Patent ID: 7567642
Filing Date: 2009-07-28
Classification: H03D,H03L,H04L

Abstract:
1. A method of operating a phase detector to generate a signal indicative of a phase difference between a first input signal and a second input signal, the first input signal comprising a first sequence of edges, and the second input signal comprising a second sequence of edges, the method comprising: with a limited range phase detector, generating a limited range phase difference between selected edges of the first and second input signals; detecting an excursion of the limited range phase difference beyond a predetermined threshold; in response to detecting the excursion of the limited range phase difference beyond the predetermined threshold, preventing an edge of the first or second input signal from influencing subsequent generation of the limited range phase difference; and with the phase detector, generating a compensated phase difference derived from the limited range phase difference and including a correction component which compensates for an effect of preventing an edge of the first or second input signal from influencing subsequent generation of the limited range phase difference.