Patent ID: 7835469
Filing Date: 2010-11-16
Classification: H04L

Abstract:
1. A method comprising: receiving a data signal and a timing signal by a receiver; measuring a pulse shape of an eXclusive OR (XOR) signal on the basis of several measured samples of an XOR function of the received data signal and the timing signal; determining, based on average values of the measured pulse shape of the XOR signal, whether the XOR signal is at a high state or at a low state for a predetermined minimum period of time, wherein the minimum period of time is based on delay differences between the data and timing signals, and further based on at least one of setup-times and hold-times of the receiver; and adjusting a number of unit delay elements for compensating for skew between the data signal and the timing signal on the basis of whether the XOR signal is at the high state or the low state for the predetermined minimum period of time.