10.5.1. Characteristic Equation

Try these first

1. 1.

   What does MOSFET stand for?

   Hint

   Think about the full form of the acronym.

2. 2.

   What is the role of the oxide layer in a MOSFET?

   Hint

   Consider its relationship to the gate.

3. 3.

   What does V_th represent in a MOSFET?

   • Voltage at which the MOSFET turns off
   • Threshold voltage for channel conduction
   • Maximum voltage rating

   Hint

   Consider when the channel moves from insulator to conductor.

4. 4.

   True or False: The structure of a MOSFET includes a metal gate, an oxide insulator, and a p-type substrate.

   • True
   • False

   Hint

   Think about the definitions we discussed.

5. 5.

   A MOSFET with a V_th of 3V operates with a V_GS of 8V. What happens if V_GS is decreased to 2V?

   Hint

   Consider the definition of threshold voltage.

6. 6.

   If a certain MOSFET has a width-to-length ratio of 10:1, how does this influence its I-V characteristic?

   Hint

   Think about how area impacts current capacity.