Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is input resistance (Zinf)?
💡 Hint: Think about how input voltage and current relate.
Question 2
Easy
How does negative feedback affect Zinf in series configurations?
💡 Hint: Consider the effect of opposition to the input current.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating Zinf in series feedback configurations?
- Zinf = Zin (1 + AβF)
- Zinf = Zin / (1 + AβF)
- Zinf = 1 + AβF Zin
💡 Hint: Think about how current flows with feedback.
Question 2
True or False: Shunt feedback increases the input resistance of an amplifier.
- True
- False
💡 Hint: Consider how input currents behave in shunt feedback.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Consider an amplifier with an open-loop input impedance of 1 MΩ and a feedback factor of 0.005 in a series connection. Calculate the input resistance Zinf. Explain how the result would change if shunt feedback was applied instead.
💡 Hint: Calculate first, then use the feedback topology to explain the difference.
Question 2
You have a voltage amplifier designed for a sensor with high output impedance. Define appropriate feedback topology and justify your choice based on Zinf calculations. What would happen if shunt topology is incorrectly applied?
💡 Hint: Think about how the feedback informs the interface with the sensor.
Challenge and get performance evaluation