Patent ID: 7412215
Filing Date: 2008-08-12
Classification: H03L,H04B

Abstract:
1. A system comprising: phase-locked loop circuitry comprising an input, a feedback path, and an output, which is adapted to provide a phase modulated radio frequency (RF) signal based on a phase modulation signal received on the input; switching circuitry adapted to couple the feedback path of the phase-locked loop circuitry to the output of the phase-locked loop circuitry for open loop operation and couple the feedback path to an output of power amplifier circuitry adapted to amplify the phase modulated RF signal for closed loop operation; and time alignment circuitry adapted to time align a feedback signal from the output of the power amplifier circuitry and a feedback signal from the output of the phase-locked loop circuitry prior to the switching circuitry switching the feedback path of the phase-locked loop circuitry from the output of the phase-locked loop circuitry to the output of the power amplifier circuitry.