Integrator – 2 MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Integrator – 2″.

1. What will be the output voltage waveform for the circuit, R1×CF=1s and input is a step voltage. Assume that the op-amp is initially nulled.

Find the output voltage waveform from the circuit

a) Triangular function
b) Unit step function
c) Ramp function
d) Square function

2. 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

3. Find the range of frequency between which the circuit act as integrator?
a) [1/(2πRFCF)]– (2πR1CF)
b) (2πRFCF) – [1/(2πR1CF)].
c) [1/(2πRFCF)]- [1/(2πR1CF)].
d) None of the mentioned

4. Why a resistor is shunted across the feedback capacitor in the practical integrator?
a) To reduce operating frequency
b) To enhance low frequency gain
c) To enhance error voltage
d) To reduce error voltage

5. At what condition the input signal of the integrator is integrated properly
a) T = RFCF
b) T ≤ RFCF
c) T ≥ RFCF
d) T ≠ RFCF

6. What happens if the input frequency is kept lower than the frequency at which the gain is zero?
a) Circuit act like a perfect integrator
b) Circuit act like an inverting amplifier
c) Circuit act like a voltage follower
d) Circuit act like a differentiator

7. Find the application in which integrator is used?
a) All of the mentioned
b) Analog Computers
c) FM Detectors
d) AM detectors

8. Find the output waveform for an input of 5kHz.


Find the output voltage of integrator from the given diagram
Find the constant amplitude from the given diagram
Find the half periods ramp from the given diagram
d) None of the mentioned

9. Match the correct frequency range for integration. (Where f –> Input frequency and fa –> Lower frequency limit of integration)

1.f << fai. Results in 50% accuracy in integration
2.f = faii. Results in 99% accuracy in integration
3.f = 10faiii. 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

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