29.4 - CE Amplifier with Cell Biased Circuit
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Practice Questions
Test your understanding with targeted questions
Define input resistance in a common emitter amplifier.
💡 Hint: Refer to the parallel combination of resistances.
Calculate the voltage gain if gm is 150 mA/V and RC is 2 kΩ.
💡 Hint: Use the formula A<sub>v</sub> = -g<sub>m</sub> × R<sub>C</sub>.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the significance of a negative voltage gain in a CE amplifier?
💡 Hint: Think about the nature of CE amplifiers.
Input resistance is critical because it affects signal coupling into the amplifier.
💡 Hint: Consider how resistances work in parallel.
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Challenge Problems
Push your limits with advanced challenges
Given that RC is 5 kΩ and gm is 200 mA/V, calculate the voltage gain and explain how it would change if RC is halved.
💡 Hint: Use the voltage gain formula to find changes with the modified resistors.
A common emitter amplifier experiences power dissipation at 12 V with a collector current of 3 mA. Calculate the power loss and discuss the implications for circuit design.
💡 Hint: Review how voltage and current interact to produce power.
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