Stats

  • Locked Locked
  • Replies 1
  • Subscribers 126
  • Views 13497
  • 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 Back Annotation Question

jimstuy

Hi all,

   I have a question regarding parasitic extraction in Assura-QRC and what is back annotated into the schematics. I am designing and layout the MDAC capacitor array for a pipelined ADC. I see that for each net in schematic view there are annotated values that sums up total parasitic capacitance at that node. However, I want to know how much of it is Cpar to substrate, and how much is trace to trace capacitance (I have a lot of traces routed minimally spaced to each other on the same metal layer so there will be a degree of coupling). This will allow me more insight into debugging my current design. I have selected "coupled" option when Assura-QRC was run, but not sure how I can select two arbitrary nets and see how much coupling it's extracting.. Any help is greatly appreciated. Thanks!

Jim

  • Quek

    Hi Jim

    You can use "Parasitics->Report" function to report net-to-net parasitiscs too. : )  Please refer to $CDSHOME/doc/paramsim/paramsim.pdf.


    Best regards
    Quek

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.