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

• Wednesday, September 07, 2016
• • ,
• No comments

Roll No.
Total No. of Questions : 09]

DIGITAL CIRCUITS & LOGIC DESIGN
SUB.IECT CQDE : CS - 2O5
Paper ID : [AO453]
Time : 03 Hours
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
Q1)
a) Solve (10101)2, - (10011)2.
b) Subtract (i1001), from (11101)2 using 2's complement method?
c) State De-Morgan. theorem?
d) Name three types of TTL gates?
e) .What does the term driver mean-in a decoder?
f)' List two applications ‘of Multiplexer?
g) Which flip flop is preferred for data transfer?
h) What is a volatile memory?
j) What is a ring counter?

Q2) What is a BCD code? What are its advantages and disadvantages?

Q3) Prove that if A + B = A + C and A + B = A' + C, then B = C.

Q4) With the help of circuit diagram explain working of a two input TTL NAND
gate?

Q5)Describe with diagram internal architecture of PAL?

Q6)Design a circuit that will generate an even parity bit for 4 bit input and implement it using only NAND gates?

Q7)
(a) Explain the difference in operation of a monostable and astable
multivibrator?

(b) What is master slave JK flip flop / Explain its working?

Q8)Design a circuit that will function according tc state diagram given below:

Q9) (a) Implement the function

(b) ' F=ABC +ABC' +A'B'C' +AC' using PAL.
With help of neat diagram explain working of R-2R ladder type DAC.