Practice Calculations (9) - DIFFERENTIAL AMPLIFIER AND BASIC OP-AMP GAIN STAGES
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CALCULATIONS

Practice - CALCULATIONS

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Practice Questions

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Question 1 Easy

Define differential gain.

💡 Hint: Think about what happens with different inputs.

Question 2 Easy

What is the formula for CMRR?

💡 Hint: Consider the relationship between different and common-mode gains.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the formula for Differential Gain (A_d)?

A_d = g_m * R_C
A_d = -g_m * R_C/2
A_d = -R_C/R_E

💡 Hint: Pay attention to the terms involving the gain.

Question 2

True or False: A high common-mode gain is desired in amplifiers.

True
False

💡 Hint: Think about the implications of noise.

2 more questions available

Challenge Problems

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Challenge 1 Hard

An operational amplifier has a gain of 100. What is its bandwidth if its GBW is 1 MHz?

💡 Hint: Apply the GBW formula appropriately.

Challenge 2 Hard

Consider a circuit with R_C at 10 kΩ and I_CQ at 1 mA. Calculate the differential gain and comment on how changing I_CQ affects A_d.

💡 Hint: Use the differential gain formula and consider changes in parameters.

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