99.4.2 - Upper and Lower Limits of R
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is the role of feedback in amplifiers?
💡 Hint: Think about how signals are processed.
Define loop gain in the context of feedback systems.
💡 Hint: What happens to gain in a round-trip loop?
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the main purpose of feedback in an amplifier?
💡 Hint: Consider why stability might be crucial in circuit design.
True or False: A higher loop gain is always better.
💡 Hint: What can occur if the loop gain is too high?
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
You are designing a feedback amplifier with specified conditions for input resistance and loop gain. Given parameters like beta and collector current, calculate the maximum and minimum values for R and justify your choice.
💡 Hint: Start with examining both the upper and lower limits of the resistor.
A two-stage amplifier uses feedback, and each stage has different beta values. Calculate the cumulative feedback factor and consequently the effective resistance needed for optimal performance.
💡 Hint: Consider how feedback from each stage influences the overall performance.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.