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Variable Pnoise Stop Frequency

IC 6.1.8.090

ADE Explorer

I am running a shooting PSS analysis to determine the output frequency of an oscillator. I also run a PNOISE analysis to report a Jitter measurement based on this PSS.

However, the oscillator output frequency varies over PVT. I would like my PNOISE simulation to have a stop frequency of half the oscillation frequency over corners.

Is this possible (or even reasonable...)? (Taking the calculated oscillator frequency and passing that value to the PNOISE analysis setup.)

Many thanks,

Conor

Andrew Beckett over 5 years ago

Hi Conor,

Right now, this isn't possible. I filed an enhancement request a little while back asking for exactly this:

CCR 1869944 Provide mechanism to sweep sampled pnoise/hbnoise to half pss fundamental for autonomous circuits

It would be a good idea if you contact customer support referencing this CCR (and this post) and ask for a duplicate to be filed - that will help with prioritisation.

Regards,

Andrew.
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Conorp over 5 years ago in reply to Andrew Beckett

Many thanks for your reply Andrew.
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Frank Wiedmann over 4 years ago in reply to Andrew Beckett

The CCR has now been implemented in SPECTRE191 ISR13. Andrew, could you please briefly describe how to use the new feature?
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Andrew Beckett over 4 years ago in reply to Frank Wiedmann

Frank,

I wrote this article, which has a release date of today (to coincide with IC618/ICADVM201 ISR15 which is where it is supported from the ADE UI): How can I set the stop frequency for a sampled pnoise/hbnoise analysis to be half the PSS fundamental? (not sure whether that's visible yet externally).

Andrew.
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Frank Wiedmann over 4 years ago in reply to Andrew Beckett

It's not ("The content you are trying to access has been retired and is no longer available."), but I can wait a few more hours, no problem. Thanks for the quick response.
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