Floyd Self-test in Basic Op-Amp Circuits

(Last Updated On: December 8, 2017)

Floyd Self-test in Chapter 13 of Electronic Devices

This is the Self-test in Chapter 13: Basic Op-Amp Circuits from the book Electronic Devices Conventional Current Version, 9th edition by Thomas L. Floyd. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Floyd Self-test Chapter 13 Topic Outline

  • Floyd Self-test in Comparators
  • Floyd Self-test in Summing Amplifiers
  • Floyd Self-test in Integrators and Differentiators

Start Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. In a zero-level detector, the output changes state when the input

  • (a) is positive
  • (b) is negative
  • (c) crosses zero
  • (d) has a zero rate of change

2. The zero-level detector is one application of a

  • (a) comparator
  • (b) differentiator
  • (c) summing amplifier
  • (d) diode

3. Noise on the input of a comparator can cause the output to

  • (a) hang up in one state
  • (b) go to zero
  • (c) change back and forth erratically between two states
  • (d) produce the amplified noise signal

4. The effects of noise can be reduced by

  • (a) lowering the supply voltage
  • (b) using positive feedback
  • (c) using negative feedback
  • (d) using hysteresis
  • (e) answers (b) and (d)

5. A comparator with hysteresis

  • (a) has one trigger point
  • (b) has two trigger points
  • (c) has a variable trigger point
  • (d) is like a magnetic circuit

6. In a comparator with hysteresis,

  • (a) a bias voltage is applied between the two inputs
  • (b) only one supply voltage is used
  • (c) a portion of the output is fed back to the inverting input
  • (d) a portion of the output is fed back to the noninverting input

7. Using output bounding in a comparator

  • (a) makes it faster
  • (b) keeps the output positive
  • (c) limits the output levels
  • (d) stabilizes the output

8. A summing amplifier can have

  • (a) only one input
  • (b) only two inputs
  • (c) any number of inputs

9. If the voltage gain for each input of a summing amplifier with a feedback resistor is unity, the input resistors must have a value of

  • (a) 4.7kΩ
  • (b) 4.7kΩ divided by the number of inputs
  • (c) 4.7kΩ times the number of inputs

10. An averaging amplifier has five inputs. The ratio Rf /R must be

  • (a) 5
  • (b) 0.2
  • (c) 1

11. In a scaling adder, the input resistors are

  • (a) all the same value
  • (b) all of different values
  • (c) each proportional to the weight of its input
  • (d) related by a factor of two

12. In an ideal integrator, the feedback element is a

  • (a) resistor
  • (b) capacitor
  • (c) zener diode
  • (d) voltage divider

13. For a step input, the output of an integrator is

  • (a) a pulse
  • (b) a triangular waveform
  • (c) a spike
  • (d) a ramp

14. The rate of change of an integrator’s output voltage in response to a step input is set by

  • (a) the RC time constant
  • (b) the amplitude of the step input
  • (c) the current through the capacitor
  • (d) all of these

15. In a differentiator, the feedback element is a

  • (a) resistor
  • (b) capacitor
  • (c) zener diode
  • (d) voltage divider

16. The output of a differentiator is proportional to

  • (a) the RC time constant
  • (b) the rate at which the input is changing
  • (c) the amplitude of the input
  • (d) answers (a) and (b)

17. When you apply a triangular waveform to the input of a differentiator, the output is

  • (a) a dc level
  • (b) an inverted triangular waveform
  • (c) a square waveform
  • (d) the first harmonic of the triangular waveform

Complete List of Floyd Self-test in Electronic Devices

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