B.Tech. 3rd Semester,5001
DIGITAL ELECTRONICS
Max Marks 60
Note:- This paper consist of three Sections Section A is compulsory. Do any Four questions from Secion B and any two questions from Section C.
Section-A Marks:20
(10 *2 =20)
1.(a) Application of ASCII ,Excess-3 and grey codes.
(b) Differentiate between combinational and sequential circuits.
(c) the advantages of edge triggered flip-flops
(d) How subtraction of 4-bit no. is performed by addition?
(e) If two inputs are to be used for a 4 input NAND gate, discuss the options avalable with the unused inputs.
(f) A/D accuracy and resolution
(g) Fan in, Fan out, propagation relay terms related to logic gates.
(h) Special features of content addressable memories.
(i) Advantages and disadvantages of synchronous over asynchronous counters.
(j) Conversion of 100.55(10) into binary, octal codes.
Section-B Marks : 5 Each
(5 * 4=20)
2. Draw the circuit of a 3 to 8 decoder and explain its operation. How this can be used as a DEMUX.
3. Find the complement of the boolean function and reduce it to a minimum number of literals :
B'D+A'BC'+ACD+A'BC.
4. Draw the circuit of a negative edge triggered J-K flip flop with d.c. pre-set and d.c. clear options using S-R flip flops
and explin its truth table.
5. Draw and discuss the circuit of a dual scope A/D convertor.
6. Draw the circuit of a 3- input TTL totem pole NAND gate and explain its operation.
Section-C Marks:10 Each
(10 *2 =20)
7.(a) Mention the various A/D converters. Discus the comparison of advantages and disadvantages of each of these.
(b) Simple using Q-M method:
X(A,B,C,D)= SIGMA(0,1,2,8,10,11,14,15).
8.(a) Draw the circuit of Ecl gate and explain its operation.
(b) Discuss the comparison of the important characteristics of the various IC logic families.
9.(a) Draw the circuit of a BJT RAM cell and explain its operation
(b) Draw the circuit of a 4-bit shift register and explain its operation.
DIGITAL ELECTRONICS
Max Marks 60
Note:- This paper consist of three Sections Section A is compulsory. Do any Four questions from Secion B and any two questions from Section C.
Section-A Marks:20
(10 *2 =20)
1.(a) Application of ASCII ,Excess-3 and grey codes.
(b) Differentiate between combinational and sequential circuits.
(c) the advantages of edge triggered flip-flops
(d) How subtraction of 4-bit no. is performed by addition?
(e) If two inputs are to be used for a 4 input NAND gate, discuss the options avalable with the unused inputs.
(f) A/D accuracy and resolution
(g) Fan in, Fan out, propagation relay terms related to logic gates.
(h) Special features of content addressable memories.
(i) Advantages and disadvantages of synchronous over asynchronous counters.
(j) Conversion of 100.55(10) into binary, octal codes.
Section-B Marks : 5 Each
(5 * 4=20)
2. Draw the circuit of a 3 to 8 decoder and explain its operation. How this can be used as a DEMUX.
3. Find the complement of the boolean function and reduce it to a minimum number of literals :
B'D+A'BC'+ACD+A'BC.
4. Draw the circuit of a negative edge triggered J-K flip flop with d.c. pre-set and d.c. clear options using S-R flip flops
and explin its truth table.
5. Draw and discuss the circuit of a dual scope A/D convertor.
6. Draw the circuit of a 3- input TTL totem pole NAND gate and explain its operation.
Section-C Marks:10 Each
(10 *2 =20)
7.(a) Mention the various A/D converters. Discus the comparison of advantages and disadvantages of each of these.
(b) Simple using Q-M method:
X(A,B,C,D)= SIGMA(0,1,2,8,10,11,14,15).
8.(a) Draw the circuit of Ecl gate and explain its operation.
(b) Discuss the comparison of the important characteristics of the various IC logic families.
9.(a) Draw the circuit of a BJT RAM cell and explain its operation
(b) Draw the circuit of a 4-bit shift register and explain its operation.
hi can i get the electrical engg 4th sem ptu last years papers.........
ReplyDeleteplz i need it
my subjects are
1. applied electronics
2.digital electronics
3.linear control system
4. instruementation engg
5.eem
6. emec and dc machines
plzzz