Hpsice noise analysis

[cliffj]

Does anyone know how to use the flicker noise model in hspice ?
I'm now using TSMC 0.35um CMOS process, and flicker noise model for 3V and 5V devices is included from model file. But when I tried to varied the KF and AF factor (NLEV=3) of the model file (hspice flicker noise model level 3 based), the outputs noise voltage showed no difference. (even KF=AF=0 didn't change the output noise voltage at all). Sholud there be any option needed to be turned on or off for running noise analysis ??? Especially flicker noise ...

 

[edajason]

Actually it doesn't make much difference. Kf is about 10e-25,-27.

 

[cliffj]

According to the value I check from TSMC's document, it makes a big difference !!! Especially, for low frequency down to ~kHz or even lower.