EEE334 Chapter 5 Mos Large Signal Operation Questions With Complete Solutions | 2026 | Guaranteed Success

EEE334 Chapter 5 Mos Large Signal Operation Questions With Complete Solutions | 2026 | Guaranteed Success What does MOSFET stand for? - answer-Metal Oxide Semiconductor Field Effect Transistor What are the three terminals of a MOSFET? - answer-A: Gate (G), Drain (D), Source (S) How does an NMOS transistor turn ON? - answer-A: A positive gate voltage creates an electron channel, connecting the drain to the source. Q: What are the two main types of MOSFETs? - answer-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? - answer-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? - answer-A: The MOSFET remains OFF because no conduction channel is formed. Q: What determines the amount of current a MOSFET can carry? - answer-A: The width-to-length ratio (W/LW/LW/L) of the channel. Q: What are the three configurations for MOSFET amplifiers? - answer-A: Common source, common gate, common drain. Q: What is Moore's Law in relation to MOSFETs? - answer-A: It predicts the doubling of transistors on a chip approximately every two years.Q: Why are MOSFETs preferred over BJTs in digital circuits? - answer-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? - answer-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? - answer-A: Polysilicon (highly doped silicon). Q: What is the primary advantage of CMOS technology? - answer-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? - answer-A: The minimum gate voltage required to create a conducting channel. Q: What does transconductance (gmg_mgm) represent in a MOSFET? - answer-A: It measures how effectively the gate voltage controls the drain current. Q: Why does reducing gate length increase transistor speed? - answer-A: Shorter channels reduce electron travel time, increasing switching speed. Q: What is the typical resistance of an OFF-state MOSFET? - answer-A: Around 10^{12} , making it an excellent switch. Q: What causes channel formation in an NMOS MOSFET? - answer-A: A positive gate voltage repels holes, attracting electrons to form a conducting path. Q: What happens if a MOSFET's source-drain voltage exceeds a certain limit? - answer-A: It may enter saturation, where current becomes nearly constant.