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PSS+PNoise question (Read 3637 times)
xuel
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PSS+PNoise question
Mar 01st, 2007, 1:15am
 
I use pss+pnoise to simulate the noise of a switching circuit, in pnoise setup, choose jitter as noise type.
And I get a result of 10mV integrated noise. The question is is this value rms-noise or peak-noise?
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Ken Kundert
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Re: PSS+PNoise question
Reply #1 - Mar 1st, 2007, 6:47pm
 
It's got to be RMS. Peak is not defined for Gaussian noise.

-Ken
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xuel
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Re: PSS+PNoise question
Reply #2 - Mar 4th, 2007, 7:49pm
 
from the equation (19) on page 8 of "Modeling Jitter in PLL-based Frequency Synthesizers", the edge-to-edge jitter is calulated as:
Jee=sqrt(var(nv(tc)) / (dv(tc)/dt)
if var(nv(tc)) is rms noise, Jee should be rms jitter? I am puzzled.
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Ken Kundert
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Re: PSS+PNoise question
Reply #3 - Mar 5th, 2007, 3:51pm
 
Yes, Jee is RMS jitter.

You might want to update you version of that paper. Eqn (19) is no longer on page 8, and the equation you give is not Eqn (19).

-Ken
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