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transient noise simulation of PLL

To achieven reliable simulation results, BDA suggests its transient noise simulator users to set the time step 1/20*Tvco for PLL simulation. Does Cadence has similar recommendation for its users for the same situation? If there is, how can I adjust the time step parameter in spectre? I found in spectre user guide that maxtimestep is limited to 1/noisefmax. So I can change time step by increase noisefmax, are there better (more efficient) ways to do that ?

Thanks a lot in advance.

ppvqa

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Ashish Patni over 14 years ago

Hi Ppvqa,
Please have a look at the Transient Noise Appnote on COS using the following link -
http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=wp;q=ApplicationNotes/Custom_IC_Design/Trnoi_AppNote.pdf

Regards,
Ashish
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Ashish Patni over 14 years ago

Hi Ppvqa,
Please have a look at the Transient Noise Appnote on COS using the following link -
http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=wp;q=ApplicationNotes/Custom_IC_Design/Trnoi_AppNote.pdf

Regards,
Ashish
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