Patent ID: 6215834
Filing Date: 2001-04-10
Classification: G06F,H03L

Abstract:
A method of enabling operation of a device in a system having a multiple bandwidth phase locked loop, wherein the multiple bandwidth phase locked loop has a first mode of operation and a second mode of operation and receives an input signal and generates an output signal, said method comprising:A) while the phase locked loop is operating in the first mode of operation, performing a first frequency lock detect operation to determine whether the multiple bandwidth phase locked loop has acquired a first frequency lock on the input signal;B) repeating step (A) until the first frequency lock is detected in step (A);C) shifting the multiple bandwidth phase locked loop into the second mode of operation after the first frequency lock is detected;D) while in the second mode of operation, performing a second frequency lock detect operation to determine whether the multiple bandwidth phase locked loop has acquired a second frequency lock on the input signal;E) repeating steps (A), (B), (C), and (D) after shifting into the first mode of operation if the second frequency lock is not detected in step (D); andF) enabling a device to begin operation after the second frequency lock has been detected.