A solution to a special case of the synchronization problem

Abstract

Perfectly synchronizing an asynchronous digital signal in bounded time is known to be impossible, since all bistable devices exhibit a region of metastability. In practice, "reliable synchronization" means the achievement of a synchronization failure rate comparable to hardware failure rates. Since metastable state decay times are exponentially distributed, an arbitrarily low synchronization failure rate can be achieved by performing the synchronization with a shift register of

A predictive synchronizer for periodic clock domains

“…While having a low latency and a "duplicate and miss" algorithm for the plesiochronous case, it is inapplicable to periodic domains. Another predictive synchronizer for plesiochronous domains is presented in [11]. It predicts the transmit clock behavior compared to the receive clock in advance.…”