Apparatus for and method of measuring clock skew

摘要

Timing jitter sequences Deltaphi^j[n] and Deltaphi^k[n] of respective clock signals under measurement x_j(t) and x_k(t) are estimated, and a timing difference sequence between those timing jitter sequences is calculated. In addition, initial phase angles phi₀^j and phi₀^k of linear instantaneous phases of the x_j(t) and x_k(t) are estimated, respectively. A sum of a difference between those initial angles and the timing difference sequence is calculated to obtain a clock skew sequence between the x_j(t) and x_k(t).