Device for and method of aligning in time digital signals, for example a clock signal and a data stream

摘要

A device and a method for aligning in time two essentially isochronous digital signals are provided, in which a plurality (2<n>) of replicas (CK1-CK4) of the first signal (CKIN), separated by a given phase difference, are generated and a number of said replicas (CK3, CK4) is subjected to sampling (4, 5) in correspondence with the rising edges of the second signal (DATA). As the result of the sampling, a combination of logic signals (SLO, SL1) is obtained which is representative of the phase relation existing between each of said replicas (CK1-CK4) and the second signal (DATA). The output signal (CKOUT) of the device, aligned with the second signal, corresponds to the one, among the replicas (CK1- CK4) of the first signal, which best reproduces the desired alignment condition. <IMAGE>