Stats

  • Locked Locked
  • Replies 0
  • Subscribers 125
  • Views 13265
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Parametric sweep and specific data extract for waveform plot

quasilog

Hi All,

I am characterizing BSIM3v3 MOS using OCEAN+SPECTRE for gm/id design methodlogy (Boris Murmann specified way)

For that i ran a dcsweep (Vgs)+parametric sweep(L). OCEAN snippet:
 

analysis('dc ?saveOppoint t ?param "gs" ?start "0.25"
?stop "1.25" ?step "25m" )
paramAnalysis("length" ?values '(1.8e-07 2.3e-07 )
)
paramRun()


Now I could plot Vov(x-axis) vs gm/id(y axis) using


ov_n = (v("MN.m1:vgs" ?result "dc-dc") - v("MN.m1:vth" ?result "dc-dc"))
gm_id_n = (getData("MN.m1:gm" ?result "dc-dc") / getData("MN.m1:ids" ?result "dc-dc"))
ov_n_VS_gm_id_n = abChangeXAxis(gm_id_n ov_n)
plot(ov_n_VS_gm_id_n)


Now i want to plot Length (x-axis) vs Cgg(y-axis) (assuming Cgg is also saved by "save MN.m1:cgg") for a CONSTANT gm/id (as done by Boris Murmann using MATLAB). I want to do it purely in OCEAN/SKILL for simplicity.

It would be really nice if anybody could give some suggestion (e.g. OCEAN code) to plot the desired waveform. I tried with selectResults() OCEAN function but with little success.


Thanks for your cooperation.

Akbar Momin

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.