Practice Conclusion (98.5) - Applications of feedback in amplifier circuits (Part-B)

Practice: Conclusion

Lesson 98.5Applications of feedback in amplifier circuits (Part-B)

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9 questions

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6 sample questions

Question 1.
What is the primary purpose of feedback in amplifier circuits?
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Think about what happens when feedback is applied.
Question 2.
Define trans-impedance.
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It relates output effects based on input actions.
3Question 3.
What is the main effect of negative feedback in amplifier design?
- Increases distortion
- Improves stability
- Reduces gain
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Consider how feedback mechanisms directly influence performance.
4Question 4.
True or False: The trans-impedance remains constant despite changes in circuit parameters once feedback is applied.
- True
- False
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Reflect on how feedback interacts with circuit parameters.
Question 5.
Given an amplifier with a trans-impedance of 250 kΩ, and β of 3, calculate the new trans-impedance when feedback is applied.
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Use the trans-impedance formula involving feedback.
Question 6.
Discuss how changing the value of feedback resistor affects the performance of a common emitter amplifier.
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Consider the balance between gain and stability.

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