Guess:[4, 39.2, 46, 3.7]
Fit:[ 4.60024928 46.24058041 33.81366627 -0.56038166]

InflPointLoc:616
LinVoltageSpace[InflPointLoc]:-8.53 V
AzoozUfl:-96.59 V
DataIndex(20.00 V):-46.93 V

Guess:[3.02, -65, 20, 0.02]
Fit:[ 3.02283504 -64.6944948 20.70055481]
$I_{sat}=$3.02

Guess:[3.02, -65, 20, 0.02]
Fit:[ 1.39924745e+00 -6.43459058e+01 9.56811288e+00 2.41859501e-02]
$I_{sat}=$1.40