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Spectre MDL help for "noise" analysis

Hi,

I am running MMSIM 15.10.766.

mdlref.pdf says that MDL supports noise analysis, but I do not see a (good) MDL example for noise analysis in this or other related docs I found.

I am able to run the noise analyis by MDL, but I have not been able to extract, for example, the output noise current parameters.

A sample netlist is attached at the end of this message. Run a simulation, and a .raw file will be generated in the nutmeg ascii format. How do I use MDL to obtain/access, for example, the "out" variable, as shown in the .raw file?

Thanks.

===========================================================
// MOSFET noise

simulator lang=spectre

op_1 options rawfmt=nutascii

model nmos1 bsim4 type=n

m1 (d g s b) nmos1 w=1u l=0.12u
v_probe (d d0) vsource dc=0
vd (d0 0) vsource dc=0.05
vg (g 0) vsource dc=0.5
vs (s 0) vsource dc=0
vb (b 0) vsource dc=0

noise_1 noise oprobe=v_probe iprobe=vg values=[1e3]
===========================================================

sn4c over 5 years ago

Got help from Cadence support:

alias measurement runnoise {

export real input_noise, output_noise,

rms_output_noise, rms_input_noise;

run noise(start=1, stop=1G, dec=10, iprobe=V7, terminals={"OUTP"}) ;

input_noise = runnoise:in;

output_noise = runnoise:out;

rms_output_noise = rmsnoise(runnoise:out);

rms_input_noise = rmsnoise(runnoise:in);

export real noise_factor = runnoise:F;

export real noise_figure = runnoise:NF;

export real noise_at_freq = (runnoise:out) @ 1k;

export real avg_noise = avg(runnoise:out);

export real max_noise = max(runnoise:out);

}

run runnoise

Please refer the section “Running Noise Analysis” in the below provided link for more details with database:

Advanced SpectreMDL Simulation

https://support.cadence.com/apex/articleattachmentportal?id=a1O0V000009Mo6NUAS&pageName=ArticleContent&attachId=0690V000006NMrxQAG&sq=null
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