JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II Year SWITCHING THEORY AND LOGIC DESIGN Previous Question Paper (September/October - 2023 - R15)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
State the basic theorems in boolean algebra.
Answer
The basic theorems of Boolean algebra include the Commutative law (A+B=B+A, AB=BA), Associative law (A+(B+C)=(A+B)+C, A(BC)=(AB)C), Distributive law (A(B+C)=AB+AC), Identity law (A+0=A, A·1=A), Complement law (A+A'=1, A·A'=0), and Idempotent law (A+A=A, A·A=A).
Convert 10101101.0111 to octal equivalent and hexadecimal equivalent.
Answer
To convert 10101101.0111 to octal, group bits in threes: (010)(101)(101).(011)(100) = 255.348. To convert to hexadecimal, group bits in fours: (1010)(1101).(0111) = AD.716.
List out the applications of Combinational circuits.
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Draw a four-bit adder circuit using full adders.
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Compare latch and flip flop.
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What is meant by Clock Skew?
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Define State Diagram and State Table.
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What are the advantages of Ring Counter?
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Define Mealy Circuit.
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Mention the salient features of the ASM chart.
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Part B
What is Universal Gates? Realize all the logic gates using NAND.
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How is the error detection and correction carried out using the parity method in digital data transmission?
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Prove that
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Convert the Boolean function
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Find the minimal sum of products for the Boolean expression,
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What is the drawback of a 4-bit parallel adder? And explain how to overcome the drawback with the help of a carry look-ahead adder.
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Minimize the following expressions using K-map and realize using NAND Gates.
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What is a multiplexer? Implement the Boolean function
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Differentiate combinational and sequential circuits.
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Design SR Flip Flop using JK-Flip Flop.
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Convert the T flip-flop into the D and JK flip-flops.
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What are the fundamentals of Sequential machine operation?
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Draw the circuit diagram of the MOD-10 Counter and explain its operation.
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Describe a 4-bit Universal shift register with a neat diagram.
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What is a shift register? Explain the following modes of operations in a four-bit shift register (i) shift right (ii) shift left (iii) bidirectional.
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Design a Mod-5 synchronous counter using T flip-flops.
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Differentiate between an ASM chart and a conventional flow chart.
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Explain the procedure for state minimization using the merger graph and merger table.
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With the help of the State table and State diagram explain the operation of the Sequence generator.
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Explain in detail the ASM technique of designing a sequential circuit.
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