I tried to design a simple circuit that include a standard qucs library n-type mosfet (without any modification) to drive a resistive load. With the parameter sweep I 'changed' the gate voltage so to 'monitor' the change of state of the mosfet itself. What I noticed after several simulation run is that the mosfet it's not 'changing' it's status even if I get far over Vt0 value (that I'm assuming it's the Vgs threshold value).
What's wrong? I'm quite new in Qucs and I'm not able to investigate deeply into mosfet model. Is that a way to get it to work as 'real' mosfet do?