MOSFET Field Effect Transistor (FET)

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What does MOSFET stand for?

Metal-Oxide Semiconductor-FET

What distinguishes a unipolar transistor from other transistors?

Only one kind of charge carriers is involved in the current flow.

What are the components of the MOSFET structure?

Gate, Drain, Source, Bulk

What are the two types of FETs mentioned in the text?

PMOS and NMOS Signup and view all the answers

In an NMOS, when is the drain voltage higher than the source voltage?

Drain is always higher than source Signup and view all the answers

What does the gate voltage UGS control?

The current ID Signup and view all the answers

What is the consequence of having IG = 0?

ID = IS Signup and view all the answers

In what region does the transistor not conduct?

Sub-Threshold Region Signup and view all the answers

What happens when UGS > UT?

An n-conducting channel is formed below the oxide (inversion layer) and ID > 0. Signup and view all the answers

What is the consequence of having UDS >> 0?

It creates a triangular narrowing in the channel potential from source to drain until saturation. Signup and view all the answers

What region of operation is characterized by UGS = 0 and UDS > 0?

Sub-Threshold Region Signup and view all the answers

What is the equation for the drain current in the linear region when UDS >> 0?

ID = β * ((UGS - UT) - UDS/2) * UDS Signup and view all the answers

What is the consequence of having UBD < 0 in the Bulk-Drain-Diode?

Reverse Bias Signup and view all the answers

What happens when UGS > UT and UDS ≈ 0?

An n-conducting channel is formed below the oxide (inversion layer) and ID > 0 Signup and view all the answers

How does UDS > 0 affect the channel potential in the linear region?

Creates a triangular narrowing as the channel potential increases from source to drain Signup and view all the answers

What is the most important type of FET mentioned in the text?

MOSFET = Metal-Oxide Semiconductor-FET Signup and view all the answers

What are the three electrodes in the schematic structure of an n-channel enhancement type MOSFET?

Gate, Drain, Source Signup and view all the answers

What distinguishes a MOSFET from BJTs?

MOSFETs are symmetrical devices, allowing the Drain and Source to be switched. Signup and view all the answers

What are the two types of unipolar transistors mentioned in the text?

PMOS (p-channel-type) and NMOS (n-channel-type) Signup and view all the answers

When does the Drain voltage exceed the Source voltage in an NMOS?

The Drain voltage is always higher than the Source voltage in an NMOS. Signup and view all the answers