Practice Department Of Electronics And Electrical Communication Engineering (33.3)

Practice: Department of Electronics and Electrical Communication Engineering

Lesson 33.3Common Source Amplifier (Part B)

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7 questions

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6 sample questions

Question 1.
What is the expression for voltage gain in a common source amplifier?
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Consider both output resistor and transconductance.
Question 2.
Define transconductance.
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It's often symbolized as g_m.
3Question 3.
What is the formula for voltage gain in a common source amplifier?
- A = R_D * g_m
- A = -R_D * g_m
- A = g_m / R_D
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Remember the relationship between voltage gain and the output resistor.
4Question 4.
True or False: The input resistance of a common source amplifier is high due to zero gate current.
- True
- False
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Think about what happens at the input port.
Question 5.
Given a common source MOSFET amplifier with a transconductance g_m = 2 mA/V, find the output voltage for an input AC swing of 0.5V, given that R_D = 3 kΩ. Calculate the voltage gain and the expected output swing.
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Use the gain formula learned earlier.
Question 6.
Discuss how you would design a common source amplifier to optimize its voltage gain in an integrated circuit environment as compared to discrete circuit designs.
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Think about the trade-offs in real estate versus performance.

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