Method for re-centering a VCO, integrated circuit and wireless device
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United States of America Patent
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Dec 6, 2016
Grant Date -
Mar 3, 2016
app pub date -
Jan 27, 2015
filing date -
Aug 27, 2014
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Abstract
A method of re-centering a voltage controlled oscillator of a wireless device comprising a phase locked loop circuit is described. The method comprises receiving an input frequency signal at a phase detector of the phase locked loop circuit from a frequency source; generating an oscillator signal based on the received frequency signal; selectably opening a feedback loop of the phase locked loop circuit when in a calibration mode of operation, performing coarse frequency tuning of the oscillator output signal; performing fine frequency tuning of a coarsely adjusted oscillator output signal; and closing the feedback loop.
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