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Layout netlist extraction

PietroUser

Hello,

is there a simple way to extract the netlist from a layout without parasitics without doing the full LVS with Assura?

I am writing the extract.rul file and searching for a way to debug it.

 

Thanks,

 

Pietro

  • Hi Pietro

    Using an LVS/ERC tool to extract a layout netlist is already the most simple method. There is no need to do a full LVS. Just you only require the layout netlist, you can just use an empty cdl netlist or a dummy schematic for the LVS. Layout netlist can then be obtained as follows:

    terminal>vldbToCdl design.ldb > design_layout.cdl


    Best regards
    Quek

  • Hi Quek,

    I tried the command vldbToCdl design.ldb to extract the cdl for the gds. But it gives only the following output in the terminal,

    *.LDD

    Please help me on this.

    Regards,

    Karthik.

  • Hi Karthik

    [In future, please kindly create a new thread for your own question. This is to allow us to concentrate on only your issue and not be confused by past issues which are not related to you]

    Would you please let us know the following?

    a. Version of Assura
    terminal>assura -W

    b. How about this?
    terminal>vldbToCdl design.sdb
    terminal>vldbToCdl design.snn
    terminal>vldbToCdl design.lnn

    terminal>vldbToSpice design.ldb

    Please note that you have to replace "design.abc" with the actual filename.


    Best regards
    Quek

  • Hi Quek,            

    Thanks for your immediate response. I do create new thread hereafter, sorry for that. These are the results I got in my terminal. 

    For, 

    1)vldbToCdl design.sdb

                       There is some device information like widh length multiplier                                                                                                                                                                                                                                

    2)vldbToCdl design.snn

    Same as in previous command.

    3)vldbToCdl design.lnn

    *.LDD

    4)vldbToSpice design.ldb

    *.LDD

    Regards,

    Karthik

  • Hi Karthik

    I think either your layout is empty or something went wrong during the layout extraction. Would you please check the Assura log file for errors during layout extraction?

    Best regards
    Quek

  • Hi Quek,

    Thanks. I will check for assura log file.

    Regards,

    Karthik.

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