Practice Upper And Lower Cutoff Frequencies (4.2.2) - High-Frequency Amplifier Analysis and Power Amplifiers
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Upper and Lower Cutoff Frequencies

Practice - Upper and Lower Cutoff Frequencies

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is the lower cutoff frequency (fL)?

💡 Hint: Think about how coupling capacitors affect low frequency.

Question 2 Easy

What primarily determines the upper cutoff frequency (fH)?

💡 Hint: Consider what parts of a transistor might provide low-impedance paths.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is fL defined as?

The maximum frequency of the amplifier
The frequency where gain drops to 0.707 of its mid-band value.
The average voltage output

💡 Hint: Think about where the gain reduction occurs.

Question 2

True or False: The upper cutoff frequency, fH, is primarily determined by external components.

True
False

💡 Hint: Focus on internal versus external factors.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design an amplifier circuit with a desired lower cutoff frequency of 100 Hz. If you choose a coupling capacitor of 10 μF, what will be the required Thévenin resistance?

💡 Hint: Rearrange the formula for R.

Challenge 2 Hard

An amplifier has a fH of 1 MHz. If the internal capacitance is 10 pF, what is the maximum resistance at the input?

💡 Hint: Use the same rearranging method!

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Reference links

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