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How to edit NMOS/PMOS W/L of an inverter layout using SKILL code

skvishvakarma

Hi

I am using Virtuoso IC6.1.6.

I would like to parameterize an inverter layout for automatic layout design from it's schematic.

Therefore I am trying to edit of NMOS/PMOS W/L of an inverter using skill code in following way:

1. I am using instances (NMOS/PMOS pcells) from technology file (ex. umc, tsmc or gpdk) and made a inverter layout.

2. I want to edit 'width/length' of NMOS/PMOS using skill code

Please let me know how can I write a skill code for the above case.

 I would be glad if you may provide some examples or test case.

Looking forward to see a quick response.

Thanks.

Parents

  • Hi,

    I would start by looking at the sample ROD PCells in your installation, for example <instRoot>/tools/dfII/samples/ROD/rodPcells/components/inv/inv.il which in turn instantiates/uses spcnmos and spcpmos devices.  There is an "install" directory that you can use to set up and load the devices so you can take a look and play with what's provided.  There is a fair amount of code here though, so you may need to reduce it down to a simpler version.

    Hopefully this can help to get you started?

    Best regards,

    Lawrence.

Reply

  • Hi,

    I would start by looking at the sample ROD PCells in your installation, for example <instRoot>/tools/dfII/samples/ROD/rodPcells/components/inv/inv.il which in turn instantiates/uses spcnmos and spcpmos devices.  There is an "install" directory that you can use to set up and load the devices so you can take a look and play with what's provided.  There is a fair amount of code here though, so you may need to reduce it down to a simpler version.

    Hopefully this can help to get you started?

    Best regards,

    Lawrence.

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