V DS (V GS V TO)

IDS = KP(V GS V TO)V DS

V DS > (V GS V TO),(V GS V TO) > 0

IDS = KP(V GS V TO)2(1 + λ(V DS (V GS V TO)))

Or...

IDS = KP 1+λ(V GSV TO)(V GS V TO)2(1 + λV DS)

But, I feared that All NG-SPICE

Simulates is:

IDS = KP(V GS V TO)2

Even though NG-SPICE defines

Lambda.