Practice Inverting Amplifier (5.1) - Operational Amplifier and Its Applications

Practice: Inverting Amplifier

Lesson 5.1Operational Amplifier and Its Applications

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9 questions

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6 sample questions

Question 1.
What is the role of the feedback resistor in an inverting amplifier?
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Think about how the output affects the input signal.
Question 2.
What is the phase relationship between input and output in an inverting amplifier?
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Consider how the word 'inverting' describes the output.
3Question 3.
What is the formula for the gain of an inverting amplifier?
- A_v = R_f/R_{in}
- A_v = -R_f/R_{in}
- A_v = R_{in}/R_f
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Remember the negative sign indicates inversion.
4Question 4.
True or False: The output of an inverting amplifier is in the same phase as the input.
- True
- False
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Think about the name 'inverting amplifier'.
Question 5.
An engineer designs an inverting amplifier with a feedback resistor of 200kΩ and input resistor of 50kΩ. If the input voltage is 2V, what is the output voltage?
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Calculate gain first then use it to find the output.
Question 6.
If you want to design an inverting amplifier to invert a 5V input signal and output should be 15V, what gain would you need, and what should be the resistor values if R_{in} is 10kΩ?
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First derive the gain then use it to find R_f.

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