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Analog and Digital Electronics Question Paper - Jun 18 - Computer Science (Semester 3) - Visveswaraya Technological University (VTU)
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Analog and Digital Electronics - Jun 18
Computer Science (Semester 3)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
What is MOSFET? Name its types. Explain the construction of n-channel E-MOSFET.
(6 marks)
00
1.b.
Compare JFET and MOSFET.
(5 marks)
00
1.c.
Explain self-bias circuit for JFET.
(5 marks)
00
OR
2.a.
Define : i) CMRR ii)Slew rate iii) PSRR iv)Bandwidth pertaining to OPAMP.
(6 marks)
00
2.b.
Explain with schematics operation of relaxation oscillator with relevant wavefroms.
(5 marks)
00
2.c.
What are active filters? Explain active low pass filter.
(5 marks)
00
3.a.
Using Q-M method , simply the expression $f(A, B, C, D)=\Sigma(0,3,5,6,7,11,14)$.
(6 marks)
00
3.b.
Explain about positive and negative logic prove that positive 'OR' is equal to negative 'AND'.
(5 marks)
00
3.c.
What are Hazards ? Briefly describe about designing Hazard free circuits.
(5 marks)
00
OR
4.a.
Give Sum-Of-Product (SOP) and Product-Of-Sum (POS) circuit for $f(A, B, C, D)=\sum m(6,8,9,10,11,12,13,14,15)$.
(6 marks)
00
4.b.
Explain the verilog program structure.
(5 marks)
00
4.c.
Design a logic circuit to provide an output when any two or three of four switches are closed.
(5 marks)
00
5.a.
Implement the following Boolean function using 4:1 multiplexer $F(A, B, C, D)=\sum m(0,1$,$2,4,6,9,12,14 )$.
(6 marks)
00
5.b.
Construct 16:1 multiplexer using 4:1 and 2:1 multiplexer.
(5 marks)
00
5.c.
What is a decoder? Give the circuit for 3:8 decoder.
(5 marks)
00
OR
6.a.
What is a magnitude comparator? Explain a 1- bit comparator woth truth table and circuit diagram.
(6 marks)
00
6.b.
Briefly explain about parity generators and checkers . For a 3 bit message ,give the expression for even parity bit.
(5 marks)
00
6.c.
Compare and contrast PLA and PAL.
(5 marks)
00
7.a.
Explain the working of JK master slave flip-flop wiith a sketch, truth table and symbol.
(6 marks)
00
7.b.
Give a brief account an flip flop as finite state machine.
(5 marks)
00
7.c.
Briefly describe about sequential logic current.
(5 marks)
00
OR
8.a.
Enumerate different types of shift registers Explain Serial In Serial out (SISO) register.
(6 marks)
00
8.b.
Mention the applicators of shift registers.
(5 marks)
00
8.c.
Using behavioral model write verilog HDI code for a D flip flop with reset input.
(5 marks)
00
9.a.
Explain digital clock with block diagram .
(6 marks)
00
9.b.
Design a 3 bit synchronous binary counter using JK flip flop.
(5 marks)
00
9.c.
Mention different types of A/D converters and test its specifications.
(5 marks)
00
OR
10.a.
Explain binary weighted resistor D/A converter. Mention its drawbacks.
(6 marks)
00
10.b.
Describe about successive approximation type ADC.
(5 marks)
00
10.c.
What is the resolution of a 12 bit D/A converter which uses a bianry ladder , if the full scale output is +10V?
(5 marks)
00
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