Attila Kinali wrote:
On Sun, 15 Aug 2010 14:59:43 +1200
Bruce Griffiths<bruce.griffi...@xtra.co.nz> wrote:
Mea Culpa.
Below is a link to the paper using SAW filters to achieve a sub ps time
interval interpolator noise:
http://cddis.gsfc.nasa.gov/lw16/docs/papers/las_4_Prochazka_p.pdf
And the associated presentation:
http://cddis.gsfc.nasa.gov/lw16/docs/presentations/las_4_Prochazka.pdf
A quick skimming over the error analysis Panek made, suggests that
the jitter of the clock source is the biggest contributor to measurement
errors. But he never says how a clock source with such a low jitter is
build. Although he references a few times a module build by Josef Kölbl
of the Fachhochschule Deggendorf, there is no description available what
kind of device that is.
Does anyone have any pointers to recommended reading on the design of such
low jitter oscillators?
Attila Kinali
Such low jitter oscillators are readily available.
With some care (bandpass filtering) a cycle to cycle jitter of around
50fs or so is attainable with a Wenzel OCXO for example.
However the time interval jitter degrades as the time interval increases.
Achieving a cycle to cycle jitter of 1ps or so is relatively easy with a
10MHz or 100MHz OCXO having sufficiently low phase noise.
Bruce
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