88.2.4 - Output Resistance and Voltage Gain
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Practice Questions
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What is a common emitter amplifier?
💡 Hint: Think of how transistors amplify signals.
What is a current mirror used for?
💡 Hint: Consider why matching current is useful in circuits.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary function of a current mirror?
💡 Hint: Think about how mirrors work in everyday life.
The output resistance of an amplifier affects which of the following?
💡 Hint: Consider what happens if you put a heavier load on a spring.
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Challenge Problems
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Given a common emitter amplifier with a transistor beta of 150 and Early voltage of 120 V, calculate the expected output voltage considering a baseline of 11.4V.
💡 Hint: Factor in current mirroring and compare with ideal voltage to find discrepancies.
Design a scenario where mismatched beta values of 100 and 200 affect the output voltage of a current mirror setup, and analyze the outcomes.
💡 Hint: To visualize, sketch the current path and observably contrast both outputs to identify variations.
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