Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Reexamination Certificate
2008-12-02
2010-10-05
Chang, Joseph (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
C331S016000, C375S222000, C375S232000, C375S233000, C375S346000, C375S350000
Reexamination Certificate
active
07808325
ABSTRACT:
A system and method for frequency pushing/pulling compensation in phase-locked loops including a method for cancelling frequency push/pull in an oscillator of a transmitter. The method includes computing an error signal from a signal of a phase locked loop, wherein the error signal includes an aggressor signal. Transfer characteristics are computed for the aggressor signal. A transmitted signal is filtered using the transfer characteristics to produce a correction term. The correction term is applied to a frequency control word being provided to the oscillator.
REFERENCES:
patent: 7046098 (2006-05-01), Staszewski
patent: 7375592 (2008-05-01), Skerritt
patent: 7391271 (2008-06-01), Cranford et al.
patent: 7400205 (2008-07-01), Niwa
patent: 2008/0172193 (2008-07-01), Rhee et al.
patent: 2008/0284530 (2008-11-01), Pellerano et al.
Muhammad Khurram
Waheed Khurram
Zhuang Jingcheng
Brady III Wade James
Chang Joseph
Neerings Ronald O.
Shin Jeffrey
Telecky , Jr. Frederick J.
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