68.1.11 - Input Capacitance and Cutoff Frequency
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Practice Questions
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Define input capacitance.
💡 Hint: Think about what all components could contribute to this capacitance.
What is cutoff frequency?
💡 Hint: How does gain relate to this frequency?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does input capacitance determine in an amplifier?
💡 Hint: Think about how capacitance impacts signal behavior.
True or False: Lowering the input capacitance increases the cutoff frequency.
💡 Hint: Related to how frequency and capacitance interact.
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Challenge Problems
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Given a circuit with a load capacitance of 150 pF, an output resistance of 30 kΩ, calculate the new cutoff frequency of the circuit.
💡 Hint: Use the formula for cutoff frequency and plug in the given values.
An amplifier exhibits a voltage gain of 2500 and has an input capacitance of 12 nF. Calculate the effective input capacitance when this gain is applied and find the impact on frequency response.
💡 Hint: Use the capacitance formula that includes voltage gain.
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