Device for and method of aligning in time digital signals,...

Details Device for and method of aligning in time digital signals,... Device for and method of aligning in time digital signals,...

H - Electricity

04

L

H04L 7/033 (2006.01)

Patent

CA 2212292

A device and a method for aligning in time two essentially isochronous digital signals are provided, in which a plurality (2n) 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 (SL0, 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.

L'invention est constituée par un dispositif et une méthode servant à aligner temporellement deux signaux numériques essentiellement isochrones où une pluralité (2n) de reproductions (CK1-CK4) du premier signal (CKIN) ayant un déphasage donné sont produites et un certain nombre d'entre elles (CK3, CK4) sont soumises à un échantillonnage (4, 5) correspondant aux flancs ascendants du second signal (DATA). Le résultat de l'échantillonnage est une combinaison de signaux logiques (SL0, SL1) représentant le déphasage entre chacune des reproductions ci-dessus (CK1-CK4) et le second signal (DATA). Le signal de sortie (CKOUT) du dispositif, qui est aligné avec le second signal, correspond à celle des reproductions (CK1-CK4) du premier signal qui reproduit le mieux l'alignement désiré.

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