12.5.2. Basic Structure of the p-MOSFET

Try these first

1. 1.

   What is the primary charge carrier in a p-MOSFET?

   Hint

   Think about the type of semiconductor material used.

2. 2.

   What type of doping does the source and drain region have in a p-MOSFET?

   Hint

   Consider the naming convention of the device.

3. 3.

   What type of voltage is required for the gate of a p-MOSFET?

   • Positive Voltage
   • Negative Voltage
   • Zero Voltage

   Hint

   Reflect on the charge carriers and their relation to the applied voltages.

4. 4.

   True or False: The source in a p-MOSFET is always at a lower potential than the drain.

   • True
   • False

   Hint

   Consider the general flow of current from source to drain.

5. 5.

   Design a circuit using a p-MOSFET to switch on an LED. Describe the biasing required and how current will flow through the device to operate the LED.

   Hint

   Consider how voltage levels affect the operation and switching of the p-MOSFET device.

6. 6.

   Analyze the effect of increasing the gate-source voltage (V_SG) in a p-MOSFET. Discuss how it affects the channel conductivity and current flow.

   Hint

   Think about how charge carriers respond to voltage changes.