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Simulators >> Circuit Simulators >> weird pnoise waveform, advise needed
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Message started by subgold on May 29^th, 2012, 1:13am

Title: weird pnoise waveform, advise needed
Post by subgold on May 29^th, 2012, 1:13am

Hi all,

I have got a strange noise spectral density plot from a pnoise simulation. Please see the attached picture:

The blue curve is a typical simulation which looks normal, while the red curve is the result at one specific corner, which shows a big fluctuation and looks doubtful.

Could somebody give a clue about what is going on at that strange corner? (i am using cadence version ic6.1.5), thanks.

Title: Re: weird pnoise waveform, advise needed
Post by Geoffrey_Coram on May 29^th, 2012, 9:08am

Are you sure your PSS converged fully?

Title: Re: weird pnoise waveform, advise needed
Post by raja.cedt on May 29^th, 2012, 12:05pm

check how PSS result looks like??? Even before try to run transient sim in that corner, i guess some thing wrong with that corner