Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Reexamination Certificate
2008-11-07
2010-06-22
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
C327S001000
Reexamination Certificate
active
07741917
ABSTRACT:
According to an embodiment of a time to digital converter, the time difference between a signal of interest and a reference signal is measured by operating a digitally controlled oscillator at a first frequency during a first portion of the reference signal period and changing the operating frequency from the first frequency to a second frequency during the reference signal period as a function of the time difference between the signal of interest and the reference signal. The time to digital converter continuously counts how many signal transitions occur at an output of the digitally controlled oscillator during the reference signal period. The time difference between the signal of interest and the reference signal is estimated based on the number of signal transitions counted during the reference signal period.
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Coats & Bennett P.L.L.C.
Mis David
Telefonaktiebolaget LM Ericsson (publ)
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