption in the clock (f) made at the timing circuit 12, it transmits the signal (g) to one input of the set/reset (S-R) flip-flop circuit 16 as the set signal. On the other hand, the synchronizing circuit 13 feeds the signal (h) to another input of the S-R FF circuit 16 at the synchronizing probability point of the synchronization discriminating pulse as the reset signal. FF16 converts the output signal (j) of the elastic memory circuit into the alarm signal (AIS) with the FF output signal (i).</p> |
