Exam Details
| Subject | digital electronics and logic design (ee) | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Government Degree College, Kamalpur | |
| Position | ||
| Exam Date | April, 2018 | |
| City, State | tripura, dhalai |
Question Paper
C 4809 Pages: 2
Page 1 of 2
Reg
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018
Course Code: EE204
Course Name: DIGITAL ELECTRONICS AND LOGIC DESIGN
Max. Marks: 100 Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks Marks
1 Convert the following binary number into its equivalent gray code:
11010101
Convert the following gray code into its binary: 10101110
Perform the following arithmetic operation using complement
representation: 58 34
2 Sensors are used to monitor the pressure and temperature of a chemical solution
stored in a tank. The circuitry for each sensor produces a high voltage when a
specified maximum value is exceeded. An alarm requiring a low voltage input
must be activated when either the pressure or temperature is excessive. Design a
circuit for this application.
3 Draw the circuit of a full adder and explain.
4 Distinguish between Sequential and combinational circuits.
5 Explain the design procedure of a synchronous counter without lock out.
6 Differentiate Moore and Mealy machines. Explain with examples.
7 Give the basic operation of a successive approximation ADC
8 Compare PAL, PLA and FPGA.
PART B
Answer any two questions, each carries 10 marks
9 Find the standard sum of products for the logic expression:
F
AB AB BCD
Use K-map to minimize the expression:
F m 10, 12, 13, 14, 15)
10 Design a three-bit odd parity detector circuit.
Design the logic circuit for a BCD to decimal decoder.
11 Draw a neat diagram of TTL NAND gate and explain its operation. What is
meant by sourcing and sinking?
PART C
Answer any two questions, each carries 10 marks
12 Explain the operation of a Master slave JK flip-flop. What is meant by race
around condition?
13 Design a mod-11 asynchronous counter using T flip flops and discuss its
disadvantages.
C 4809 Pages: 2
Page 2 of 2
14 Design a 4 bit Carry look ahead adder.
PART D
Answer any two questions, each carries 10 marks
15 Design a counter to a given count sequence using T Flip flops
1,.......
16 Design a Flash type 2-bit ADC. What is the difficulty in designing ADCs of
higher order bits?
17 Implement a half adder using VHDL.
Prepare the state table and excitation table for the Sequential machine shown
below. Use T flip flop.
Page 1 of 2
Reg
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018
Course Code: EE204
Course Name: DIGITAL ELECTRONICS AND LOGIC DESIGN
Max. Marks: 100 Duration: 3 Hours
PART A
Answer all questions, each carries 5 marks Marks
1 Convert the following binary number into its equivalent gray code:
11010101
Convert the following gray code into its binary: 10101110
Perform the following arithmetic operation using complement
representation: 58 34
2 Sensors are used to monitor the pressure and temperature of a chemical solution
stored in a tank. The circuitry for each sensor produces a high voltage when a
specified maximum value is exceeded. An alarm requiring a low voltage input
must be activated when either the pressure or temperature is excessive. Design a
circuit for this application.
3 Draw the circuit of a full adder and explain.
4 Distinguish between Sequential and combinational circuits.
5 Explain the design procedure of a synchronous counter without lock out.
6 Differentiate Moore and Mealy machines. Explain with examples.
7 Give the basic operation of a successive approximation ADC
8 Compare PAL, PLA and FPGA.
PART B
Answer any two questions, each carries 10 marks
9 Find the standard sum of products for the logic expression:
F
AB AB BCD
Use K-map to minimize the expression:
F m 10, 12, 13, 14, 15)
10 Design a three-bit odd parity detector circuit.
Design the logic circuit for a BCD to decimal decoder.
11 Draw a neat diagram of TTL NAND gate and explain its operation. What is
meant by sourcing and sinking?
PART C
Answer any two questions, each carries 10 marks
12 Explain the operation of a Master slave JK flip-flop. What is meant by race
around condition?
13 Design a mod-11 asynchronous counter using T flip flops and discuss its
disadvantages.
C 4809 Pages: 2
Page 2 of 2
14 Design a 4 bit Carry look ahead adder.
PART D
Answer any two questions, each carries 10 marks
15 Design a counter to a given count sequence using T Flip flops
1,.......
16 Design a Flash type 2-bit ADC. What is the difficulty in designing ADCs of
higher order bits?
17 Implement a half adder using VHDL.
Prepare the state table and excitation table for the Sequential machine shown
below. Use T flip flop.
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- basics of mechanical engineering
- circuits and networks (ee)
- computer aided design and analysis (ma, me, mp, pe)
- computer programming (ee)
- dc machines and transformers (ee)
- digital electronics and logic design (ee)
- dynamics of machinery (me, mp, au, pe)
- fluid mechanics and machinery
- heat and mass transfer (ma, me, au)
- machine design (pe)
- machine tools and digital manufacturing (ie, me)
- manufacturing technology
- manufacturing technology (ie, me, ma)
- material science (ee)
- measurements and instrumentation (ee)
- mechanics of machinery (me, mp, pe)
- mechanics of solids (me,mp,ma,mt,au,pe,sf)
- mechanics of solids(au, ma, me, mp, mt, pe, sf)
- metallurgy and materials engineering(mc, mp, ma, me, pe)
- metrology and instrumentation (me, mp, pe)
- synchronous and induction machines (ee)