CS/CT/CO/CI-304 (GS)

CS-304 : Digital Systems

CI-304 : Digital Circuits and System

B.Tech. III Semester
Examination, June 2023
Grading System (GS)
Max Marks: 70 | Time: 3 Hours

Note:
i) Attempt any five questions.
ii) All questions carry equal marks.

Previous Year Questions (June 2023)

Q.1

a) Convert the following: (Unit 1)

i) $(B2F8)_{16} = (?)_{8}$

ii) $(113.2)_{8} = (?)_{2}$

iii) $(01000111)_{2}$ ------ $(.........)_{Gray}$

iv) $(249)_{10}$ ----------- $(.........)_{BCD}$

v) $(A2B.1A)_{16} = (?)_{10}$


b) Convert the following expression into sum of product and product of sums. (Unit 1)

$X' + X (X + Y') (Y + Z')$


Q.2

a) What do you mean by logic gates? Describe the various types of gates. (Unit 1)


b) What do you understand by Adder Circuit? Design and Implement Full Adder using Two half adder and OR Gate. (Unit 2)


Q.3

a) Draw and explain the BCD adder circuit. (Unit 2)


b) Realize the function $f(A, B, C, D) = \pi(1, 4, 6, 10, 14) + d (0, 8, 11, 15)$ using: (Unit 2)

i) 16:1 MUX

ii) 8:1 MUX


Q.4

a) What is meant by 'edge triggered'? Differentiate SR-FF and JK-FF with their functional operation and excitation tables. (Unit 3)


b) Describe the 4-bit universal shift register with a neat diagram. (Unit 3)


Q.5

a) Design a 4-bit up/down Synchronous binary counter. Explain with a neat timing diagram. (Unit 3)


b) Explain the principle working of sample and hold circuit. (Unit 4)


Q.6

a) An n-bit Analog to Digital converter (ADC) is required to convert an analog input in the range 0-5 V dc to an accuracy of 5mv. Find the value of n. (Unit 4)


b) With the help of circuit diagram explain the working of V-F converters. (Unit 4)


Q.7

a) With the help of Block diagram explain the working of BPSK modulation scheme. (Unit 5)


b) What do you understand by Multiplexing? Explain the working principle of Time Division Multiplexing with suitable diagram. (Unit 5)


Q.8

Write a short notes on any two :

i) Schmitt trigger (Unit 4)

ii) PLA (Unit 3)

iii) Look ahead carry generator (Unit 2)

iv) Karnaugh Map (Unit 1)