Download GTU BE/B.Tech 2019 Winter 3rd Sem Old 130701 Digital Logic Design Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem Old 130701 Digital Logic Design Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?III (Old) EXAMINATION ? WINTER 2019
Subject Code: 130701 Date: 26/11/2019

Subject Name: Digital Logic Design
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Convert following Decimal Number to Hex, Binary and octal Number.
1) 157.786 2) 937.125
07
(b) Justify the statement: ?NAND and NOR gates are universal gates.? 07

Q.2 (a) Expand A+BC?+ABD?+ABCD to minterm and maxterm. 07
(b) Obtain the simplified expressions in SOP for the following Boolean function
using K-Map method. And implement it using NAND gate.
F(A,B,C,D) = ABC+AB?C+BCD?+A?CD
07
OR
(b) Simplify the following Boolean function by means of the tabulation method and
implement it using NAND gate. F(A,B,C,D) = ?(0,1,4,7,13,14) +d(5,8,15)
07

Q.3 (a) Design a 1:16 demultiplexer using 1:8 demultiplexer. 07
(b) Draw a truth table and logic circuit to realize the following Boolean function
using multiplexer. F(A,B,C,D)= ? ( 0, 1, 3, 6, 8, 10, 12, 15)
07
OR
Q.3 (a) With neat logic diagram, explain Universal shift register. 07
(b) Design 4-bit BCD adder using two 4-bit binary parallel adders. 07

Q.4 (a) Draw the characteristics and excitation table of JK flip flop. Design Conversion
circuit of JK Flip flop to SR Flip flop.
07
(b) Design 3-bit binary synchronous counter using JK Flip Flop. 07
OR
Q.4 (a) Define following parameters related to logic family and Compare all the logic
families based on these parameters :(i) Propagation Delay (ii) Fan-out
(iii) Fan-in (iv) Noise margin.
07
(b) Draw the state diagram of BCD ripple counter, develop it?s logic diagram and
explain the operation of circuit.
07

Q.5 (a) Draw the block diagram of a processor unit with control variables and explain
its operation.
07
(b) Discuss the differences between hard wired control & micro program control.
State their merits and demerits.
07
OR

Q.5 (a) Explain Register transfer micro operation and arithmetic micro operation. 07
(b) Explain bus organization for four processor register and ALU connected
through common buses.
07

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