Is there any way to generate random values with VerilogA for a SPECTRE's DC analysis?
The $random function is evaluated at every timestep. It gives a good random number during a transient analysis, but its values for DC and t=0 in transient is always the same.

In general I am curious whether something like is possible to achieve with VerilogA, because it was a surprise to me, that I found no solution.

I do not know which random function could I use. The random functions in VerilogA require a seed. Generating a random seed will have the same problem as I already have.

I've looked in different ways as well, but to no avail:
I haven't found a way to call a system function. I tried using the $simparam("systime") as a seed, but its resolution (1sec) wasn't random at all.
I also have not found (yet) a reliable way in our flow to execute a script between netlisting and simulation to insert a random value.

Therefore I would very grateful for any small working example.

Here is an example of mine:

Code:

`include "discipline.h"
`include "constants.h"

module rand_bit_simple (vout);
output vout;
electrical vout;
parameter integer seed = 21;
integer var_seed;
integer rnd;

   analog begin
      @ (initial_step) begin
        var_seed = seed; // variable is needed; updated after every step
        rnd = $random(var_seed);
      end // initial step

      V(vout) <+ rnd*1e-12;

    end //analog
endmodule