Practice Small Signal Model Of Mosfet (5.4) - MOSFET Amplifiers - Electronic Devices 1

Practice: Small Signal Model of MOSFET

Lesson 5.4MOSFET Amplifiers

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10 questions

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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does the small signal model represent?
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Think about linear approximations.
Question 2.
Define transconductance in relation to MOSFETs.
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Consider its role in proportional changes.
3Question 3.
What is the small signal model of a MOSFET represented as?
- A current-controlled voltage source
- A voltage-controlled current source
- A resistor
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Think about how the MOSFET operates.
4Question 4.
Transconductance (gm) refers to the ratio of which quantities?
- Output voltage to input voltage
- Change in output current to change in input voltage
- Input voltage to output current
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Consider the formula for gm.
Question 5.
A MOSFET has a threshold voltage (Vth) of 0.7 V, and operates with ID of 10 mA at VGS = 3 V. Calculate its transconductance and its output current for a small signal VGS = 0.01 V.
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Use the transconductance formula and plug in the values carefully.
Question 6.
Explain how the small signal model assists in determining the bandwidth of a MOSFET amplifier, given you're varying Vgs to analyze performance.
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Focus on gain response in relation to frequency adjustments.

6 more questions in this section. Enroll free to practise them all.