Stats

  • Locked Locked
  • Replies 1
  • Subscribers 125
  • Views 2342
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

How to get min value of a transistor width/length in a given pdk by skill?

IC Layout

 Hai! I am going to use " tsmcN65nm " technology PDK kit .. and the cadence IC514 version of tool...

Now I have provided with " tsmcN45nm " schematics.. My job is to change all the schematics to refer to the 65nm tech..

I am able to do this task by means of my previous skill codes... In addiotion to this I would like to print a list (in a file/in CIW) of cells which

are having less values (w.l & m) compared to this new technology PDK kit..

Means I would like to know what is the minimum value that a particular transistor will have in each PDK kit..

I have both PDK kits...but our project will go on 65nm kit..

I hope someone will respond to my problem as early as possible........

Thanks in advance

Prabhakar. K -- Layout Engineer 

 

  • With those PDKs you should be able to do:

    ddGetObj("libName" "deviceName")~>minW

    (same for ~>minL) to get the minimum device size. These are properties in the "property bag" for the cell.

    For an instance, you can do:

    instId~>master~>cell~>minL (and minW).

    Note these are returned as strings, so you might want to use cdfParseFloatString() to convert them into actual numbers.

    Best Regards,

    Andrew.

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.