Practice Common Mode Gain And Differential Mode Gain (75.3.2) - Differential Amplifier : Basic Structure and Principle of Operation

Practice: Common Mode Gain and Differential Mode Gain

Lesson 75.3.2Differential Amplifier : Basic Structure and Principle of Operation

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9 questions

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6 sample questions

Question 1.
What is the definition of differential mode gain?
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It relates to the input signals' opposition.
Question 2.
What should the ideal common mode gain be?
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Think about noise rejection.
3Question 3.
What is the main function of a differential amplifier?
- To amplify both input signals equally
- To amplify the difference between two input signals
- To amplify noise
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Focus on the word 'difference'.
4Question 4.
True or False: Common mode gain should be maximized for better performance.
- True
- False
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Remember desired amplifier properties.
Question 5.
Design a differential amplifier circuit using BJTs and calculate its expected differential and common mode gain based on specific resistor and input values.
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Focus on input-output relationships.
Question 6.
Given a common mode gain of 1.5 and a differential mode gain of 25, what is the common mode rejection ratio (CMRR)?
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Look for the ratio of gains.

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