19.1.5 - Current Gain Variation
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Practice Questions
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What is transconductance?
💡 Hint: Think about the current flow changes in relation to the input voltage.
Define the output conductance.
💡 Hint: Consider how current responds to voltage changes.
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Interactive Quizzes
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What does transconductance measure?
💡 Hint: Look for the relationship between collector current and the input voltage.
True or False: Output conductance affects linearity.
💡 Hint: Think about how circuit performance is influenced by these parameters.
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Challenge Problems
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Given the small signal model parameters of a BJT with g_m = 3 mS and r_pi = 2 kΩ, calculate the output voltage gain if the load resistance is 1 kΩ.
💡 Hint: Remember to calculate the parallel resistance first.
A BJT amplifier exhibits a transconductance of 5 mS at an operating point of 10V and 20 µA. How does altering the operating point to 15V affect the transconductance if all other factors remain constant?
💡 Hint: Consult the I-V characteristics of the BJT to evaluate changes.
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