Patent ID: 6385267
Filing Date: 2002-05-07
Classification: H03L,H04N

Abstract:
A method for phase aligning a first signal and a second signal, wherein the first and second signals have different frequencies, the method comprising the steps of:(a) detecting a phase difference between a pulse of the first signal and a corresponding pulse of the second signal; (b) comparing said detected phase difference to a calculated expected phase difference to produce an error signal proportional to the difference; (c) generating a local clock signal, wherein the frequency of said local clock signal is adjusted based on said error signal in order to phase adjust said local clock signal; and (d) generating one of said first or second signals, wherein the frequency of said generated one of said first or second signals is equal to the frequency of said local clock signal divided by N, wherein N is equal to the number of local clock signal pulses per pulse of said generated one of said first or second signals, to phase align said first and second signal.