11. To obtain a faster slew rate the op-amp should have
A. High current and large compensating capacitor
B. Small compensating capacitor
C. High current or small compensating capacitor
D. Low current or large compensating capacitor
12. Find the expression for full power response.
A. fmax(Hz) =(slew rate×106)/(6.28×Vm)
B. fmax(Hz) =slew rate /(628×106×Vm)
C. fmax(Hz) =(slew rate×Vm×106)/6.28
D. fmax(Hz) =(6.28×Vm× 106)/ slew rate
13. Calculate the time taken by the output to swing from +14v to -14v for a 741C op-amp having a slew rate of 0.5V/µs?
A. 22µs
B. 42µs
C. 56µs
D. 70µs
14. Consider a square wave having a peak to peak amplitude of 275mv and it is amplified to a peak to peak amplitude of 4v, with rise time of 5.2µs. Calculate the slew rate?
A. 0.615 v/µs
B. 0.712 v/µs
C. 0.325 v/µs
D. None of the mentioned
15. Determine the maximum input signal to be applied to an op-amp to get distortion-free output. If the op-amp used is an inverting amplifier with a gain of 50 and the maximum output amplitude obtained is 4.2V sine wave?
A. 159mv
B. 0.168mv
C. 207mv
D. 111mv
16. What happens if the frequency or amplitude of the input signal is increased to exceed the slew rate of the op-amp?
A. All of the mentioned
B. High-frequency output
C. Distorted output
D. Large amplitude output
17. Compute the peak output amplitude, when the voltage gain versus frequency curve of 741C is flat upto 25Hz.
A. 4Vpeak
B. 9Vpeak
C. 20Vpeak
D. None of the mentioned
18. Calculate the maximum input frequency at which the output will be distorted from the given specifications
Vo = 30 Vpp ; Slew rate = 0.6v/µs.
A. 1000Hz
B. 10kHz
C. 1kHz
D. 10kHz
19. Match the AC parameter of the op-amp in column 1 with column 2.
Column 1 | Column-2 |
1. Bandwidth | i . a large signal phenomenon |
2. Transient response | ii. Rise time is related to bandwidth and overshoots measure stability |
3. Slew rate | iii. Depends on compensating components and closed-loop gain |
A. 1-i 2-iii 3-ii
B. 1-ii 2-iii 3-i
C. 1-iii 2-ii 3-i
D. 1-iii 2-i 3-ii
20. The major source of the interference with the desired signal in an electronic system is called
A. Error signal
B. Interference signal
C. Noise signal
D. Faulty signal
21. Identify the external noise sources
A. Switching of rotating machinery
B. Control circuits
C. Ignition system
D. All of the mentioned
22. Which among the following is not a source of internal noise?
A. AC random voltages generated within conductors
B. Lightning
C. Switching of circuits
D. None of the mentioned
23. The type of noise phenomena that increases with an increase in temperature is
A. 1/f noise
B. Schottky noise
C. Thermal noise
D. None of the mentioned
24. The factors that determine the amount of noise induced is
A. Type of coupling between two circuits
B. Rate of change of current per unit time
C. Speed of operation of the circuit
D. All of the mentioned
25. Which type of noise is produced when the op-amp has wider bandwidth?
A. 1/f noise
B. Schottky noise
C. Thermal noise
D. Radiant noise