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Connecting dummy transistors

Grover

When I use Modgen to add dummy devices to the edges of a matched transistor array, I get an options window (appropriately called "Dummy Options") which has options to choose the dummy type and the net to which the dummy should be connected. I assume that this means that the gate and source of the dummy will be connected to whichever net I choose here, so for NMOS dummies I choose "vss". However, when I subsequently use the device in Layout, the dummy's gate and source are connected to the drain of its neighbour, and not to the net I just selected (vss).

So how can I choose which net to connect the dummy to, if it's not the option in the Dummy Options dialogue?

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  • Hi Grover

    I did some testing using IC614.501 and could not reproduce the problem which you have described. My dumy gate and source nets are just as what I have specified in the dummy options form. Perhaps you would like to retry using this version and let us know if it still does not work for you.

    Best regards
    Quek
Reply
  • Hi Grover

    I did some testing using IC614.501 and could not reproduce the problem which you have described. My dumy gate and source nets are just as what I have specified in the dummy options form. Perhaps you would like to retry using this version and let us know if it still does not work for you.

    Best regards
    Quek
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