Transient simulation sweep for thermometer code

You might want to take a look at https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000nX1lEAE and https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009lnUWEAY (which show how to realize binary code).

A better solution (given that this is thermometer encoded) might be a simple VerilogA model. This will do what you want:

// VerilogA for mylib, thermdc, veriloga

`include "constants.vams"
`include "disciplines.vams"

`define thermMax 63
module thermdc(out,ref);
electrical [0:`thermMax] out;
electrical ref;
output [0:`thermMax] out;
inout ref;

parameter integer code=0;
parameter vhi=1.2;
parameter vlo=0.0;
genvar bit;

analog begin
  for (bit=0; bit<=`thermMax; bit=bit+1) begin
    if (code>bit) 
      V(out[bit],ref) <+ vhi;
    else
      V(out[bit],ref) <+ vlo;
  end
end

endmodule

You can then (when creating the view in Virtuoso) create a symbol. I then instantiated this, set a design variable on the code parameter (I called it CODE) and then swept that in ADE - here's part of the waveforms being shown (having problems uploading the image - will try a different route)

Andrew

Here's the plot:

Here's the plot:

Exactly what I needed. Thank you.