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  • The figure shows the voltage waveforms across two inputs A and B and the output Y of a logic circuit. The logic circuit gate is: <img alt="" src="https://cdn.entrance360.com/media/uploads

The figure shows the voltage waveforms across two inputs A and B and the output Y of a logic circuit. The logic circuit gate is:

Option: 1

OR gate


Option: 2

AND gate


Option: 3

NOR gate 


Option: 4

NAND gate


Answers (1)

best_answer

The truth table of the given waveforms is as shown.

Time interval Input A Input B Output Y
\mathrm{< t_{1} } 1 1 0
\mathrm{ t_{1} \; to\; t_{2} } 0 0 1
\mathrm{ t_{2} \; to\; t_{3} } 0 1 1
\mathrm{ t_{3} \; to\; t_{4} } 1 0 1
\mathrm{ t_{4} \; to\; t_{5} } 1 1 0
\mathrm{ t_{5} \; to\; t_{6} } 0 0 1
\mathrm{> \; t_{6} } 0 1 1

As output \mathrm{\mathrm{Y}=\overline{\mathrm{A} \cdot \mathrm{B}}}

Hence the logic circuit represents NAND gate.

Posted by

Nehul

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