Frequency-locked loop calibration of a phase-locked loop gain

Details Frequency-locked loop calibration of a phase-locked loop gain Frequency-locked loop calibration of a phase-locked loop gain

2011-03-01

2011-03-01

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S011000, C331S017000, C331S025000, C331S034000, C331S044000

Reexamination Certificate

active

07898343

ABSTRACT:
The present invention relates to a calibrated phase-locked loop (PLL), which has a calibration mode for measuring a tuning gain of a variable frequency oscillator (VFO) and a PLL mode for normal operation. Calibration information based on the tuning gain is used during the PLL mode to regulate a PLL loop gain. During the calibration mode, the calibrated PLL operates as a frequency-locked loop (FLL) for low frequency lock times, and during the PLL mode the calibrated PLL operates as a PLL for high frequency accuracy and low noise. By regulating the PLL loop gain, the desired noise spectrum and dynamic behavior of the PLL may be maintained in spite of variations in the operating characteristics or in the characteristics of the PLL components.

REFERENCES:
patent: 3538450 (1970-11-01), Andrea et al.
patent: 5493715 (1996-02-01), Humphreys et al.
patent: 6710664 (2004-03-01), Humphreys et al.
patent: 6724265 (2004-04-01), Humphreys
patent: 7023282 (2006-04-01), Humpreys et al.
patent: 7064591 (2006-06-01), Humphreys et al.
patent: 7098754 (2006-08-01), Humphreys et al.
patent: 2001/0052823 (2001-12-01), Hirano et al.
patent: 2002/0075080 (2002-06-01), Nelson et al.
patent: 2003/0048139 (2003-03-01), Chien et al.
Kral, A. et al., “RF-CMOS Oscillators with Switched Tuning,” IEEE Custom Integrated Circuits Conference, May 1998, IEEE.
Wilson, William B. et al., “A CMOS Self-Calibrating Frequency Synthesizer,” IEEE Journal of Solid-State Circuits, Oct. 2000, pp. 1437-1444, vol. 35, No. 10, IEEE.

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