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 top cell in gds file 

Last post Wed, Jan 6 2010 4:03 PM by Andrew Beckett. 1 replies.
Started by Claes 06 Jan 2010 03:34 PM. Topic has 1 replies and 1896 views
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  • Wed, Jan 6 2010 3:34 PM

    • Claes
    • Not Ranked
    • Joined on Wed, Jan 6 2010
    • Posts 4
    • Points 180
    top cell in gds file Reply

    Hello all,

    I received a gds file butt no information on what is the top cell. How can I figure out what the top-cell name is before I can stream in my file into Virtuoso?

    Thanks in advance,

    Regards ,Claes 

    • Post Points: 20
  • Wed, Jan 6 2010 4:03 PM

    Re: top cell in gds file Reply

    Hi Claes,

    If you omit the top cell name on the stream in form, it will import ALL the cells in the stream file. So you really don't need to know the cell name up front. If you specify the top cell name, it only imports that cell and all the cells within its hierarchy, so can be used to import a subset of the file.

    You could use the "ascii dump" option of import stream to look at the contents - and from this infer whether any particular cell has been referenced or not - if there are no references, it's likely to be the top cell. 

    But it may just be simpler to import the whole file, and then look to see what is a likely name for the top cell. Or just ask whoever provided the GDS file!

    Regards,

    Andrew.

    • Post Points: 5
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Started by Claes at 06 Jan 2010 03:34 PM. Topic has 1 replies.