Patent ID: 6973147

Claim:
A method comprising: providing a phase comparison output between logical transitions of first and second signals, wherein the phase comparison output is greater in magnitude for a phase difference between the first signal respective to the second signal between 0 and X degrees than for a phase difference between the first signal respective to the second signal that occurs between X and 180 degrees, wherein the phase comparison output for the phase difference between the first signal respective to the second signal that occurs between 0 and X degrees is non-zero and of constant magnitude, and the phase comparison output for the phase difference between the first signal respective to the second signal that occurs between X and 180 degrees is non-zero and of constant magnitude, wherein the phase comparison output is greater in magnitude for a phase difference between the first signal respective to the second signal between 0 and −X degrees than for a phase difference between the first signal respective to the second signal that occurs between −X and −180 degrees, wherein the phase comparison output for the phase difference between the first signal respective to the second signal that occurs between 0 and −X degrees is non-zero and of constant magnitude, and the phase comparison output for the phase difference between the first signal respective to the second signal that occurs between −X and −180 degrees is non-zero and of constant magnitude, wherein X is a positive real number; selectively adjusting a phase of the second signal based upon the phase comparison output; and sampling the first signal based upon the second signal.