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  • Question

  • The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals:


  • Options
  • A. the ratio of the input resistance to the feedback resistance
  • B. the open-loop voltage gain Aol
  • C. the feedback resistance divided by the input resistance
  • D. the input resistance

  • Correct Answer
  • the feedback resistance divided by the input resistance 

    • Operational Amplifiers problems

    Search Results

    • 1. An output that is proportional to the addition of two or more inputs is from which type of amplifier?

    • Options
    • A. differentiator
    • B. difference
    • C. summing
    • D. analog subtractor
      • Discuss
    • 2. When a capacitor is used in place of a resistor in an op-amp network, its placement determines:

    • Options
    • A. open- or closed-loop gain
    • B. integration or differentiation
    • C. saturation or cutoff
    • D. addition or subtraction
      • Discuss
    • 3. If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?

    • Options
    • A. 6240 ohms
    • B. 2.4 kilohms
    • C. 410 ohms
    • D. 0.62 kilohms
      • Discuss
    • 4. What is the frequency of this 555 astable multivibrator?


    • Options
    • A. 278 Hz
    • B. 178 Hz
    • C. 78 Hz
    • D. 8 Hz
      • Discuss
    • 5. What is this circuit?


    • Options
    • A. a low-pass filter
    • B. a high-pass filter
    • C. a bandpass filter
    • D. a band-stop filter
      • Discuss
    • 6. What is the output waveform?


    • Options
    • A. sine wave
    • B. square wave
    • C. +15 V
    • D. ?15 V
      • Discuss
    • 7. What starts a free-running multivibrator?

    • Options
    • A. a trigger
    • B. an input signal
    • C. an external circuit
    • D. nothing
      • Discuss
    • 8. The closed-loop voltage gain of an inverting amplifier equals:

    • Options
    • A. the ratio of the input resistance to the feedback resistance
    • B. the open-loop voltage gain
    • C. the feedback resistance divided by the input resistance
    • D. the input resistance
      • Discuss
    • 9. With a differential gain of 50,000 and a common-mode gain of 2, what is the common-mode rejection ratio?

    • Options
    • A. ?87.9 dB
    • B. ?43.9 dB
    • C. 43.9 dB
    • D. 87.9 dB
      • Discuss
    • 10. What is the cutoff frequency of this low-pass filter?


    • Options
    • A. 4.8 kHz
    • B. 3.8 kHz
    • C. 2.8 kHz
    • D. 1.8 kHz
      • Discuss

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