Practice Practical Cases with Finite Resistance - 92.1.5 | 92. Feedback system (Part-C) | Analog Electronic Circuits - Vol 4
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Practical Cases with Finite Resistance

92.1.5 - Practical Cases with Finite Resistance

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Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Define input resistance in a feedback amplifier.

💡 Hint: Think about where the signal first enters the amplifier.

Question 2 Easy

What does the feedback ratio (β) represent?

💡 Hint: Consider how much of the signal is reused.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the formula for calculating modified input resistance in a feedback amplifier?

R = R(1 - βA)
R = R(1 + βA)
R = R - R_0

💡 Hint: Remember the role of feedback in amplifying resistances.

Question 2

True or False: Feedback increases stability in amplifier circuits.

True
False

💡 Hint: Think about the effects of feedback on circuit behavior.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

You have a voltage amplifier with R = 1000Ω and β = 0.1, A = 10. Calculate the input resistance with feedback.

💡 Hint: Break down the formula step by step.

Challenge 2 Hard

Explain how a finite feedback resistance affects the desensitization factor in a feedback loop.

💡 Hint: Relate this back to the essential role of feedback in amplifiers.

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Reference links

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