1(a)
With appropriate circuit diagram explain theDC load line analysis of semi conductor diode.

5 M

1(b)
In a full wave rectifier, the input is from 30-0-30V transformer. The load and diode forward resistances are 100Ω and 10Ω respectively. Calculate the average voltage, dc output power, ac input power, rectification efficiency and percentage regulation.

5 M

1(c)
Explain the working of positive clamping circuit.

5 M

1(d)
In a Common Emitter transistor circuit ifΒ= 100 and I

_{B}= 50μA,compute the values of α, I_{E}and I_{c}.
5 M

2(a)
With a neat circuit diagram and waveforms explain the working of full wave bridge rectifier and show that its ripple factor is 0.48.

8 M

2(b)
Draw the common emitter circuit and sketch theinput and output characteristics. Also explain active region, cutoff region and saturation region by indicating them on the characteristic curve.

7 M

2(c)
Design Zener voltage regulator for the following specifications:Input Voltage=10V±20%, Output Voltage=5V,I

_{L}=20mA,I_{zmin}=5mA and I_{zmax}=80mA.
5 M

3(a)
With a neat circuit diagram explain the Voltage Divider Bias circuit by giving its exact analysis.

8 M

3(b)
Explain the characteristics of an Ideal Op-Amp. Mention some of the applications of Op-Amp.

6 M

3(c)
Determine the operating point for a silicon transistor biased by base bias method with β= 100, R

_{B}= 500KΩR_{C}= 2.5KΩ and V_{CC}= 20V. Also draw the DC load line.
6 M

4(a)
Explain how Op-Amp can be used as

i)Integrator ii) Inverting Summer and iii) Voltage Follower

i)Integrator ii) Inverting Summer and iii) Voltage Follower

10 M

4(b)
Find the output of the following Op-Amp Circuits.

i)

ii)

10 M

5(a)
State and prove DeMorgan's Theorems for three variables.

4 M

5(b)
Realize two input Ex-OR gate using only NAND gates.

5 M

5(c)
Design Full Adder and Implement it using two half adders.

6 M

5(d)
With the help of switching circuit, Input/output waveforms and truth table explain the operation of a NOT Gate.

5 M

6(a)
Design a logic circuit using basic gates with three inputs A,B, C and output Y that goes low only when A is high and B and C are different

5 M

6(b)
Convert i) (1AD.E0)

_{16}=(?)_{10}=(?)_{8}ii)(356.15)_{8}=(?)_{2}==(?)_{10}
5 M

6(c)
(i)Subtract (1111.101)

ii)Subtract (11101.111)

_{2}from (1001.101)2using 1's compliment method.ii)Subtract (11101.111)

_{2}from (11111.101)_{2}using 2's compliment method.
5 M

6(d)
Simplify \[Y=AB+\overline{AC}+ABC(A\overline{B}+C)\]

5 M

7(a)
Define Flip Flop. Give the difference between Latch and Flip Flop.

4 M

7(b)
Explain the working of LVDT.

6 M

7(c)
With the help of logic diagram and truth table explain the working of clocked RS Flip Flop.

5 M

7(d)
List the differences between Microprocessor and Microcontroller.

5 M

8(a)
With a neat block diagram explain the architecture of 8085 Microprocessor

9 M

8(b)
What is a Transducer? Distinguish between active and passive transducers.

5 M

8(c)
Explain i) Hall Effect ii) Seebeck Effect iii) Peltier Effect

6 M

9(a)
What are the commonly used frequency ranges in communication systems? Mention the applications of each range.

4 M

9(b)
Define AM. Draw the AM signal and its Spectrum. Derive an expression for total power in an AM signal.

6 M

9(c)
Calculate the percentage power saving when one side band and carrier is suppressed in an AM signal with modulation index equal to 1.

5 M

9(d)
With a network diagram explain the working of typical switched telephone system.

5 M

10(a)
With a block diagram explain typical cellular mobile radio unit.

5 M

10(b)
What is ISDN? Explain the services of ISDN.

5 M

10(c)
Give the comparison between AM and FM.

4 M

10(d)
With a neat block diagram explain optical fibre communication system.

6 M

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