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https://designers-guide.org/forum/YaBB.pl Measurements >> Phase Noise and Jitter Measurements >> difference between "pnoise-->Phase Noise" and "pnoise jitter--> Phase Noise" https://designers-guide.org/forum/YaBB.pl?num=1224684553 Message started by OpAmp on Oct 22nd, 2008, 7:09am |
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Title: difference between "pnoise-->Phase Noise" and "pnoise jitter--> Phase Noise" Post by OpAmp on Oct 22nd, 2008, 7:09am After doing a jitter simulation using PSS+Pnoise simulation on an oscillator, in the “Direct Plot Form” in “Affirma Analog Design Environment”, there are four analysis: “pss”, “pnoise”, “pnoise modulated” and “pnoise jitter”. We can plot phase noise of the oscillator with two different methods: 1- Analysis=pnoise, Function=Phase Noise 2- Analysis=pnoise jitter, Function=Phase Noise The result of the second approach is 3dB higher. Can somebody explain for me the difference? Thanks |
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Title: Re: difference between "pnoise-->Phase Noise" and "pnoise jitter--> Phase Noise" Post by Sinner on Dec 19th, 2008, 2:37am I am not sure about the Analysis.. But with the result that you have given I think 1 result is for SSB noise and the other being DSB, thereby the 3dB difference. |
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Title: Re: difference between "pnoise-->Phase Noise" and "pnoise jitter-- Post by pancho_hideboo on Dec 19th, 2008, 5:21am OpAmp wrote on Oct 22nd, 2008, 7:09am:
1 is SSB SideBand Noise. This is small signal mixing noise, that is, sideband noise which include both AM and PM noise. 2 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". See followings. http://www.designers-guide.org/Forum/YaBB.pl?num=1223659963/1#1 http://www.designers-guide.org/Forum/YaBB.pl?num=1220755065/1#1 |
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