Digital Logic And Logic Families-a4
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A universal logic gate is one which can be used to generate any logic function. Which of the following is a universal logic gate? a) OR b) AND c) XOR d) NAND
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OR
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AND
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XOR
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NAND
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Digital logic and logic families: Digital signals, combinational and sequential logic circuits, clock signals, Boolean algebra and logic gates. Integrated circuits and logic families: Logic Levels, Noise Immunity, Fan Out, Propagation Delay, TTL logic family CMOS Logic family, comparison with TTL family Flip flops: Set Reset(SR),Trigger(T), clocked F/Fs; Registers, decoders and encoders, Multiplexer and Demultiplexer, applications
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- 2.
How many NAND gates are require to implement OR gate
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2
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3
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1
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4
Correct Answer
A. 3 -
- 3.
DeMorgan’s theorem states that
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(AB)’ = A’ + B’
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(A + B)’ = A’ * B
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A’ + B’ = A’B’
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None of the Mentioned
Correct Answer
A. (AB)’ = A’ + B’ -
- 4.
How many truth table entries are necessary for a four-input circuit?
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4
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8
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12
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16
Correct Answer
A. 16 -
- 5.
In D flip-flop, D stands for
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Data
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Delay
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Both Delay and Data
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None of the Mentioned
Correct Answer
A. Both Delay and Data -
- 6.
All continuous signals are analog in nature but all analog signals can be
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Only continuous
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Continuous or discrete
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Only discrete
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Digital
Correct Answer
A. Continuous or discrete -
- 7.
Which Configuration of TTL is preferred if FAN OUT is requirement
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Standard output TTL
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Totem pole
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Open Collector TTL
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Tri state TTL
Correct Answer
A. Open Collector TTL -
- 8.
Why is a demultiplexer called a data distributor?
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The input will be distributed to one of the outputs
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One of the inputs will be selected for the output
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The output will be distributed to one of the inputs
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None of the Mentioned
Correct Answer
A. The input will be distributed to one of the outputs -
- 9.
In 1-to-4 demultiplexer, how many select lines are required?
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2
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3
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4
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5
Correct Answer
A. 2 -
- 10.
Explain : Noise Immunity
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Current Version
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Mar 21, 2022Quiz Edited by
ProProfs Editorial Team -
Mar 06, 2019Quiz Created by
Pratiksha Patil
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