How to plot temperature vs time in Viva?

Dear Stephan,

My thought may be obvious to you, and if it is, please accept my apology in advance!

However, the conventional method to provide the temperature as an output for plotting in ViVA involves either including a file containing the following:

save temp

and then including this file in the netlist. Alternately, you may accomplish the same thing graphically by:

1. Place an unconnected wire in your schematic and set its name to "temp"

2. Add node "temp" as an output to be saved

Either of these will save the temperature as an output that can be plotted. As an example, I used the latter methodology and performed a transient simulation where I used temp as a dynamic parameter to vary its value with time. The example and setup instructions are contained in the note at URL:

www.dropbox.com/.../saving_temp_vs_time_example_081822v1p0.pdf

I hope this was not obvious to you and, perhaps, provides some insight Stephan!

Shawn

Looks cool, but is there also a solution for simple AC or DC simulation? I can't see temperature in Results Browser.

Bye Stephan

How would that help for AC or DC simulation anyway? The temperature won't change during AC or DC unless you sweep temperature, in which case it's the xval() of any output.

Andrew

How would that help for AC or DC simulation anyway? The temperature won't change during AC or DC unless you sweep temperature, in which case it's the xval() of any output.

Andrew

Cool hint. In the mean time I made a little veriloga module:

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

// may show little glitches, might be a Spectre bug?
// In DC: showing only Tj from simulator
// In Tran: Showing dynamic T

// Test for static Tj simulation: ok
// Test for Tj as dynamic parameter: not tested
// Test for Tj set by cds_set_temperature: works basically, but short glitches possible!

module Tmonitor(t); // in should represent T in Celsius

input t;
electrical t;

real temper=0;

analog begin

//@initial_step V(t) <+ $temperature-273.15;

  temper = $temperature-273.15; // function itself is in Kelvin
  V(t) <+ temper;
 
end

endmodule