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Simulators >> RF Simulators >> different phase noise results in spectre
https://designers-guide.org/forum/YaBB.pl?num=1223659963

Message started by qad on Oct 10^th, 2008, 10:32am

Title: different phase noise results in spectre
Post by qad on Oct 10^th, 2008, 10:32am

Hi all,
I just go through the example "Measuring Jitter with Pss and Pnoise Jitter Analyses" in cadence doc "SpetreRF simulation option user guide". In the Direct Plot Form, I try Function "Phase noise" in both "pnoise jitter" analysis and "pnoise" analysis. These two plots have 3dB difference. Please anyone can explain the difference? Thanks
qad

Title: Re: different phase noise results in spectre
Post by pancho_hideboo on Nov 22^nd, 2008, 5:32am

qad wrote on Oct 10^th, 2008, 10:32am:

In the Direct Plot Form, I try Function "Phase noise" in both "pnoise jitter" analysis and "pnoise" analysis.
These two plots have 3dB difference.

Latter, "pnoise" is SSB SideBand Noise.
Former, "pnoise jitter" is twice of latter.

Latter, "pnoise" is small signal mixing noise, that is, sideband noise which include both AM and PM noise.

Former, "pnoise jitter" is phase noise.
Agilent GoldenGate give same result as "pnoise jitter" and as another results, there are "side_band_left" and "side_band_right" which are same as "pnoise".

http://www.designers-guide.org/Forum/YaBB.pl?num=1220755065/1#1