Patent ID: 7664212

Claim:
A method for switching between two clocks in a device, the method comprising: receiving an incoming signal at a receiver circuit to produce a received signal; generating an output clock from a selected one of the two clocks; waiting for the selected one of the two clocks to transition to a predetermined state; and holding the output clock in the predetermined state until the other of the two clocks transitions to the predetermined state, if the other of the two clocks is not in the predetermined state when the request to switch is pending, wherein the two clocks include a first phase indeterminate clock recovered from a first processing path associated with processing the received signal, wherein the selected one of the two clocks is the first phase indeterminate clock, and wherein the request to switch from the selected one of the two clocks to the other of the two clocks occurs when a signal metric associated with the received signal on the first processing path meets a predetermined criteria when compared to a reference value.