Malvino: MCQ in Nonlinear Op Amp Circuits

This is the Multiple Choice Questions in Chapter 22: Nonlinear Op-Amp Circuits from the book Electronic Principles 7th Edition by Albert Malvino. If you are looking for a reviewer in Electronics Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.

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Topic Outline

MCQs in Comparators with Zero Reference
MCQs in Comparators with Nonzero Reference
MCQs in Comparators with Hysteresis
MCQs in Window Comparator
MCQs in the Integrator
MCQs in Waveform Conversion
MCQs in Waveform Generation
MCQs in Active Diode Circuits
MCQs in the Differentiator
MCQs in Class D Amplifier

Start Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. In a nonlinear op-amp circuit, the

a. Op amp never saturates
b. Feedback loop is never opened
c. Output shape is the same as the input shape
d. Op amp may saturate

2. To detect when the input is greater than a particular value, use a

a. Comparator
b. Clamper
c. Limiter
d. Relaxation oscillator

3. The voltage out of a Schmitt trigger is

a. A low voltage
b. A high voltage
c. Either a low or a high voltage
d. A sine wave

4. Hysteresis prevents false triggering associated with

a. A sinusoidal input
b. Noise voltages
c. Stray capacitances
d. Trip points

5. If the input is a rectangular pulse, the output of an integrator is a

a. Sine wave
b. Square wave
c. Ramp
d. Rectangular pulse

6. When a large sine wave drives a Schmitt trigger, the output is

a. Rectangular wave
b. Triangular wave
c. Rectified sine wave
d. Series of ramps

7.If pulse width decreases and the period stays the same, the duty cycle

a. Decreases
b. Stays the same
c. Increases
d. Is zero

8. The output of a relaxation oscillator is a

a. Sine wave
b. Square wave
c. Ramp
d. Spike

9. If AOL = 200,000, the closed-loop knee voltage of a silicon diode is

a. 1 uV
b. 3.5 uV
c. 7 uV
d. 14 uV

10. The input to a peak detector is a triangular wave with a peak-to-peak value of 8 V and an average value of 0. The output is

a. 0
b. 4 V
c. 8 V
d. 16 V

11. The input voltage to a positive limiter is a triangular wave of 8 Vpp and an average value of 0. If the reference level is 2 V, the output is

a. 0
b. 2 Vpp
c. 6 Vpp
d. 8 Vpp

12. The discharging time constant of a peak detector is 10 ms. The lowest frequency you should use is

a.10 Hz
b.100 Hz
c. 1 kHz
d. 10 kHz

13. A comparator with a trip point of zero is sometimes called a

a. Threshold detector
b. Zero-crossing detector
c. Positive limit detector
d. Half-wave detector

14. To work properly, many IC comparators need an external

a. Compensating capacitor
b. Pullup resistor
c. Bypass circuit
d. Output stage

15. A Schmitt trigger uses

a. Positive feedback
b. Negative feedback
c. Compensating capacitors
d. Pullup resistors

16. A Schmitt trigger

a. Is a zero-crossing detector
b. Has two trip points
c. Produces triangular output waves
d. Is designed to trigger on noise voltage

17. A relaxation oscillator depends on the charging of a capacitor through a

a. Resistor
b. Inductor
c. Capacitor
d. Noninverting input

18. A ramp of voltage

a. Always increases
b. Is a rectangular pulse
c. Increases or decreases at a linear rate
d. Is produced by hysteresis

19. The op-amp integrator uses

a. Inductors
b. The Miller effect
c. Sinusoidal inputs
d. Hysteresis

20. The trip point of a comparator is the input voltage that causes

a. The circuit to oscillate
b. Peak detection of the input signal
c. The output to switch states
d. Clamping to occur

21. In an op-amp integrator, the current through the input resistor flows into the

a. Inverting input
b. Noninverting input
c. Bypass capacitor
d. Feedback capacitor

22. An active half-wave rectifier has a knee voltage of

a. VK
b. 0.7 V
c. More than 0.7 V
d. Much less than 0.7 V

23. In an active peak detector, the discharging time constant is

a. Much longer than the period
b. Much shorter than the period
c. Equal to the period
d. The same as the charging time constant

24. If the reference voltage is zero, the output of an active positive limiter is

a. Positive
b. Negative
c. Either positive or negative
d. A ramp

25. The output of an active positive clamper is

a. Positive
b. Negative
c. Either positive or negative
d. A ramp

26. The positive clamper adds

a. A positive dc voltage to the input
b. A negative dc voltage to the input
c. An ac signal to the output
d. A trip point to the input

27. A window comparator

a. Has only one usable threshold
b. Uses hysteresis to speed up response
c. Clamps the input positively
d. Detects an input voltage between two limits

Check your work.

Answers key on MCQ in Nonlinear Op-Amp Circuits

Complete List of MCQ in Electronic Principles by Albert Malvino

Multiple Choice Questions in Electronic Principles

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