Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2003-10-09
2008-05-20
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S034000, C331S00100A, C331S018000
Reexamination Certificate
active
07375592
ABSTRACT:
A method for phase-locking a voltage controlled oscillator is disclosed. The method comprises receiving, at a phase detector, a phase input signal and a phase feedback signal from the voltage controlled oscillator; measuring a pulse width property of an error signal output from the phase detector to obtain a pulse width property measurement; storing the pulse width property measurement in a memory; and generating a new signal from the stored pulse width property measurement to phase-lock the voltage controlled oscillator. The method of the present invention may be used to calibrate a clock, in clock holdover and in qualification of clock sources.
REFERENCES:
patent: 3883817 (1975-05-01), Cliff
patent: 6005425 (1999-12-01), Cho
Juniper Networks, Inc.
Kinkead Arnold
Miles & Stockbridge PC
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