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SPPU Electrical Engineering (Semester 3)
Analog and Digital Electronics
December 2016
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question from Q.1(a,b) & Q.2(a,b)
1(a) Perform following arithmetic operations:
1) (3A.2F)16 into decimal
3)(0.BF85)16 into octal.
6 M
1(b) Explain the operations of JK flip-flop with truth table. What do you mean by race round condition in JK flip-flop?
6 M

2(a) Represent the following four variable logic function using K map: $F\left ( A, B, C, D \right )=\sum m\left ( 0, 1, 2, 3, 5, 7, 8, 9, 11, 14 \right )$
6 M
2(b) What is the difference between asynchronous and synchronous counter?
6 M

Solve any one question from Q.3(a,b) & Q.4(a,b)
3(a) Explain the function of 78XX and 79XX voltage regulator.
6 M
3(b) Explain the working of OP-AMP as an instrumentation amplifier. State applications.
7 M

4(a) Explain the working of IC 555 as Monostable multivibrator.
6 M
4(b) Draw neat diagram and explain operation of OP-AMP as sine wave generator with output waveforms.
7 M

Solve any one question from Q.5(a,b) & Q.6(a,b)
5(a) Derive equation for DC load line and show Q point on DC load line.
6 M
5(b) Describe operation of transformer coupled two stage amplifier with advantages and disadvantages.
7 M

6(a) Write a short note on push-pull amplifier with waveforms.
7 M
6(b) Draw and explain JFET output characteristic.
6 M

Solve any one question from Q.7(a,b) & Q.8(a,b)
7(a) Explain the working of single-phase full-wave bridge rectifier with RL load.
6 M
7(b) Draw a neat diagram of three-phase full-wave bridge rectifier with R load and explain its working.
6 M

8(a) Draw and explain full-wave precision rectifier.
6 M
8(b) A single-phase full bridge diode rectifier is supplied form 230V, 50 Hz source. The load consists of R = 10Ω and a large inductance so as to keep load current constant, Determine:
1) Average values of output voltage and current.
2) Average and rms value of diode current.
6 M

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