Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET)
Output and transfer characteristics, threshold voltage, body effect (MOSFET)
Parameters
1. What does the abbreviation "MOSFET" stand for in full?
A. Metal-Oxide-Semiconductor Field-Effect Transistor
B. Multi-Output Signal Frequency Electronic Tool
C. Metal-Organic Semiconductor Field Emission Transistor
D. Mobile Oscillating Silicon Effect Transistor
2. What is the difference between the triode (linear) and saturation regions?
A. In triode, $V_{ds}
B. Triode only applies to p-type devices
C. Saturation only occurs at zero temperature
D. There is no difference, these are synonyms
3. What is called the "body effect"?
A. The increase in threshold voltage when the body-source voltage ($V_{sb}$) becomes nonzero — due to the widening of the depletion region
B. The transistor's physical size
C. A heating effect
D. Mechanical vibration
4. Why is knowing the transconductance ($g_m$) important when designing an amplifier?
A. $g_m=dI_d/dV_{gs}$ directly sets how strongly the transistor converts an input voltage change into an output current change — this is the fundamental gain parameter
B. It only determines the transistor's color
C. It has no connection to amplification
D. It is only relevant for power devices