| 摘要 |
<p>PURPOSE:To minimize the hardware scale by sharing a memory for multiple point supervision with the delaying element of a strip control. CONSTITUTION:At the time of a pull out condition, in order to detect the frame pattern of an (n) point to exist for a frame bit period ((m)bit), input data are written to the (n) point same address of a memory 2 for an (m)bit, an (n) number of read data is compared with a frame pattern and a pattern detecting circuit 4 and the synchronization return is executed. However, at the time of the synchronizing condition, it is not necessary to compare the (n) number of data once, one bit of input data may be supervised for an (m)bit and therefore, the memory 2 is not necessary. Then, at the time of the synchronizing condition, the period of the wiring reading addresses of the memory 2 is controlled by a selecting circuit 6 so as to become from the (m)bit to a fixed delaying quantity lbit and the memory 2 is used as the delaying element of a strip control.</p> |
