Estimation apparatus and method for estimating clock skew

摘要

A method for estimating a clock skew between a first clock and a second clock. The method includes the steps of detecting the clock skew to generate a detection resultant signal representing the clock skew; and determining time unit of a signal processing process, and estimating the clock skew according to the time unit of the signal processing process and the detection resultant signal.

主权项

1. An estimating device for estimating a clock skew between a first clock signal and a second clock signal, comprising:
a detecting circuit, to generate a detection resultant signal corresponding to the clock skew between the first clock signal and the second clock signal; a processing circuit, coupled to the detecting circuit and arranged for determining a time unit of a signal processing process, and estimating the clock skew according to the time unit of the signal processing process and the detection resultant signal; wherein the processing circuit calculates a number of M1 time units to which the first clock or the second clock corresponds for a time period length associated with a frequency of the first clock or the second clock, receives the detection resultant signal and determines that a set of data bits in the detection resultant signal corresponds to M2 time units of the signal processing process, and estimates the clock skew according to values of M1 and M2.