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Measurements >> Phase Noise and Jitter Measurements >> Doubt regarding PNOISE results obtained from Spectre-RF
https://designers-guide.org/forum/YaBB.pl?num=1262097621

Message started by shaikh_sarfraz on Dec 29^th, 2009, 6:40am

Title: Doubt regarding PNOISE results obtained from Spectre-RF
Post by shaikh_sarfraz on Dec 29^th, 2009, 6:40am

Hi,
What sort of spectral density is obtained when we do Pnoise analysis.
Is it power spectral density of phase or is it power spectral density of voltage?

Best Regards
Sarfraz

Title: Re: Doubt regarding PNOISE results obtained from Spectre-RF
Post by pancho_hideboo on Dec 29^th, 2009, 7:09am

shaikh_sarfraz wrote on Dec 29^th, 2009, 6:40am:

What sort of spectral density is obtained when we do Pnoise analysis.
Is it power spectral density of phase or is it power spectral density of voltage?

Small signal noise analysis subjected to master steady state large signal analysis give voltage noise, that is, small signal mixing or folding noise.
This is true for any vendor's simulator.

Just we can decompose this voltage noise to AM and PM noises. That's all.

See my appends in the followings.
http://www.designers-guide.org/Forum/YaBB.pl?num=1244213153/6#6
http://www.designers-guide.org/Forum/YaBB.pl?num=1260521995
http://www.designers-guide.org/Forum/YaBB.pl?num=1050465395

Title: Re: Doubt regarding PNOISE results obtained from Spectre-RF
Post by Andrew Beckett on Jan 5^th, 2010, 1:27pm

See also the discussion in http://www.cadence.com/community/forums/T/14375.aspx - ah, it's the same requestor.

Regards,

Andrew.