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Thursday, 23 November 2017

ECE202 : Digital Electronics Circuits Question Paper


Question 1 : 
(a) Find the 2s complement of the following binary numbers:
A. 101110 B.110011.11

(b) Find the 5s and 10s complement of the following:
A. (43210)6 B. (000000)10

Question 2 :
(a) Find the largest binary number that can be taken with 16 bits decimal number. 
(123)6 =( ? )3 =( ? )2 =( ? )5=( ? )10=( ? )7=( ? )8=( ? )16

(b) Convert the following numbers from given number system to desired number system.
(123)11 =( ? )2 =( ? )4=( ? )10=( ? )7=( ? )8=( ? )16 

Question 3 : Covert the following letters in ASCII Code.
1. DEVYANI
2. s14

Question 4 : (a) 
Draw a circuit to realize the function:
F= ABC+DE+F
using NOR gates only
4.(b) Simplify the expression Z=AB+AC+ABC(AB+C). Implement using minimum number of NAND Gates.

Question 5 : 
Given the Boolean function:
XY+XY+YZ
Implement it 
(i) with OR and NOT gates.
(ii) with AND and NOT gates. 

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