Sample Test Paper – I Academic Year:-

9037 Course Name Course code Semester Subject Duration

:- Computer Engineering Group :- CO/CM/IF/CD :- Third :- Digital Techniques :- 1 hours

Marks: 20

Instructions: 1. All questions are compulsory. 2. Figures to the right indicates full marks. 3. Use of non-programmable calculator is permissible. Q 1: Attempt any Two a) Define V04 (min) and IIL with respect to logic families. b) Write IC numbers for following logic gates. i) AND ii) OR iii) NOT iv)Ex-OR c) Convert the given expression in standard SOP form. Y = AC + AB + BC

(2 x 2 = 4)

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Q.2: Attempt any Two (4 X 2 = 8) a) Design logic circuit for following expression using NOR gate. _ Y = (A + B) (A + C) b) Design Full subtractor. c) Draw the logic symbol and construct the truth table for three input Ex-OR gate.

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Q. 3: Attempt any Two (4 X 2 = 8) a) Minimize the following Boolean expression basic gates. Y = ∑m (1, 3, 5, 9, 11, 13) b) Draw the block diagram, truth table, logical expression and logic diagram of 4:1 multiplexer. c) Draw the block diagram of IC 74147 (Decimal to BCD priority Encoder). Explain it with truth table.

1

Sample Test Paper – II Academic Year:-

9037 Course Name Course code Semester Subject Duration

:- Computer Engineering Group :- CO/CM/IF/CD :- Third :- Digital Techniques :- 1 hours

Marks: 20

Instructions: 1. All questions are compulsory. 2. Figures to the right indicates full marks. 3. Use of non-programmable calculator is permissible. Q 1: Attempt any Two (2 x 2 = 4) a) Why flip-flop is called as one bit memory cell? List different types of flipflops. b) Classify different types of semiconductor memories. c) List different types of ADC & DAC.

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Q 2: Attempt any Two (4 x 2 = 8) a) Draw neat diagram of J-K flip-flop using NAND gates. Describe its operation with truth-table. b) Design MOD-5 ripple counter. Draw its timing diagram. c) Draw the diagram of dual slope ADC & describe its operation.

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Q 3: Attempt any Two (4 x 2 = 8) a) Draw neat diagram of dynamic RAM cell. Describe its operation. b) Describe any four specifications of DAC. c) Draw the diagram of Parallel-In-Serial-Out shift register & describe its operation.

2

20 Marks Sample Test Paper 8.pdf

a) Design logic circuit for following expression using NOR gate. _. Y = (A + B) (A + C). b) Design Full subtractor. c) Draw the logic symbol and construct the truth ...

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