## Digital Circuits And Logic Design Question Paper of 3rd Semester CSE74 Download Previous Years Question Paper 11

• Wednesday, September 07, 2016

Roll No.
Total No. of Questions : 09
B.Tech.  (Sem.–3)
DIGITAL CIRCUITS & LOGIC DESIGN
Subject Code : CS-205
Paper ID : [A0453]
Time : 3 Hrs.
Instruction to candidates :
1.      Section –A is Compulsory.
2.     Attempt any Four questions from section –B
3.     Attempt any Two questions from section –C

Section –A
1.
a.     How many select lines are required for a 10 to 1 MUX?
b.     List the various types of A/D converters.
c.      How ROM is different from RAM?
d.     Divide(10101011)2 by(101)2
e.      Construct the table for Z = xy + xy
f.       If A= 1010 and =1001, find A-B using 2’s complement method.
g.     How sequential circuits are different from combinational circuits?
h.     Compare TTL with ECL.
i.       Compare synchronous counters with asynchronous counters.
j.       Minimize the following expressions
i.      A+(B+C)
ii.      (AB(C+D)+C)
Section –B

2.     Minimize the following expression using K- map
a.     Y =(A+B)(A+B)(A+C)
b.     Y = AB+ABC+AB

3.     Design 8:1 MUX by using two 4:1 MUX

4.     What is race around condition ? how it is avoided in Master slave flip flop?

5.     Explain the working of successive approximation A/D converter.

6.     Write short note on the following:

a.     CMOS
b.     RTL
Section –C
7.
a.     Design full adder using logic gates.
b.     Design EX-OR gate using NAND gates only:

8.     Design mod- 8 synchronous counter using T flip flops.

9.     Explain the different types of ROMs. Discuss their advantages and disadvantages