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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the minimum voltage needed to turn on Q1 and Q2 in a differential amplifier?
💡 Hint: Refer to the principles of V_BE.
Question 2
Easy
What happens to the output if the collector voltage approaches the supply voltage?
💡 Hint: Think about the relationship between supply voltage and output signal levels.
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 threshold voltage for a BJT to turn on?
- 0.2 V
- 0.6 V
- 0.8 V
💡 Hint: Think about the base-emitter junction characteristics.
Question 2
True or False: Common mode voltage should ideally be equal to the threshold voltage for optimal operation.
- True
- False
💡 Hint: Consider the operational range of differential amplifiers.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given a differential amplifier using BJTs with a common mode voltage of 3 V and a threshold voltage of 0.6 V, determine whether the transistors are operating in the saturation region. Explain your reasoning.
💡 Hint: Draw out the voltage levels to visualize their interactions.
Question 2
Calculate the differential voltage gain for a differential amplifier with a differential mode gain of 50 and a common mode gain of -5. How does this affect the output signal?
💡 Hint: Remember to factor in the effects of common mode gain on ideal signal outputs.
Challenge and get performance evaluation