Appendix A
Extracting V θ  Based on the Level 1 model

Different OTF models will be described below. Their advantages and disadvantages are due to different approximations [37]. The underlying compact model was already introduced in Section 2.3,

        βVD-(VG-−-Vθ −-1∕2VD-)
ID,lin = 1+ θ(VG − Vθ − 1∕2VD ).
(A.1)

While β  depends on the effective mobility μeff   , θ  models the mobility saturation with increasing vertical field and Vθ  the threshold voltage.

 A.1 OTF1
 A.2 OTF2
 A.3 OTF3