| 摘要 |
PURPOSE:To assure the timing detection regardless of an error such as a drop- out, etc., by carrying out the desired timing detection if a detection unit signal is detected among plural these unit signals. CONSTITUTION:The control signal supplied to a control signal input terminal 1 is applied to a detecting signal generating circuit 2. The circuit 2 is controlled by the control signal and produces the detecting signal. The control signal has its leading time point ts which is earlier by time T than the timing tp to be detected. The detecting signal (b) sent from the circuit 2 is a digital signal. For this signal, the start and the end of signal are set at time points ts and tp respectively. Such detecting signal is applied to a detecting circuit 4 through a transmission line 3. The circuit 4 detects the presence or absence of the detecting signal to deliver a detection signal (c) to the output and to apply it to a detection signal output terminal 5. |
