12.2. Prof. Pradip Mandal

Try these first

1. 1.

   What type of charge carriers are used in p-channel MOSFETs?

   Hint

   Consider what type of carriers are found in p-type materials.

2. 2.

   State the gate-source voltage needed to turn on a p-channel MOSFET.

   Hint

   Think of the polarity needed for the MOSFET to allow hole movement.

3. 3.

   What type of charge carriers are utilized in p-channel MOSFETs?

   • Electrons
   • Holes
   • Neutrons

   Hint

   Remember the type of doping used in p-type materials.

4. 4.

   True or False: The higher potential side should be on the gate for p-channel MOSFET operation.

   • True
   • False

   Hint

   Think about the needs for hole attraction in the device.

5. 5.

   For a p-channel MOSFET with a threshold voltage of -2V, calculate the drain current with a gate-source voltage of -5V and a drain-source voltage of -10V, given a mobility coefficient of 200 cm²/V·s.

   Hint

   Pay close attention to the relationship between threshold and applied voltages.

6. 6.

   Explain how varying the channel dimensions affects the current in a p-channel MOSFET. Provide practical examples.

   Hint

   Remember that current increases with conductivity, which improves with dimension tuning.