Stats

  • Locked Locked
  • Replies 7
  • Subscribers 132
  • Views 17836
  • 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

Assura QRC exclude nets

stuso

Hi there,

this is probaly an easy Q for you guys but is it straight forward to exclude specific nets from assura QRc extraction? I guess it's possible to to this with R or C or RC extract as well.

Looking at the QRC Run Form and "extraction" tab i see an option for Net Selection Type with a few options:

Full Chip All Nets

Full Chip Selected Nets

 ...etc

so it seems logical thet "Eluded Nets" might be the option i require. But next to this there is  another field for "QRCFS Extraction Mode" Shoud i alter this?

Then i assume i should then select from schematic all the nets i want to exclude.

We are playing about with this & reading the manual but its not working as we expect, any suggestions are welcome.

Thanks

Stu

 

 

 

 

 

 

 

Parents
  • Quek

    Hi Stu

    Your observation is correct. For "Excluded nets" mode, R, L and K will not be extracted for the listed nets but C will still be extracted. This is also explained in QRC user guide.

    There is no need to modify the settings of QRCFS. QRC FS (field solver) can give highly accurate capacitance extraction for critical nets at the expense of much longer runtimes. To use QRCFS, there should be a file named "rcxfs.dat" in your QRC tech directory.

    Best regards
    Quek

Reply
  • Quek

    Hi Stu

    Your observation is correct. For "Excluded nets" mode, R, L and K will not be extracted for the listed nets but C will still be extracted. This is also explained in QRC user guide.

    There is no need to modify the settings of QRCFS. QRC FS (field solver) can give highly accurate capacitance extraction for critical nets at the expense of much longer runtimes. To use QRCFS, there should be a file named "rcxfs.dat" in your QRC tech directory.

    Best regards
    Quek

Children
No Data

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.