11. Find R1 and RF in the lossy integrator so that the peak gain and the gain down from its peak is 40db to 6db. Assume ω=20,000 rad/s and capacitance = 0.47µF.
A. R1 = 10.6Ω, RF = 106Ω
B. R1 = 21.2Ω, RF = 212.6Ω
C. R1 = 42.4Ω, RF = 424Ω
D. R1 = 29.8Ω, RF = 298Ω
12. Why a resistor is shunted across the feedback capacitor in the practical integrator?
A. To reduce the operating frequency
B. To enhance low-frequency gain
C. To enhance error voltage
D. To reduce error voltage
13. Find the application in which integrator is used?
A. All of the mentioned
B. Analog Computers
C. FM Detectors
D. AM detectors
14. At what condition the input signal of the integrator is integrated properly
A. T = RFCF
B. T ≤ RFCF
C. T ≥ RFCF
D. T ≠ RFCF
15. What happens if the input frequency is kept lower than the frequency at which the gain is zero?
A. Circuit acts like a perfect integrator
B. Circuit acts like an inverting amplifier
C. Circuit acts like a voltage follower
D. Circuit acts like a differentiator
16. Match the correct frequency range for integration. (Where f –> Input frequency and fa –> Lower frequency limit of integration)
1. f a | i. Results in 50% accuracy in integration |
2.f = fa | ii. Results in 99% accuracy in integration |
3.f = 10fa | iii. No integration results |
A. 1-iii, 2-i, 3-ii
B. 1-i, 2-ii, 3-iii
C. 1-ii, 2-iii, 1-i
D. 1-iii, 2-ii, 3-i
17. Differentiation amplifier produces
A. Output waveform as the integration of input waveform
B. Input waveform as the integration of output waveform
C. Output waveform as derivative of the input waveform
D. Input waveform as derivative of the output waveform
18. Determine the output voltage of the differentiator?
A. VO = RF×C1×[dVin/dt].
B. VO = -RF×C1×[dVin/dt].
C. VO = RF×CF×[dVin/dt].
D. None of the mentioned
19. which factor makes the differentiator circuit unstable?
A. Output impedance
B. Input voltage
C. Noise
D. Gain
20. The increase in the input frequency of the differentiation amplifier to input impedance creates
A. Component noise
B. External noise
C. Low-frequency noise
D. High-frequency noise