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Measurements >> Phase Noise and Jitter Measurements >> Transiant Noise analysis ?
https://designers-guide.org/forum/YaBB.pl?num=1209643110

Message started by XY-oriented on May 1^st, 2008, 4:58am

Title: Transiant Noise analysis ?
Post by XY-oriented on May 1^st, 2008, 4:58am

Hi every one...
dose any body know if spectre handle Transiant Noise analysis ? and how ?
pnoise analysis is of no help for me because I want to measure accumulated jitter ...

thanks for your help !

Title: Re: Transiant Noise analysis ?
Post by ACWWong on May 1^st, 2008, 7:03am

Spectre does have transient noise.
For periodic circuits pnoise can still be used to predict accumulated jitter.
Have you see the analysis section of this website ?
try http://www.designers-guide.org/Analysis/PLLnoise+jitter.pdf

Title: Re: Transiant Noise analysis ?
Post by XY-oriented on May 2^nd, 2008, 8:30am

thanks for your replay ACWWong !
I know very well the pnoise analysis and Ken papers on that.... it just does not applay for my case.

I searched spectre docs and didn't found anything about transient noise analysis...I guess I don't have the right version

Title: Re: Transiant Noise analysis ?
Post by pancho_hideboo on May 2^nd, 2008, 8:39am

In Cadence Spectre, Transient Noise Analysis and Time Domain Noise Analysis exist.

Time Domain Noise Analysis is unique feature of SpectreRF(PSS/Pnoise).
http://www.designers-guide.org/Forum/YaBB.pl?num=1207830622/4#4

On the other hand, almost all simulator have transient noise analysis, e.g. ADS, Eldo, Spectre.

Do you intend a transient noise analysis or a time domain noise analysis ?

New Features in the MMSIM6.0 Release
Transient Noise
Transient noise provides the benefit of examining the effects of large signal noise on many
types of systems. It gives you the opportunity to examine the impact of noise in the time
domain on various circuit types without requiring access to the SpectreRF analyses. This
capability is an extension to the current transient analysis, and is accompanied by
enhancements to several calculator functions, allowing you to calculate multiple occurrences
of measurements such as risetime and overshoot. Spectre provides both a single run and
multiple run method of simulating transient noise. The single run method, which involves a
single transient run over several cycles of operation, is best suited for applications where
undesirable start-up behavior is present. The multiple run method, which involves a statistical
sweep of several iterations over a single period, is recommended for users who are able to
take advantage of distributed processing.
For more information, see Calculating Transient Noise in Chapter 6 of the Spectre Circuit
Simulator User Guide.