AUTOMATIC LOOP-BANDWIDTH CALIBRATION FOR A DIGITAL PHASED-LOCKED LOOP

摘要

A phase-locked loop digital bandwidth calibrator includes a digital loop filter having a gain multiplier memory and a perturbation unit configured to generate a calibration offset signal to initiate a calibration. Additionally, the phase-locked loop digital bandwidth calibrator also includes a digital bandwidth calibration unit configured to provide a corrected nominal gain for storage in the gain multiplier memory, wherein a digital gain correction for the corrected nominal gain is determined by a digital integration stage and a correction database. A phase-locked loop digital bandwidth calibration method is also provided.

主权项

1. A phase-locked loop digital bandwidth calibrator, comprising:
a digital loop filter having a gain multiplier memory; a perturbation unit configured to generate a calibration offset signal to initiate a calibration; a digital bandwidth calibration unit configured to provide a corrected nominal gain for storage in the gain multiplier memory, wherein a digital gain correction for the corrected nominal gain is determined by a digital integration stage and a correction database.