Stats

Locked Locked
Replies 3
Subscribers 126
Views 7157
Members are here 0

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

re-use of impulse response models of n-ports

My intention is to speed up my simulations (envlp) by re-use of impulse response models of the n-ports and I was hoping to get some help on how to preceed!

During the envlp sweeps, I see that the first simulation takes about 40 minutes to for spectre to complete (including calculattion/create impulse response bin files) while the following steps in the sweep take no more than couple of minutes (useing the models). But with no changes/updates of the schematic/N-ports/netlist, on the next sweep once again the first simulation takes about 40 minutes and all the bin files are re-generated on the first run.

Is there a way to force specter to re-use the same bin files it created during the very first impulse response calculation for the coming sweeps?

Thanks!

Parents

ShawnLogan over 2 years ago

Dear Ali Bastami,

Ali Bastami said:
My intention is to speed up my simulations (envlp) by re-use of impulse response models of the n-ports and I was hoping to get some help on how to preceed!

If I understand your question correctly, I think the option to save the impulse response files spectre creates from an S-parameter N-port file already exists and may be selected either through the GUI or through options set in either your .cdsinit file or .cdsenv file.

A recent document detailing how to set the reuse option and the location of the files in your UNIX directory using the ADE GUI may be found on page 68 of the note st URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009g04cEAA&pageName=ArticleContent

The location of the impulse response files may be also set within your .cdsenv or .cdsinit files using the "nportirfiledir" option at URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000tCuTEAU&pageName=ArticleContent

I hope I understood your question correctly and this provides some help Ali Bastami!

Shawn
Cancel
Vote Up 0 Vote Down

Cancel

Reply

ShawnLogan over 2 years ago

Dear Ali Bastami,

Ali Bastami said:
My intention is to speed up my simulations (envlp) by re-use of impulse response models of the n-ports and I was hoping to get some help on how to preceed!

If I understand your question correctly, I think the option to save the impulse response files spectre creates from an S-parameter N-port file already exists and may be selected either through the GUI or through options set in either your .cdsinit file or .cdsenv file.

A recent document detailing how to set the reuse option and the location of the files in your UNIX directory using the ADE GUI may be found on page 68 of the note st URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009g04cEAA&pageName=ArticleContent

The location of the impulse response files may be also set within your .cdsenv or .cdsinit files using the "nportirfiledir" option at URL:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000tCuTEAU&pageName=ArticleContent

I hope I understood your question correctly and this provides some help Ali Bastami!

Shawn
Cancel
Vote Up 0 Vote Down

Cancel

Children

Andrew Beckett over 2 years ago in reply to ShawnLogan

Ali,

in general this should just work - unless something in your environment has turned off the reuse of the impulse response files (and fitting for other interpolation methods). Please contact customer support (you may have done that anyway because as far as I know one of my team is dealing with an impulse response issue from the company you work for; I didn’t check as I’m only on my phone at the moment).

Rregards,

Andrew
Cancel
Vote Up 0 Vote Down

Cancel
Ali Bastami over 2 years ago in reply to Andrew Beckett

Thank you ShawnLogan and Andrew.

I will follow up with customer support!
Cancel
Vote Up 0 Vote Down

Cancel

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.