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psfascii format

shaarawy2023

when i write a netlist for the noise analysis, the output file noise.noise includes the following data :

"freq" 1.00000
"M0" (
0.00000
0.00000
1.42844e-15
4.95885e-11
4.95900e-11
)
"R0" (
1.22664e-16
1.22664e-16
)
"out" 7.04202e-06
"in" 5.74384e-07
"gain" 12.2601
"freq" 1.25893

how can i know which is the thermal noise and which is the flicker noise?

Parents
  • Andrew Beckett

    You might want to read the forum guidelines. The title of your post is pretty vague (this is nothing to do with a spectre netlist - it's the format of psfascii output from the simulator), and you didn't say that you'd saved the data in psfascii format (I only know that by recognising the format). Or you could have shared what you've got in the netlist and how you ran spectre. Or you could just leave us to try to fill in the gaps and hope that we can read your mind? Maybe I'm being a bit crabby on a Sunday afternoon, but you're much more likely to get a good answer with well-formed questions with sufficient information.

    What you've done is ignore all the useful stuff at the top of the PSF file which describes the structure. This is just the VALUE section; there's the TRACE section which describes what data type each instance is - so there will be a mapping of M0 and R0 to the corresponding model type, and then above that there is a STRUCT definition for each model type which lists (in order) what each entry means. That will list in turn the 5 noise elements for the MOS devices that is M0 (most likely R0 is a simple resistor with thermal noise and total noise).

    Andrew

Reply
  • Andrew Beckett

    You might want to read the forum guidelines. The title of your post is pretty vague (this is nothing to do with a spectre netlist - it's the format of psfascii output from the simulator), and you didn't say that you'd saved the data in psfascii format (I only know that by recognising the format). Or you could have shared what you've got in the netlist and how you ran spectre. Or you could just leave us to try to fill in the gaps and hope that we can read your mind? Maybe I'm being a bit crabby on a Sunday afternoon, but you're much more likely to get a good answer with well-formed questions with sufficient information.

    What you've done is ignore all the useful stuff at the top of the PSF file which describes the structure. This is just the VALUE section; there's the TRACE section which describes what data type each instance is - so there will be a mapping of M0 and R0 to the corresponding model type, and then above that there is a STRUCT definition for each model type which lists (in order) what each entry means. That will list in turn the 5 noise elements for the MOS devices that is M0 (most likely R0 is a simple resistor with thermal noise and total noise).

    Andrew

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