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FreePDK45 model files

emax

With NCSU FreePDK45 only hspice model files are available and was wondering if someone has put effort for Spectre model files to be freely available? The Spectre simulator cannot be used with hspice model files and the hspiceD simulator is not supported by Cadence and we need to install that separately?

Another question, is it possible to use netlist generated by Calibre PEX extraction tool directly? I heard we need to generate Calibre View using PEX and then it can be used in Config View, is that correct? If that is true can we simulate the Calibre View using Spectre for FreePDK45 or still we need hspiceD simulator?

  • A few points:

    1. It's probably best to ask NCSU about their PDK rather than asking in a Cadence forum! I have (virtually) knowledge of the NCSU kit (at least not current information).
    2. Spectre can read hspice model files and has been able to do so for a long time.
    3. hspiceD is supported by Cadence; the interface is a Cadence product (product number 32760) which is part of the IC installation and does not need any external installation.
    4. You can include SPICE netlists produced by extraction tools such as Calibre PEX, however, commonly simulation is done using the extracted views produced by Calibre, QRC etc. However, whether those work with spectre will equally depend on the PDK being set up to work with spectre and appropriate models being delivered - if a pre-layout design doesn't work with spectre, you wouldn't expect a post-layout view to suddenly work.

    Regards,

    Andrew.

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