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Cadence ADE Simulating .spi of Standard Lib using Spectre

tstoll

 Hi -

I have a PDK in which I have all standard cells (inverters, nands,etc.) defned in one common .spi file.
I have standardlib symbols and used them within my analogic schematic for simulation.

I defined on the toplevel global vdd!, gnd!, and also used CDF (VDD netSet vdd!, and VSS netSet gnd!) to be sure that the instantiated inverter has its correct supply and ground voltage.

The .spi standard Lib file I included via the Simulation Files Setup menue (Stimulus File).

It is netlisting and simulating.. but the inverter is not inverting.. the output follows exactly the input.

Any hint on that?

I do not know if that has something to do with it, but at the beginning, I see in the simulation log file following message:

" Unable to compile ahdlcmi library, see input.ahdlSimDB..
" Could not open ahdlcmi module library input.ahdlSimDB.."

I appreciate every comment !!

Cheers,
tOM

Parents
  • tstoll

     Hi Andrew -

     There are just 2 pins in the .spi file:

      .SUBCKT INV1 Y A

    *|GROUND_NET VSS

    *|NET Y 0.000582552PF
    Cg1 Y VSS 5.82552e-16

    *|NET A 0.000545819PF
    Cg2 A VSS 5.45819e-16

    *
    * Instance Section
    *
    MM2 Y A VSS VSS NCH_TN ad=0.294p as=0.608p l=0.18u pd=2.18u ps=4.53u w=0.6u
    MM1 Y A VDD VDD PCH_TN ad=0.445p as=0.83p l=0.18u pd=2.79u ps=5.59u w=0.9u

    .ENDS

     

     In the netlist of ADE it looks like:

     I37 (net026 net023) INVX1

     

    --> if I give it a CDF parameter for VDD and VSS.. where does that info stand in the netlist?

     

    tOM

     

     

Reply
  • tstoll

     Hi Andrew -

     There are just 2 pins in the .spi file:

      .SUBCKT INV1 Y A

    *|GROUND_NET VSS

    *|NET Y 0.000582552PF
    Cg1 Y VSS 5.82552e-16

    *|NET A 0.000545819PF
    Cg2 A VSS 5.45819e-16

    *
    * Instance Section
    *
    MM2 Y A VSS VSS NCH_TN ad=0.294p as=0.608p l=0.18u pd=2.18u ps=4.53u w=0.6u
    MM1 Y A VDD VDD PCH_TN ad=0.445p as=0.83p l=0.18u pd=2.79u ps=5.59u w=0.9u

    .ENDS

     

     In the netlist of ADE it looks like:

     I37 (net026 net023) INVX1

     

    --> if I give it a CDF parameter for VDD and VSS.. where does that info stand in the netlist?

     

    tOM

     

     

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