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Display operating point

santoshvema
Hi, I am using CMOS 90nm technology in cadence and I just wonder how I can display the region of operation, gm, and id etc for my transistors. I tried the same steps that we used to do for cmosp18 technology in cadence but I couldn't succeed. Thanks. -Santosh
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  • tkhan

    Hi,

    I tried the method described skillUser but for another PDK (ibm cmos8rf 130nm) and it still wouldn't display the op points that I wanted. I suppose you need to have write permissions on the PDK to change CDF parameters?

    I'm curious if santoshvema and naderi are studying at Canadian schools like myself? In that case I don't think its possible to modify the PDK because we have a network installation of the PDK and Cadence tools. Best to check with your STC and try to get a local installation of the PDK.

    Also if you're doing a DC sweep you might want to load a .scs file with something along the lines of 

    save * sigtype=all

    to save the results of the entire parameter sweep. Then you can check tools->results browser->dc-dc to see how all the dc op points vary with the parameter being swept. (that particular command might be a bit overkill, check spectre -h save for a more appropriate save command)

     

     

Reply
  • tkhan

    Hi,

    I tried the method described skillUser but for another PDK (ibm cmos8rf 130nm) and it still wouldn't display the op points that I wanted. I suppose you need to have write permissions on the PDK to change CDF parameters?

    I'm curious if santoshvema and naderi are studying at Canadian schools like myself? In that case I don't think its possible to modify the PDK because we have a network installation of the PDK and Cadence tools. Best to check with your STC and try to get a local installation of the PDK.

    Also if you're doing a DC sweep you might want to load a .scs file with something along the lines of 

    save * sigtype=all

    to save the results of the entire parameter sweep. Then you can check tools->results browser->dc-dc to see how all the dc op points vary with the parameter being swept. (that particular command might be a bit overkill, check spectre -h save for a more appropriate save command)

     

     

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