## Digital Circuits And Logic Design Question Paper of 3rd Semester CSE74 Download Previous Years Question Paper 7

• Wednesday, September 07, 2016

Roll No.
Total No. of Questions : 09
B.Tech.(CSE/IT) (Sem.–3)
DIGITAL CIRCUITS AND LOGIC DESIGN
Subject Code : BTCS-303 (2011 Batch)
Paper ID : [A1125]
INSTRUCTIONS TO CANDIDATE:
1. Section-A is compulsory.
2. Attempt any 4 questions from Section-B. And any two questions from Section-C.

SECTION-A
Q.1.
(a) State Duality Theorem.
(b) What is the difference between k- map and Qm method?
(c) Differentiate Combinational and Sequential Circuits.
(d) What do you mean by non-weighted code? Give example.
(e) What is Bidirectional shift register?
(f) How many flip flops are required for Mod- 6 Counter?
(g) Differentiate Static RAM and Dynamic RAM.
(h) What is the importance of parity bit?
(i) Differentiate More and Mealy Machines.
(j) Discus the following:
a) Noise Margin b) Fan in

SECTION-B

Q.2. What is a Decoder? Compare a decoder and a demultiplexer with suitable block diagrams.

Q.3. Explain the concept of Triggering? Also differentiate Edge Triggering and level Triggering.

Q.4. Draw and explain the operation of TTL NAND Gate. Q.5. Design a full Subtract or circuit using NAND gates only.

Q.6. Draw the circuit diagram of a mod-10 Synchronous Counter.

SECTION-C

Q.7. What is Race Around Condition? How it can be avoided. Also discuss the working of Master Slave J-K Flip Flop.

Q.8. Write a note on following:-

(a) Boolean Algebra
(b) Magnitude Comparator
(b) ASCI Code
(d) Multiplexer Tree

Q.9. Draw the circuit of a R-2R ladder D-A converter and explain its operation. Also determine the resolution of the output from a DAC that has a 12bit input