Hi, Magnus,
El 13/02/2012 09:06, Magnus Danielson escribió:
On 02/13/2012 08:28 AM, Javier Herrero wrote:
Hello all,
I'm planning to use in an application this oscillator
http://www.abracon.com/Precisiontiming/AOCJY.pdf in the 40MHz version.
The phase noise data in the data sheet is for the 10MHz version. Is it
possible to "extrapolate" these numbers to what I could expect in the
40MHz version? Any guideline?
A quick and dirty analysis comes from assuming the same noise but
chopped up differently by the frequency, then for original frequency
f1 and target frequency f2 you get the scale-factor f2/f1. Similarly,
the dB variant becomes 20*log(f2/f1) so for f1=10 MHz and f2=40 MHz
you get the scale factor 4 which turns out about 12 dB higher.
It's not perfect, but gives you a hint of what to expect.
That is exactly my thinking, but I was looking for a second opinion :)
We have anyway asked Abracon for pn data on the 40MHz version to be sure.
Thanks! Best regards,
Javier
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