27.2.2 - Parameters of Voltage Amplifier
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Practice Questions
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What is the expression for the voltage gain in a common emitter amplifier?
💡 Hint: Look for the formula relating gain to the resistors.
Define input resistance in the context of amplifiers.
💡 Hint: Remember how the amplifier behaves towards the incoming signal.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What happens to voltage gain if emitter resistance is increased?
💡 Hint: Remember the feedback effect introduced by RE.
True or False: The output resistance of a common emitter amplifier is always equal to RC.
💡 Hint: Consider what else influences Ro.
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Challenge Problems
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You're designing a common emitter amplifier. If you decide on a gain of -15, how would you choose RE relative to RC, and what are the implications?
💡 Hint: Use the voltage gain formula and consider all resistances involved.
If you have a specific β value and need a target input resistance of 1kΩ, how would you determine the correct RE?
💡 Hint: Rearrange the input resistance formula effectively.
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