80.8.1 - Threshold Voltage Impact
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Practice Questions
Test your understanding with targeted questions
What is the minimum voltage needed to turn on Q1 and Q2 in a differential amplifier?
💡 Hint: Refer to the principles of V_BE.
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.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the threshold voltage for a BJT to turn on?
💡 Hint: Think about the base-emitter junction characteristics.
True or False: Common mode voltage should ideally be equal to the threshold voltage for optimal operation.
💡 Hint: Consider the operational range of differential amplifiers.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
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.
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