MOSFETs Quiz

What does MOSFET stand for?

• Metal Oxide Semiconductor Field Effect Transistor

• Metallic Oxide Semiconductor Transistor

• Metallic Oxide Semiconductor Field Effect Transistor

• Metal Oxide Semiconductor Transistor

What is the purpose of varying the voltage on the gate of a MOSFET?

• To change the resistance between the substrate and source

• To change the resistance between the gate and drain

• To change the resistance between the gate and source

• To change the resistance between the source and drain

What is the natural state of the MOSFET when the gate voltage is 0?

• Saturation region

• Triode region

• Pinch-off region

• Cutoff region

What happens when the gate voltage repels holes in the substrate away from the area between the source and drain?

• A depletion region is created across the entire channel

• The MOSFET enters the triode region

• An inversion layer of electrons starts to form at the source

• The MOSFET enters the saturation region

What is the operating region called when the gate threshold is not yet equal to the threshold voltage?

• Triode region

• Cutoff region

• Saturation region

• Pinch-off region

What happens when the gate voltage finally passes the threshold voltage?

• The gate voltage repels holes in the substrate

• The depletion region expands toward the drain

• The MOSFET enters the cutoff region

• An inversion layer of electrons forms and connects the source and drain regions

What is the purpose of the channel length (L) in a MOSFET?

• To determine the distance between the gate and drain

• To determine the distance between the gate and source

• To determine the distance between the source and drain

• To determine the distance between the substrate and the source

What is the purpose of the channel width (W) in a MOSFET?

• To determine the distance between the gate and drain

• To determine the distance between the substrate and the source

• To determine the distance between the source and drain

• To determine the distance between the gate and source

What is the purpose of the substrate being connected to ground in a MOSFET?

• To ensure the source and drain are at equal voltage potentials

• To prevent unwanted current due to forward biasing

• To ensure the gate voltage is 0

• To ensure the gate voltage creates a field effect

What is the purpose of a negative gate voltage in a depletion-mode MOSFET?

• To enhance the conductivity of the channel

• To turn off the MOSFET

• To create a depletion region across the entire channel

• To repel holes in the substrate