Calibratable phase-locked loop

Details Calibratable phase-locked loop Calibratable phase-locked loop

2006-09-12

2006-09-12

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S00100A, C331S17700V, C331S034000, C331S175000

Reexamination Certificate

active

07106140

ABSTRACT:
The subject matter hereof relates to a calibratable phase-locked loop. The calibratable phase-looked loop in an example embodiment comprises a charge pump and calibration means for the loop, wherein calibration means comprises: first means for rendering unstable a stable phase-locked loop so that a sinusoidal signal is provided; second means for generating a squared signal from the so-provided sinusoidal signal; and a logic circuit for determining the frequency of the squared signal and for controlling the charge pump in correcting the frequency of the squared signal as a function of a desired frequency.

REFERENCES:
patent: 5382922 (1995-01-01), Gersbach et al.
patent: 6686804 (2004-02-01), Adams et al.

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