Geoffrey_Coram
|
In BSIM3v3 standard, there are two flicker models, selected with the NOIMOD parameter. One is the old "spice2" model, KF Id^AF / f^EF. The other is the "unified 1/f model" which uses NOIA, NOIB, and NOIC.
HSpice added the NLEV=3 (gm) model, and apparently Spectre has added it as well.
I'm not sure what happens if you specify flkmod=1 without nlev=3, or under what conditions these settings override the NOIMOD from the standard BSIM3v3.
But it does seem to me that if NLEV=3 is specified, flkmod=1 should be as well. (One could argue that specifying NLEV should automatically change the default for flkmod, perhaps this is true in the version of Spectre used by the foundry.)
|