VCO CALIBRATION SCHEME
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United States of America Patent
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Issued Date -
Dec 27, 2012
app pub date -
Jun 27, 2011
filing date -
Jun 27, 2011
priority date (Note) -
Abandoned
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Abstract
A technique to use a two-step calibration procedure to calibrate a voltage controlled oscillator (VCO) of a phase-locked loop. The first calibration step is an open-loop calibration procedure in which a control voltage of the VCO is temperature compensated and the VCO is tuned using a search routine to generate a corresponding output frequency based on the control voltage. The second step is a closed-loop calibration procedure to adjust the tuning components of the VCO to correct for a 1 LSB error.
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