Thursday, September 8, 2016
B.TECH. 3RD SEMESTER
EC-205- DIGITAL ELECTORNICS
Time :3 hrs
Note : This paper consists of three sections. Section A is compulsory. Attempt any four questions form section B and two form Section C.
a. List the advantages of hexadecimal number system.
b. How will you detect overflow in signed-magnitude and Z’s complement integer additions.
c. Realize a z –input XOR gate using NAND gates only.
d. Simplify(A.B(C+B.D)+ A,B.) C.
e. What is meant by CAM ?
f. What do you understand by ‘race condition’ in flip-flops?
g. How many bits will a D/A converter use so that its full-scale output voltage is 5V and its
resolution is at the most 10mv.
h. Name the four triggering methods.
i. Define ‘propagation delay time’ and ‘figure of merit’
j. What are advantages of CMOS logic family over other logic families.
2. Minimize the function using K-map method and implement the same using NAND/NOR
gates. F(A,B,C,D) = TTM (1,2,3,8,9,10,11,14). D(7,15)
3. What is a ROM? What are the different types of ROMs? Give the characteristics features of
4. What is PLA? Design a BCD to excess- 3 code converter using PLA.
5. Draw the circuit of a 3 – input ECL nor gate & discuss its operation what is the primary
advantages of ECL gate.
6. Devise a method of measuring frequency by means of a counter. Draw the circuit.
a. Convert a given Dflip- flop to a JK flip flop.
b. Discuss weighted resistor D/A converter.
a. Design a synchronous mod – 6counter.
b. Realize the expression
F(a,b,c,d) = Ʃm(0,2,3,6,8,9,12,14) using a 8:1 multiplexer and an inverter
a. Design a parity generator to generate an odd parity bit for a 4-bit word(Use minimum number of gates)
b. Define a Register. Construct a shift register form RS flip-flops and explain their operation.
punjabtechnicaluniversity.blogspot.in Roll No......................... ... Total No. of Questions : 07] ...
Roll No……….. Total No. of Questions: 07 B.Com. (Sem.-1 st ) FINANCIAL ACCOUNTING Subject Code: BCOP-101 Paper ID: [B1101] ...
punjabtechnicaluniversity.blogspot.in Click Here for Syllabus of B-Tech 1st Year . http://ptu.ac.in/userfiles/file/engg_syllab/1st_and_...
Business Organisation and Management, Question Paper of B.Com 1st Semester,Download Previous Years Question Paper 2Roll No…….. Total No. of Questions: 07 B.Com (Sem.-1 st ) BUSINESS ORGANIATION AND MANAGEMENT Subject Code: BCOP-102 (2011 &a...
Roll No……. Total No. of Questions:07 B.COM (Sem.-1 st ) BUSINESS MATHEMATICS SUBJECT CODE: BCOP-104 (2011 Batch) PAPER ID: ...
punjabtechnicaluniversity.blogspot.in Roll No. ...................... Total No. of Questions : 13] ...
punjabtechnicaluniversity.blogspot.in Master Of Technology (M-Tech) Syllabus SYLLABUS FOR MASTER OF TECHNOLOGY (M-Tech) Br...
punjabtechnicaluniversity.blogspot.in Click Downlink for Dowload of Scheme and Syllabus of B.Com. Professional Batch 2011onwards ht...
B.Sc. IT (402) (S05) / 102 (New) (Sem. - 4th) BASIC MATHEMATICS – I, Punjab Technical University, PTU, Question paperpunjabtechnicaluniversity.blogspot.in Roll No. ................. Total No. of Questions : 13] ...
punjabtechnicaluniversity.blogspot.in Roll No . ............ Total No. of Questions : 07) ...