Page 265 - Op Amps Design, Applications, and Troubleshooting

Review Questions 247

REVIEW QUESTIONS

1. Refer to Figure 5.2. What is the effect on circuit operation if capacitor C 2 becomes
open?
2. If the DC level on the output of the op amp in Figure 5.2 is normal but there are no AC
signals present, is capacitor Q open a possible cause? Explain your answer.
3. Refer to Figure 5.7. If capacitor C 2 opens, will the DC level on the output of the op
amp be affected? Explain.
4. If resistor R 3 shorts in Figure 5.7, what is the effect on circuit operation?
5. A circuit that passes all frequencies below the cutoff frequency is called a filter.
6. A circuit that rejects a very narrow band of frequencies is called a filter.
7. Refer to Figure 5.12. The ratio of resistor R 4 and resistor R 3 establishes the gain of the
amplifier. (True or False)
8. Refer to Figure 5.15. What is the effect on circuit operation if capacitor C 2 becomes
open?
9. Refer to Figure 5.15. What is the effect on the DC level on the output of the op amp if
resistor R 2 becomes shorted?
10. Refer to Figure 5.18. Which of the following defects can cause the circuit to respond
like a high-pass filter?
a. Q open
b. .Rj open
c. R 4 shorted
d. C 2open
e. R 3 shorted