19.1.1 - Small Signal Equivalent Circuit
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Practice Questions
Test your understanding with targeted questions
What does the small signal equivalent circuit aim to achieve?
💡 Hint: Consider the linearization of circuit behavior.
Define transconductance in your own words.
💡 Hint: Think about current versus voltage relationships.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does transconductance measure?
💡 Hint: Focus on the relationship between current and voltage.
Is the output conductance of a BJT a measure of how collector current changes with collector-emitter voltage?
💡 Hint: Think about how voltage affects current.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Consider a BJT amplifier with a transconductance of 1.5mS and a base-emitter resistance of 200Ω. If the input signal is a sinusoidal voltage of 20mV, calculate the output voltage swing when coupled with a load resistance of 1kΩ.
💡 Hint: Use the formula for finding output voltage in small signal analysis.
Given a BJT operates with a small signal current gain of 150 at a certain operating point. If the base current is 10μA, what will be the collector current? How will this value change if the operating point shifts causing β to drop to 120?
💡 Hint: Recall the relationship between Ic and Ib through β.
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