13.2. I-V Characteristic of MOSFET

Try these first

1. 1.

   What is the threshold voltage in a MOSFET?

   Hint

   Think about what voltage is needed for current to start flowing.

2. 2.

   What happens to the current in the saturation region?

   Hint

   Consider how changes in voltage affect current in this region.

3. 3.

   What is the primary role of threshold voltage in a MOSFET?

   • To define the maximum voltage
   • To determine device turn-on
   • To measure channel length

   Hint

   Think about what voltage is needed for the MOSFET to start operating.

4. 4.

   True or False: In the saturation region, the current changes significantly with V_DS.

   • True
   • False

   Hint

   Recall the characteristics of the saturation region.

5. 5.

   If a MOSFET has a threshold voltage of -1.5V and V_GS = -3V, what happens if V_DS is 0V? Analyze the situation.

   Hint

   Consider what voltage levels are needed for conduction.

6. 6.

   Given a n-MOSFET with parameters K = 200 uA/V^2, V_th = 1V, calculate the current I_D when V_GS = 4V and V_DS = 3V, confirming which region it's in.

   Hint

   Ensure you calculate which region the device operates based on the relationship between V_DS and the threshold.