Phase-lock loop for preventing frequency drift and jitter...

Details Phase-lock loop for preventing frequency drift and jitter... Phase-lock loop for preventing frequency drift and jitter...

2005-01-18

2005-01-18

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

C331S018000

Reexamination Certificate

active

06844785

ABSTRACT:
A phase-lock loop for preventing frequency drift and jitter problems is disclosed. A phase comparator compares an input signal and a feedback signal, and outputs a control voltage according to phase difference therebetween. A voltage-controlled oscillator outputs a plurality of multiple phase oscillating signals according to the control voltage. A phase swallower receives a plurality of multiple phase oscillating signals, and generates a phase swallow signal. The phase swallow signal is formed by adding or removing one phase in the oscillating signal per predetermined number of clocks. An output frequency divider divides the frequency of the phase swallow signal so as to generate a desired output signal.

REFERENCES:
patent: 6711227 (2004-03-01), Kaylani et al.

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