Matt Ettus wrote:
The close in noise is from the COMMON reference, so there is nothing to
cancel, it is perfect. It is the further out phase noise components
which are not the same between the 2 PLLs, since those components are
from the individual VCOs. These integrate out fairly quickly, and are
much smaller anyway.
Right, that makes sense. Although I suspect that there's a "spectrum"
of contributions
both from the individual VCOs and the common reference, without a
clear dividing
line.
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