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Measurements >> Phase Noise and Jitter Measurements >> Can not match pnoise/jitter results
https://designers-guide.org/forum/YaBB.pl?num=1207157998

Message started by jimmy on Apr 2^nd, 2008, 10:39am

Title: Can not match pnoise/jitter results
Post by jimmy on Apr 2^nd, 2008, 10:39am

Hi,

Ken mentioned in http://www.designers-guide.org/Forum/YaBB.pl?num=1036525104/0,

that what we got by clicking "pnoise" button when using "noisetype=source" for driven circuit is actually not phase noise but L = Sv(df)/(2*V1^2), Sv(df) is the voltage noise power density. Now I am confused how can I get phase noise in such case. Basically what I am trying to do is to compare the phase noise/jitter simulation results between different noise type settings (modulated, source, jitter, time domain). For modulated and source noise types, I should be able to get phase noise, then I can convert it to jitter; For jitter and timedomain noise types, I should be able to get jitter then convert to phase noise. Either way, the numbers I get should be the same (or very close), right?

Thanks a lot,

Title: Re: Can not match pnoise/jitter results
Post by chenyan on Apr 26^th, 2008, 2:09am

there is no accurate formula to convert phase noise to jitter, not to mention from jitter to phase noise. So how did you do the conversion?

Title: Re: Can not match pnoise/jitter results
Post by Miconos on Jun 29^th, 2008, 12:29am

Jitter can be translated to integrated phase noise and vice versa. is that what you are looking for