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Quiz#3

The document is a quiz for the Linear Integrated Circuits & Applications course at the Karachi Institute of Economics & Technology, dated August 30, 2023. It consists of multiple-choice questions covering topics such as passive filters, bandwidth calculations, oscillator characteristics, and feedback mechanisms. The quiz is designed to assess students' understanding of key concepts in the field of electronics.

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Nouman Memon
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36 views2 pages

Quiz#3

The document is a quiz for the Linear Integrated Circuits & Applications course at the Karachi Institute of Economics & Technology, dated August 30, 2023. It consists of multiple-choice questions covering topics such as passive filters, bandwidth calculations, oscillator characteristics, and feedback mechanisms. The quiz is designed to assess students' understanding of key concepts in the field of electronics.

Uploaded by

Nouman Memon
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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KARACHI INSTITUTE OF ECONOMICS & TECHNOLOGY

Linear Integrated Circuits & Applications


Quiz #3 Dated:30-08-2023
[CLO-3 PLO-3 C3 (Apply)] Time allowed: 20 minutes Marks-18, Weightage-9.0
1. Passive filters are made of ___________.
a. Diode and transistors b. Diode and transistors
c. Operational amplifiers d. None of these

2. Given the lower and higher cut-off frequency of a band-pass filter are 2.5kHz and 10kHz. Compute its
bandwidth.
a. 750 Hz b. 7500 Hz
c. 75000 Hz d. None of above
3. The gain of the first order low pass filter
a. Increases at the rate 20dB/decade b. Increases at the rate 20dB/decade
c. Increases at the rate 40dB/decade d. Increases at the rate 40dB/decade
4. Determine the order of filter used, when the gain increases at the rate of 60dB/decade on the stop band.
a. Band-pass filter b. Band-pass filter
c. Low pass filter d. Low pass filter
5. The problem of passive filters is overcome by using_____
a. Analog filter b. Analog filter
c. Active filter d. Active filter
6. Find out the low pass filter from the given frequency response characteristics.

Figure 1 (a) Figure 1 (b) Figure 1 (c)

7. If a filter has six second order stages and one first order stage, the order is
a. 7 b. 13
c. 12 d. 15
8. In a certain low pass filter 𝑓𝑐 = 3.5𝑘𝐻𝑧. Its pass band is
a. 0 to 3.5 kHz b. 0 Hz
c. 3.5 kHz d. 7 KHz
9. The filter having non-linear phase and ripples in response is __________.
a. Chebyshev b. Butterworth
c. Bessel d. None of these

10. An oscillator produces _________ oscillations.


a. Damped b. Undamped
c. Modulated d. None of these
11. In phase shift oscillator, we use _______ RC sections.
a. 2 b. 3
c. 4 d. 6

12. An Oscillator employs a ______ feedback.


a. Positive b. Negative
c. Neither positive nor negative d. Data insufficient
13. An oscillator differs from amplifier because it
a. Has more gain b. Require no input signal
c. Require no DC supply d. Always has the same input
14. One condition for oscillator is
a. A phase shift around the feedback loop of 180 b. A gain around feedback is 1/3
c. A phase shift around the feedback loop of 0 d. A gain around feedback is less than 1
15. A second condition for oscillation is
a. No gain around the feedback loop b. A gain of 1 around the feedback
c. The attenuation of the feedback circuit must be d. The feedback circuit must be
one-third capacitive
16. A phase-shift oscillator has
a. Three RC circuits b. Three LC circuits
c. A T-type circuit d. A -type circuit
17. For an oscillator to properly start, the gain around the feedback loop must initially be
a. 1 b. Less than 1
c. Greater than 1 d. Equal to B
18. The Wien-bridge oscillator’s positive feedback circuit is
a. An RL circuit b. An LC circuit
c. A voltage divider d. A lead-lag circuit

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