CONTROL CIRCUIT FOR SINGAL SYNCHRONIZATION

摘要

PURPOSE:To realize small sized hardware by forming a means receiving data of a timing error and providing an output of a correction period corresponding to the data with a circuit comprising standard logic components so as to attain high speed processing because no firmware is employed for synchronization control. CONSTITUTION:A logic circuit P1 outputting an error area signal through decoding and a logic circuit P2 outputting a correction period T+ or -DELTAt resulting from correcting a reference period T by a control width DELTAt through decoding are provided in place of the firmware between a timing error DELTAY measurement counter RC1 and a timing generating counter RC2. The high speed counter RC1 and the high speed timer RC2 are employed by using the logic circuits P1, P2 in this way. Moreover, a D-flip-flop FF1 is employed to prevent the effect of a temporary and abnormal change (glitch) of an output of the timing generating counter RC2.