15.2.4 - Concept of Transconductance
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Practice Questions
Test your understanding with targeted questions
What is transconductance?
💡 Hint: Think about how input voltage changes affect current output.
Why is the Q-point important in amplifier design?
💡 Hint: Consider how operating points relate to output signal quality.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does transconductance (g_m) measure?
💡 Hint: Focus on what happens to current when voltage varies.
True or False: The Q-point should always be set at the highest part of the output characteristic curve for maximum amplification.
💡 Hint: Consider the implications of different operating points.
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Challenge Problems
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If a common emitter amplifier has a transconductance of 40 mA/V, and the base voltage increases by 0.05 V, what will be the change in collector current?
💡 Hint: Use the transconductance formula.
A BJT amplifier enters saturation when the collector current exceeds 10 mA. If the collector current is initially 8 mA, what range of increase in input voltage would keep it within linear operation?
💡 Hint: Consider g_m for your calculations and ensure the collector current remains less than 10 mA.
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