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How and where to find Model card used in simulation

skvishvakarma

Hi

I am using IC6.1.6-64b.500.8,  Virtuoso ADEL and ADEXL. I am using a technology file from Taiwan Semicon...' and standard VT devices in my circuit.

When I see the Model file (tech.scs) it has many different model cards with different numbers like  "model pch bsim4 { 1: type=p ...." 2: type pch, 4: type pch....etc."  

Q1.  How to find which  Model card is used for the simulation for each device (ex. two Model cards for two MOSFETs) and it's location during or after simulation??

Q2. If the W/L of MOSFET is changed then will the Model card number (1: type=p  to   2: type pch or 4: type pch....etc)  also changed ??

Actually,  I need to analyse the variation in different variables (VTH0 variation, U0 mobility, Toxe etc...) of Model card used in simulation. Therefore I must know which model cards are used for the simulation for each devices (MOSFET) for each device width W and length L.

Any help is highly appreciated. 

Parents
  • Andrew Beckett

    These models are what are called "binned" models. What that means is that you have one overall definition for the model, but then there are parameters in each of the sub-models to specify the range of width and/or lengths for which they are valid. Depending on the w and l of the device, a particular bin will be found and that's the model it would use.

    After simulation you should be able to use the ocnGetInstancesModelName() function in the CIW to return the mapping of instances to the model name used. If I remember correctly, this will return the bin number as part of the model name. As for the location of the file, it won't tell you that - you have to know from your ADE setup as to where the model files are being included from and look there.

    For your question 2, the answer is yes.

    Andrew.

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  • Andrew Beckett

    These models are what are called "binned" models. What that means is that you have one overall definition for the model, but then there are parameters in each of the sub-models to specify the range of width and/or lengths for which they are valid. Depending on the w and l of the device, a particular bin will be found and that's the model it would use.

    After simulation you should be able to use the ocnGetInstancesModelName() function in the CIW to return the mapping of instances to the model name used. If I remember correctly, this will return the bin number as part of the model name. As for the location of the file, it won't tell you that - you have to know from your ADE setup as to where the model files are being included from and look there.

    For your question 2, the answer is yes.

    Andrew.

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