University of Mumbai 2008-3rd Sem B.E Electrical and Electronics Engineering Digital Electronics - Question Paper
Digital Electronics Sem III May 2008
Con. 2611-08. (REVISED COURSE) CO-9512
(3 Hours) [Total
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N.B. (1) Question No 1 is compulsory. (3) Figures to the right indicate full marks. 1. (a) Fxplain Gray Code and give applications. |
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(b) |
Explain Error Correcting Codes |
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<c) |
Convert from Hex to Binary (0 A25)ir |
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W |
Convert (371)Bto equivalent hexadecimal form. |
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2. (a) |
Explain Alphanumeric Codes |
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<b> |
Reform following conversions : |
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(c) |
(i) (919*89),n to binary (ii) (625'625)10 to octal Peform the following arithmatic |
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(i) (11001)* x (110)2 |
(ii) 1101001 + 101
3. (a) Simplify the following using Boolean theorems ; 10
(i) |(A + AB) (A + AB)] [(CD + CD) + (C ffi D)].
(Ii) XYZ + XYZ + XYZ + XYZ.
(b) Implement the following using 2 input NOR gates: 10
(i) Y = AB + 1C (il) Z = A # B.
4. (a) Explain Ring Counter. 8
(b) Write shorl notes on 12
(I) Programmable logic array
(ii) Serial in Parallel out register.
5. (a) Write short notes on :- 10
(i) Fan out. Fan in
(ii) Propagation Delay.
(b) Explain interfacing of following logic families : 10
(I) TTL driving CMOS (il) CMOS driving TTL.
6. (a) Explain what is master slave flip-flop and give its applications. 10
(b) Give difference between synchronous counter and asynchronous counter. Give 10 merits and demerits of these counters.
Simplify this using K-map. 8
7. (a) (b)
F(A, B, C, D) = Im (1, 5, 6. 7.11. 12, 13,15).
Minimise expression using Guine-McCluskey method. 12
f(A, B. C. D) = 2m (1, 3, 5, 10, 11, 12. 13, 14, 15).
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Attachment: |
| Earning: Approval pending. |
