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Design Languages >> Verilog-AMS >> Print Verilog-A subcircuit value using HSPICE
https://designers-guide.org/forum/YaBB.pl?num=1430530076

Message started by Joe Shmoe on May 1^st, 2015, 6:27pm

Title: Print Verilog-A subcircuit value using HSPICE
Post by Joe Shmoe on May 1^st, 2015, 6:27pm

Hi everybody,

I'm using verilog-A to describe a subcircuit which I implement in a HSPICE netlist.

The subcircuit comprises a set of functions that are interdependent. for example:

F1 = V(a,b)*C1
F2 = F1*C2*V(a,b)
F4 = pow(F2,2)*exp(F1/C3)
...
I(a,b) <+ F4 //voltage dependent current source

When I run HSPICE I would like to PRINT several functions of the subcircuit.

What would be the proper command in order to do so?
(I'm running a transient analysis in HSPICE)

something like:
.PRINT TRAN X1.....

Thanks for the input!

cheers,
JS

Title: Re: Print Verilog-A subcircuit value using HSPICE
Post by Geoffrey_Coram on May 4^th, 2015, 6:51am

Do you need it formatted as the output from .PRINT?

Otherwise, you could use $strobe within the Verilog-A module to print; I think that comes out in the standard output from the simulator.

Title: Re: Print Verilog-A subcircuit value using HSPICE
Post by Joe Shmoe on May 4^th, 2015, 8:32am

I would need in the format
.PRINT

any idea how to do that?

Thanks!

Title: Re: Print Verilog-A subcircuit value using HSPICE
Post by Geoffrey_Coram on May 4^th, 2015, 11:21am

You probably need to set up the values you want to print as operating-poing variables. Rather than

real F1, F2, F4;

you declare them with

(* desc="op-pt" *) real F1, F2, F4;

Then you should be able to print them the same way you would print GM for a transistor.

.print dc x1:F1

Title: Re: Print Verilog-A subcircuit value using HSPICE
Post by Joe Shmoe on May 5^th, 2015, 11:34am

That worked out great!

Thanks Geoffrey!