CS/B.
TECH(N)/ODD/SEM-3/3461/2023-2024/I123
MAULANA ABUL KALAM AZAD UNIVERSITY OF TECHNOLOGY, WEST BENGAL
Paper Code : EC302 Digital System Design
UPID : 003461
Time Allotted : 3 Hours Full Marks :70
The Figures in the margin indicate full marks.
Candidate are required to give their answers in their own words as far as practicable
Group-A (Very Short Answer Type Question)
1. Answer any ten of the following : [ 1 x 10 = 10 ]
(I) In what aspect, HDLs differ from other computer programming languages?
(II) How we can realize a full adder?
(III) The R-S latch is a_____.
(IV) What is the storage cell of DRAM made of?
(V) Which is the fastest RAM?
(VI) Convert (7A)16 into a BCD number.
(VII) What are the three output conditions of a tri-state buffer?
(VIII) What do you mean by Figure of Merit of a Digital IC?
(IX) VHDL stands for ________.
(X) Name a self-complementing code.
(XI) Which adder is an example of sequential circuits?
(XII) Radio frequency integrated circuit (RFIC) is a sub-type of which IC?
Group-B (Short Answer Type Question)
Answer any three of the following : [ 5 x 3 = 15 ]
2. How many types of number systems are there? What are the applications of the octal and hexadecimal [5]
number systems?
3. What is VHDL? State the features of VHDL. [5]
4. Why NAND and NOR are known as universal gates? Design EXOR gate using NAND & NOR gates. [5]
5. Design a circuit of a 4-bit parallel adder subtractor. [5]
6. Classification of Integrated Circuits. [5]
Group-C (Long Answer Type Question)
Answer any three of the following : [ 15 x 3 = 45 ]
7. (a) What are the languages that are combined together to get the VHDL language? What are the VHDL [5]
structural elements?
(b) What is an entity in VHDL? Name the different abstraction levels in VHDL. [5]
(c) What is architecture in VHDL? [5]
8. (a) Design a full adder using MUX. [5]
(b) Design a full adder using Decoder. [5]
(c) Design a full adder using a NAND gate. [5]
9. (a) Design a 4-Bit Synchronous Up/Down Counter using JK flip-flops. [5]
(b) What are the different types of Finite state machines? [5]
(c) Compare Moore and Mealy machines. [5]
10. (a) Design Decimal to BCD encoder. [5]
(b) Mention the drawbacks and uses of the encoders. [5]
(c) Design a 4:2 Priority Encoder. [5]
11. (a) Design a 4-Bit Synchronous Down Counter using JK flip-flops. [5]
(b) What are the steps involved in sequence generator? [5]
(c) Compare Asynchronous Sequential circuits and Synchronous Sequential circuits. [5]
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