EEE 334 chapter 5 MOS Large Signal Operation Exam Questions and Answers Already Passed
Latest Update 2025-2026
What does MOSFET stand for? - Answers Metal Oxide Semiconductor Field Effect Transistor
What are the three terminals of a MOSFET? - Answers A: Gate (G), Drain (D), Source (S)
How does an NMOS transistor turn ON? - Answers A: A positive gate voltage creates an electron
channel, connecting the drain to the source.
Q: What are the two main types of MOSFETs? - Answers A: NMOS (normally OFF, turns ON with
positive VGV_GVG) and PMOS (normally ON, turns OFF with positive
Q: What is the function of the oxide layer in a MOSFET? - Answers A: It insulates the gate from
the substrate, allowing voltage control without direct conduction.
Q: What happens when no voltage is applied to the gate of an NMOS MOSFET? - Answers A: The
MOSFET remains OFF because no conduction channel is formed.
Q: What determines the amount of current a MOSFET can carry? - Answers A: The width-to-
length ratio (W/LW/LW/L) of the channel.
Q: What are the three configurations for MOSFET amplifiers? - Answers A: Common source,
common gate, common drain.
Q: What is Moore's Law in relation to MOSFETs? - Answers A: It predicts the doubling of
transistors on a chip approximately every two years.
Q: Why are MOSFETs preferred over BJTs in digital circuits? - Answers A: They consume less
power and are easier to integrate into large-scale circuits (CMOS technology).
Q: What is the purpose of a parasitic diode in a MOSFET? - Answers A: It forms due to the pn-
junctions but is kept reverse-biased to prevent unwanted conduction.
Q: What material is commonly used for the MOSFET gate instead of metal? - Answers A:
Polysilicon (highly doped silicon).
Q: What is the primary advantage of CMOS technology? - Answers A: It enables low-power
operation by using complementary NMOS and PMOS transistors.
Q: What is the threshold voltage (VthV_{th}Vth) of a MOSFET? - Answers A: The minimum gate
voltage required to create a conducting channel.
Q: What does transconductance (gmg_mgm) represent in a MOSFET? - Answers A: It measures
how effectively the gate voltage controls the drain current.
Q: Why does reducing gate length increase transistor speed? - Answers A: Shorter channels
Latest Update 2025-2026
What does MOSFET stand for? - Answers Metal Oxide Semiconductor Field Effect Transistor
What are the three terminals of a MOSFET? - Answers A: Gate (G), Drain (D), Source (S)
How does an NMOS transistor turn ON? - Answers A: A positive gate voltage creates an electron
channel, connecting the drain to the source.
Q: What are the two main types of MOSFETs? - Answers A: NMOS (normally OFF, turns ON with
positive VGV_GVG) and PMOS (normally ON, turns OFF with positive
Q: What is the function of the oxide layer in a MOSFET? - Answers A: It insulates the gate from
the substrate, allowing voltage control without direct conduction.
Q: What happens when no voltage is applied to the gate of an NMOS MOSFET? - Answers A: The
MOSFET remains OFF because no conduction channel is formed.
Q: What determines the amount of current a MOSFET can carry? - Answers A: The width-to-
length ratio (W/LW/LW/L) of the channel.
Q: What are the three configurations for MOSFET amplifiers? - Answers A: Common source,
common gate, common drain.
Q: What is Moore's Law in relation to MOSFETs? - Answers A: It predicts the doubling of
transistors on a chip approximately every two years.
Q: Why are MOSFETs preferred over BJTs in digital circuits? - Answers A: They consume less
power and are easier to integrate into large-scale circuits (CMOS technology).
Q: What is the purpose of a parasitic diode in a MOSFET? - Answers A: It forms due to the pn-
junctions but is kept reverse-biased to prevent unwanted conduction.
Q: What material is commonly used for the MOSFET gate instead of metal? - Answers A:
Polysilicon (highly doped silicon).
Q: What is the primary advantage of CMOS technology? - Answers A: It enables low-power
operation by using complementary NMOS and PMOS transistors.
Q: What is the threshold voltage (VthV_{th}Vth) of a MOSFET? - Answers A: The minimum gate
voltage required to create a conducting channel.
Q: What does transconductance (gmg_mgm) represent in a MOSFET? - Answers A: It measures
how effectively the gate voltage controls the drain current.
Q: Why does reducing gate length increase transistor speed? - Answers A: Shorter channels
