Practice Finding Common Mode Gain (75.4.2) - Differential Amplifier : Basic Structure and Principle of Operation

Practice: Finding Common Mode Gain

Lesson 75.4.2Differential Amplifier : Basic Structure and Principle of Operation

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does A_d represent in a differential amplifier?
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Think about what differential amplifiers are designed to amplify.
Question 2.
Why do we want A_c to be as small as possible?
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Consider what would happen if noise were amplified.
3Question 3.
What is the ideal relationship between A_d and A_c in a differential amplifier?
- A_d should be high and A_c should be low
- A_d and A_c should be equal
- A_d should be low and A_c should be high
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Recall the basic objectives of a differential amplifier.
4Question 4.
The differential mode gain (A_d) is primarily affected by what aspect of the amplifier?
- True
- False
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Think about what signals A_d serves to amplify.
Question 5.
A differential amplifier with components not matched leads to unexpected behavior at the output. Propose a solution to ensure performance remains robust despite variations.
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Consider methods for stabilizing output against component mismatch.
Question 6.
An engineer needs to design a differential amplifier achieving A_d of 2000 while keeping A_c under 5. What design considerations may help achieve these goals?
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Think about component characteristics and their effects on gain.

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