Electronics And Communication Engineering (Semester 5)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
PART - A
1.a.
List the AC characteristics of op-amp.
(2 marks)
00
1.b.
What are the different features of IC 723?
(3 marks)
00
1.c.
What is the significance of VCO in PLL?
(2 marks)
00
1.d.
Compare active and passive filters.
(3 marks)
00
1.e.
What are the applications of ADC?
(2 marks)
00
1.f.
An 8 bit D/A converter as a resolution of 8mV/bit. Find the analog output voltage for
the input 10111010.
(3 marks)
00
1.g.
Which IC is used as BCD code converter?
(2 marks)
00
1.h.
How to drive CMOS gate to TTL gate?
(3 marks)
00
1.i.
How to convert JK flip-flop to D flip flop?
(2 marks)
00
1.j.
List different types of memories.
(3 marks)
00
PART - B
2.a.
Explain the working of Non-Inverting amplifier and derive the equation of its Gain.
(6 marks)
00
2.b.
How op-amp is used as a differentiator? Explain
(4 marks)
00
OR
3.a.
Explain the working of a Schmitt trigger with neat circuit diagram.
(5 marks)
00
3.b.
How op-amp is used for comparator? Explain its working.
(5 marks)
00
4.a.
Design an active high pass filter with cutoff frequency of 4KHz.
(5 marks)
00
4.b.
How to generate a sawtooth wave form? Explain the working of such a circuit with neat circuit diagram.
(5 marks)
00
OR
5.a.
Draw the functional block diagram of 565IC and explain its working.
(5 marks)
00
5.b.
Explain the working of an Astable multivibrator using IC555 with circuit diagram.
(5 marks)
00
6.
Explain the working of R-2R ladder DAC with neat circuit diagram and write its
limitations.
(10 marks)
00
OR
7.
Explain the working of dual slope ADC with neat circuit diagram and compare its
performance with other ADC.
(10 marks)
00
8.
Design a driving circuit for LED and which 74XX series IC is used for it.
(10 marks)
00
OR
9.
Design a Priority encoder circuit and which 74XX series IC is used for it.
(10 marks)
00
10.
Design a synchronous counter using 74XX ICs and explain its working with neat
timing waveforms.
(10 marks)
00
OR
11.
Design a decode counter using Jk-Flip-Flops.
(10 marks)
00
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