1(a)
What are universal gates? Why are they called so?

2 M

1(b)
Add and subtract octal numbers 369 and 715

2 M

1(c)
Design a BCD to Excess-3 code converter.

3 M

Solve any one question from Q.1(d) & Q.1(e)

1(d)
Minimize the given Boolean function using K-map and implement the simplified function using only NAND gates.

F(A,B,C,D)= Σm(0,1,2,9,11,15)+d(8,10,14)

F(A,B,C,D)= Σm(0,1,2,9,11,15)+d(8,10,14)

7 M

1(e)
Minimize the given Boolean function using Quine-McCluskey method

F(a,B,C,D)= Σm(0,2,3,6,7,8,9,10)

F(a,B,C,D)= Σm(0,2,3,6,7,8,9,10)

7 M

2(a)
Draw the truth table and logic diagram of full adder.

2 M

2(b)
Draw the logic diagram of BCD adder and explain its working.

2 M

2(c)
Draw the logic diagram of Ex-NOR gate using only NOR gates.

3 M

Solve any one question from Q.2(d) & Q.2(e)

2(d)
Design a full subtractor circuit using decoder and OR gates.

7 M

2(e)
Draw the logic of Ex-NOR gate using only NOR

7 M

3(a)
Explain the terms-monostable,bistable and bistable and astable multivibrator.

2 M

3(b)
Write characteristic of digital logic families.

2 M

3(c)
Draw the circuit diagram of 2 input NAND gate (CMOS) and input NOR gate (TTL) and explain their working.

3 M

Solve any one question from Q.3(d) & Q.3(e)

3(d)
Draw the circuit diagram of Schmitt trigger and explain it working.

7 M

3(e)
Compare the following digital logic families RTL, DTL, TTL, ECL and CMOS.

7 M

4(a)
Draw the logic diagram of priority encoder and explain its working

2 M

4(b)
How a multiplexer can be used as a ROM?

2 M

4(c)
Design a 4-bit synchronous up counter using J-K flip-flops.

3 M

Solve any one question from Q.4(d) & Q.4(e)

4(d)
Implement the following Boolean function using 4:1 multiplexer using 4:1 multiplexer using A and B variables to the selection lines, F(A,B,C)= Σm(1,4,5,7)

7 M

4(e)
What is RAM? Distinguish between SRAM and DRAM. What is PLA?

7 M

5(a)
What is need of among to digital conversion?

2 M

5(b)
Draw the circuit diagram of sample and hold circuit and explain it working.

2 M

5(c)
Write short note on V-F converters.

3 M

Solve any one question from Q.5(d) & Q.5(e)

5(d)
Enlist the various types of Analog to Digital (A/D) converter and explain any one if them with neat sketch.

7 M

5(e)
Explain the operation of R-2R ladder type Digital to analog(D/A) converter with a neat sketch.

7 M

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