68.1.9 - Small Signal Gain and Resistance
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Practice Questions
Test your understanding with targeted questions
Define transconductance and provide its formula.
💡 Hint: Think about how output current responds to variations in input voltage.
What is the role of early voltage in a transistor?
💡 Hint: Consider how transistors behave at different collector voltages.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula for transconductance?
💡 Hint: Refer to how input voltage influences output current.
True or False: A higher output resistance in an amplifier typically increases the gain.
💡 Hint: Think about the formula where gain is the product of transconductance and output resistance.
2 more questions available
Challenge Problems
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Given a circuit with transistor Q1 having a transconductance of 15 mS and an output resistance of 20 kΩ, calculate the voltage gain. Then analyze how this would change if the load capacitance increased.
💡 Hint: Draw the small-signal model to visualize changes in the circuit.
Consider an amplifier where the early voltage is given as 100V, and the collector current is set to 2 mA. Calculate the increased output resistance and its effects on amplification when adjusting the collector-emitter voltage.
💡 Hint: Relate increased resistance to the operational limits of gain.
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