Practice Theory And Fundamentals (4) - DIFFERENTIAL AMPLIFIER AND BASIC OP-AMP GAIN STAGES
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THEORY AND FUNDAMENTALS

Practice - THEORY AND FUNDAMENTALS

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is a differential amplifier?

💡 Hint: Think about its main function.

Question 2 Easy

State the formula for A_d.

💡 Hint: What do we measure the output relative to?

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does CMRR indicate about a differential amplifier's performance?

Ability to amplify signals
Ability to reject noise
Ability to increase bandwidth

💡 Hint: Consider what you want to avoid in signal processing.

Question 2

True or False: An ideal common-mode gain for a differential amplifier should be zero.

True
False

💡 Hint: Relate this to its fundamental function.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

A BJT differential amplifier is set up with a collector resistor (R_C) of 10kΩ and operates at a quiescent current of 0.5mA. Calculate the differential gain and discuss its implications for signal processing.

💡 Hint: Use the provided formulas and remember that the negative sign indicates phase shift.

Challenge 2 Hard

If a differential amplifier outputs 2V from a differential input of 5mV when calculated, but you measure only 1V, calculate the common-mode gain and discuss potential error sources.

💡 Hint: Reflect on your experimental setup and components’ characteristics.

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Reference links

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