Malvino Chapter 18

Chapter 18 

1. What usually controls the open-loop cutoff frequency of an op amp? 
a. Stray-wiring capacitance 
b. Base-emitter capacitance 
c. Collector-base capacitance 
d. Compensating capacitance 

2. A compensating capacitor prevents 
a. Voltage gain 
b. Oscillations 
c. Input offset current 
d. Power bandwidth 

3. At the unity-gain frequency, the open-loop voltage gain is 
a. 1 
b. Amid 
c. Zero 
d. Very large 


4. The cutoff frequency of anop amp equals the unity-gain frequency divided
by 
a. the cutoff frequency 
b. Closed-loop voltage gain 
c. Unity 
d. Common-mode voltage gain 

5. If the cutoff frequency is 15 Hz and the midband open-loop voltage gain is 1,000,000, the unity-gain frequency is 
a. 25 Hz 
b. 1 MHz 
c. 1.5 MHz 
d. 15 MHz 

6. If the unity-gain frequency is 5 MHz and the midband open-loop voltage gain is 200,000,the cutoff frequency is 
a. 25 Hz 
b. 1 MHz 
c. 1.5 MHz 
d. 15 MHz 

7. The initial slope of a sine wave is directly proportional to 
a. Slew rate 
b. Frequency 
c. Voltage gain 
d. Capacitance 

8. When the initial slope of a sine wave is greater than the slew rate, 
a. Distortion occurs 
b. Linear operation occurs 
c. Voltage gain is maximum 
d. The op amp works best 

9. The power bandwidth increases when 
a. Frequency decreases 
b. Peak value decreases 
c. Initial slope decreases 
d. Voltage gain increases 

10. A 741C uses 
a. Discrete resistors 
b. Inductors 
c. Active-load resistors 
d. A large coupling capacitor 

11. A 741C cannot work without 
a. Discrete resistors 
b. Passive loading 
c. Dc return paths on the two bases 
d. A small coupling capacitor 

12. The input impedance of a BIFET op amp is 
a. Low 
b. Medium 
c. High 
d. Extremely high 

13. An LF157A is a 
a. Diff amp 
b. Source follower 
c. Bipolar op amp 
d. BIFET op amp 

14. If the two supply voltagesare plus and minus 15 V, the MPP value of an op amp is closest to 
a. 0 
b. +15V 
c. -15 V 
d. 30 V 

15. The open-loop cutoff frequency of a 741C is controlled by 
a. A coupling capacitor 
b. The output short circuit current 
c. The power bandwidth 
d. A compensating capacitor 

16. The 741C has a unity-gain frequency of 
a. 10 Hz 
b. 20 kHz 
c. 1 MHz 
d. 15 MHz 

17. The unity-gain frequency equals the product of closed-loop voltage gain and the 
a. Compensating capacitance 
b. Tail current 
c. Closed-loop cutoff frequency 
d. Load resistance 

18. If funity is 10 MHz and midband open-loop voltage gain is 1,000,000, then the open-loop cutoff frequency of the op amp is 
a. 10 Hz 
b. 20 Hz 
c. 50 Hz 
d. 100 Hz 

19. The initial slope of a sine wave increases when 
a. Frequency decreases 
b. Peak value increases 
c. Cc increases 
d. Slew rate decreases 

20. If the frequency is greater than the power bandwidth, 
a. Slew-rate distortion occurs 
b. A normal output signal occurs 
c. Output offset voltage increases 
d. Distortion may occur 

21. An op amp has an open base resistor. The output voltage will be 
a. Zero 
b. Slightly different from zero 
c. Maximum positive or negative 
d. An amplified sine wave 

22. An op amp has a voltage gain of 500,000. If the output voltage is 1 V, the input voltage is 
a. 2 microvolts 
b. 5 mV 
c. 10 mV 
d. 1 V 

23. A 741C has supply voltages of plus and minus 15 V. If the load resistance is large, the MPP value is 
a. 0 
b. +15 V 
c. 27 V 
d. 30 V 

24. Above the cutoff frequency, the voltage gain of a 741C decreases approximately 
a. 10 dB per decade 
b. 20 dB per octave 
c. 10 dB per octave 
d. 20 dB per decade 

25. The voltage gain of an op amp is unity at the 
a. Cutoff frequency 
b. Unity-gain frequency 
c. Generator frequency 
d. Power bandwidth 

26. When slew-rate distortion of a sine wave occurs, the output 
a. Is larger 
b. Appears triangular 
c. Is normal 
d. Has no offset 

27. A 741C has 
a. A voltage gain of 100,000 
b. An input impedance of 2 Mohm 
c. An output impedance of 75 ohm 
d. All of the above 

28. The closed-loop voltage gainof an inverting amplifier equals 
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 

29. The noninverting amplifier has a 
a. Large closed-loop voltage gain 
b. Small open-loop voltage gain 
c. Large closed-loop input impedance 
d. Large closed-loop output impedance 

30. The voltage follower has a 
a. Closed-loop voltage gain of unity 
b. Small open-loop voltage gain 
c. Closed-loop bandwidth of zero 
d. Large closed-loop output impedance 

31. A summing amplifier can have 
a. No more than two input signals 
b. Two or more input signals 
c. A closed-loop input impedance of infinity 
d. A small open-loop voltage gain 




Also try:

Malvino Chapter 1
Malvino Chapter 2
Malvino Chapter 3
Malvino Chapter 4
Malvino Chapter 5
Malvino Chapter 6
Malvino Chapter 7
Malvino Chapter 8
Malvino Chapter 9
Malvino Chapter 10
Malvino Chapter 11
Malvino Chapter 12
Malvino Chapter 13
Malvino Chapter 14
Malvino Chapter 15
Malvino Chapter 16
Malvino Chapter 17
Malvino Chapter 19
Malvino Chapter 20
Malvino Chapter 21
Malvino Chapter 22
Malvino Chapter 23
Malvino Chapter 24