Dear All,
I have modelled a hard-limiter V-to-I converter (Gm(t)).
I want to add a noise white current noise Source in parallel to it as I= 4*K*T*Gm(t).
Can anybody please tell how to write the code for that ?

My hard-limiter V-to-I converter (Gm(t)) code is as below:-

// VerilogA for VERILOG_A_MODEL, HARD_LIMIT_GM, veriloga

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

module HARD_LIMIT_GM(in,out);
 inout in,out;
 parameter real vtrans = 0;
 parameter real tdelay = 0 from [0:inf);
 parameter real trise = 1p from (0:inf);
 parameter real tfall = 1p from (0:inf);
 parameter real Gm=-5m;
 electrical in,out;
 real vout_val;
 analog begin

        @ (cross(V(in) - vtrans, 1))  vout_val = 1;
        @ (cross(V(in) - vtrans, -1)) vout_val = 0;

        I(out) <+ Gm * transition( vout_val, tdelay, trise, tfall);
 end  
endmodule

Kind Regards,