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How do you annotate region of operation for NMOS transistors in Cadence Virtuoso?

ocho

Virtuoso version: IC6.1.6.500.13.2

I am trying to: print region of operation for all NMOS transistors on my circuit schematic.

Pictures attached: circuit schematic, annotation setup

Here's what I have so far:

1) View -> Annotations -> Setup

2) Annotation Settings for: Library (analogLib), Cell (nmos)

3) Clicked on a green plus on top left corner to add a new Label

4) Changed Display Mode of newly created label to "Component Parameter"

5) Changed Expression to "region"

From here on out, all I thought I'd have to do is check the "Annotate" box and then I'd be good to go. However, I cannot check the box. It won't let me. Does anyone understand the problem? 

Parents

  • The number of parameters that can be annotated is governed by the number of cdsParam(N) labels on the symbol itself. It looks in this case as if there are 3 - which is why the fourth shows up in a different colour on the form. That depends on how the symbols are defined in your process design kit.

    If you go to the column headings on the annotation->setup form, you can do Right Mouse->Balloon Column (or you can use File->Show Balloons which would also cause the column to appear). Any of the annotations beyond the maximum number of labels can have the Balloon column checked - and if balloons are being shown (which is what File->Show Balloons does), then hovering over the transistor on the schematic would show a balloon with the information you want.

    Regards,

    Andrew.

Reply

  • The number of parameters that can be annotated is governed by the number of cdsParam(N) labels on the symbol itself. It looks in this case as if there are 3 - which is why the fourth shows up in a different colour on the form. That depends on how the symbols are defined in your process design kit.

    If you go to the column headings on the annotation->setup form, you can do Right Mouse->Balloon Column (or you can use File->Show Balloons which would also cause the column to appear). Any of the annotations beyond the maximum number of labels can have the Balloon column checked - and if balloons are being shown (which is what File->Show Balloons does), then hovering over the transistor on the schematic would show a balloon with the information you want.

    Regards,

    Andrew.

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