I output in simvision

When I simulate a design in verilog-ams, using Simvision, I am able to
see the "potential - V" value for the signals( that belong to
"electrical" discipline). Is there a way by which I can see the "flow
- I"( current) value for the signal ?

regards,
Vineet.

 

You need to use the -flow option to the probe command. Something like:

probe -create -shm -flow -ports top.I0

This is covered in the AMS Simulator User Guide KP&S (I think that's where it
is).

In essence you need to tell the simulator to probe currents - it does this
efficiently, because it already knows the currents because of the fact that
the simulator is preserving Kirchoff's current law.

Regards,

Andrew.

 

Thanks Andrew.
Is -flow an option available from recent releases ? Coz I am not able
to see this option when I do a probe -help in AMS simulator. And when
I run the command anyways, I get "*E,UNKOPT: unrecognized option for
the probe [-create] command (-flow)."

I have the 4.0 version of the tool.

regards,
Vineet.

 

Hi Vineet,

Yes, it is a relatively recent addition - I think it may have been in
LDV50, I don't remember (it might have been a hotfix of LDV40?)

Before that the alternative is to put save statements into your analog control
file to save the currents you want (in spectre syntax).

But a better solution would be to move to using LDV51, I'd say, if you
can.

Regards,

Andrew.