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<@U04M6NBNPMM> These models are BSIM4, you won’t find the gm, gds, c…., you need to find that by OP ...
# gf180mcu
a
@Stanley Lin These models are BSIM4, you won’t find the gm, gds, c…., you need to find that by OP or DC simulations in NGSpice, but keep in mind some of those values might not be accurate from the simulation
s
Thank you for your help. To be honest I am not quite familiar with BSIM4. I will dig into it.
I just realized that BSIM4 is for MOSFET. How about the BJT if I want to check the gm, gds of those devices. I actually saved the gds of the BJT in OP simulation and I got 0.
a
For BJT, I don’t remember the LEVEL value
I’ll let you know tomorrow
s
Thank you so much. This is very helpful
I just found those parameters in ngspice-38-manual Chapter 31. It turns out the 
gds
of BJT goes by 
go
. And I guess Ngspice is using Gummel-Poon model for BJT.
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