92.1.7 - Current Amplifier and its Input Resistance
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Practice Questions
Test your understanding with targeted questions
What happens to input resistance in a feedback system?
💡 Hint: Consider the formula for input resistance in relation to feedback.
Define a transconductance amplifier.
💡 Hint: Look for the relationship between voltage and current in amplifiers.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the desensitization factor?
💡 Hint: Think about its impact on input characteristics.
True or False? The feedback configuration can decrease input resistance.
💡 Hint: Reflect on how feedback influences amplifier performance.
1 more question available
Challenge Problems
Push your limits with advanced challenges
An amplifier has an initial input resistance of 150 ohms and a feedback factor β of 0.15 with a gain of 40. Calculate how feedback changes the input resistance.
💡 Hint: Apply the feedback formula correctly and remember unit conversions.
Describe what happens to output resistance in practical scenarios with non-ideal feedback conditions.
💡 Hint: Remember the characteristics of output resistances and how they affect the power transfer.
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