CS/B.TECH (ECE-New)/SEM-4/EC-402/2012
2012
DIGITAL ELECTRONICS AND INTEGRATED
CIRCUITS
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
(Multiple Choice Type Question)
1. Choose the correct alternatives for any ten of the following:
10 x 1 = 10
i) If 61 
= 7, the base of the number system is
a) 4 b) 8
c) 6 d) 9
ii) Which family has the better noise margin?
a) ECL b) DTL
c) MOS d) TTL
iii) The number of flip-flops required for a MOD-10 ring counter is
a) 4 b) 10
c) 5 d) none o these.
iv) A serial adder requires
a) one half adder b) two full adders
c) one full adder d) one multiplexer.