Patent ID: 7508274

Claim:
A method of controlling an oscillator, comprising: comparing a reference signal to a feedback signal derived at least in part from an output signal of the oscillator to determine a phase error; clipping a magnitude of at least one of the phase error and a change in the phase error, if required, to provide at least one of a clipped phase error that has a clipped magnitude that does not exceed a prescribed maximum phase error and a clipped change in phase error that has a clipped magnitude that does not exceed a prescribed maximum change in phase error; determining that a temperature associated with the oscillator has changed by at least a threshold amount over a minimum time interval; and adjusting a control voltage input to the oscillator based on a stored data associated with a current value of the temperature if a stored data associated with the current value of the temperature is available, and entering a fast lock mode if no stored data associated with the current value of the temperature is available.