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Problem in simulation by integrating Random generator with other analog blocks

Analog Design

 Hi ,

 I want to do simulation after integrating  Random generator(Designed in Verilog-A) with other analog blocks. Indivual simulation of Random generator takes less time and gives output within fraction of second . But after integration with other  analog modules(Designed by devices from UMC180nm libraries) , spectre simulator contineously running without completion of simulation. After Some time  It seems to be no completion of simulation ,so I have to  stop simulation before completion . How to overcome this  problem (to complete simulation)? I am donig simulation in Cadence spectre(version ICv5.1)

The design Code like below

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

module noise_src(vout,ref);
output vout;
input ref;
electrical vout,ref;
parameter real amp = 0.2 from [0:inf);
parameter real att = 10 from [0:inf);
integer seed;

analog begin
@ (initial_step) begin
seed=23;
end

V(vout,ref) <+ amp * $dist_normal(seed,0,1)/att;
$display ("seed is %d",seed);
end

endmodule
Parents

  • I'm afraid I don't have the bandwidth to write the model for you. It would probably make sense to read a good book on Verilog A, such as The Designer's Guide to Verilog-AMS

    BTW, how are you replying to posts? Every time you reply, the email notifier is scrambled, and it ends  up as a separate thread (I have to keep going in and merging them). Which web browser are you using (is it Chrome? Because there are known issues with Chrome with this forum).

    Regards,

    Andrew.

Reply

  • I'm afraid I don't have the bandwidth to write the model for you. It would probably make sense to read a good book on Verilog A, such as The Designer's Guide to Verilog-AMS

    BTW, how are you replying to posts? Every time you reply, the email notifier is scrambled, and it ends  up as a separate thread (I have to keep going in and merging them). Which web browser are you using (is it Chrome? Because there are known issues with Chrome with this forum).

    Regards,

    Andrew.

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