Patent ID: 6794949
Filing Date: 2004-09-21
Classification: H03L

Abstract:
A method comprising the steps of:receiving a first control signal, wherein the first control signal is an analog control signal; providing a second control signal based on the first control signal to a first signal controlled oscillator to generate a first signal having a first frequency, wherein the first signal controlled oscillator is in a closed-loop feedback path of a phase-locked-loop; providing a third control signal based on the first control signal to a second signal controlled oscillator to generate an output a second signal having a second frequency, wherein the second signal controlled oscillator is not in the closed-loop feedback path of the phase-locked-loop; and modifying the third control signal based on a Frequency Control Signal to provide a modified control signal to the second signal controlled oscillator to generate a third signal at the output having a third frequency different than the second frequency while maintaining the first signal for the first signal controlled oscillator.