FRAME SYNCHRONIZATION REPRODUCTION CIRCUIT

摘要

PURPOSE:To establish frame synchronization at a high speed with high accuracy. CONSTITUTION:A BIC state signal (c) from each stage of 6-stages of BIC state registers 20 is given to a BIC pattern detection circuit 24. The BIC pattern detection circuit 24 compares a received pattern with a desired BIC change pattern having been stored in advance and gives a high level signal to a JK-FF 26 via an OR circuit 48 from the BIC pattern detection circuit 24 when coincidence is attained. A high level signal representing establishment of the frame synchronization is outputted from the JK-FF 26.