| 摘要 |
PURPOSE:To make a necessary time up to synchronization establishment constant and to shorten a necessary detecting time by deciding whether or not the detected bit position is continuous over the prescribed number of frames, detecting the position of a complimentary bit C and establishing the synchronization. CONSTITUTION:After the counting of the prescribed number of frames counted by a counter 17, when an AND circuit 20 is opened, and the frame where data '1' are set is in flip flops 14-1-14-11, a signal Pk is given to a flip flop 21 and this is set at the timing corresponding to the bit position. The synchronization establishment for the frame mB1C-encoded by the setting of the flip flop 21 is detected and the synchronization position (position of complimentary bit C) is detected from the signal Pk. The time until synchronization is established is only the desired time of the number of frames. Thus, the synchronization can be established in a short time and always for a constant time. |
