Using noise functions in Verilog-AMS

[GS]

Hello everyone,

I have been trying to use the white_noise and flicker_noise functions
of Verilog-AMS to include noise in my models and ended up facing some
problems.

Actually, I am using the Cadence LDV-5.1 toolset for my simulations and
the Verilog-AMS LRM that comes with the version that I have states that
white_noise, flicker_noise and noise_table have no effect when used in
models.

My question is: Is there a way I can make use of the noise functions to
include noise in my models and simulate using LDV-5.1??

So far, I have been writing my mixed signal models in verilog-ams and
compiling, elaborating and simulating using ncvlog, ncelab and ncsim
respectively.

Thanks,
GS

 

[Prasanna]

Hello GS,

Currently the AMS LRM specifies noise functions only for pure analog
simulations (small signal analysis), not for mixed-signal contexts. For

mixed-signal analysis, the only well defined analysis type is the
transient analysis in the LRM. I have submitted a proposal to deal with

all other analyses types in a mixed-signal context, which is currently
under discussion.

I guess you will have to wait this proposal is accepted in some shape
and the next version of LRM is released (and of course vendors
implement them in the tools).

Hope that helps,
Cheers,
Prasanna