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Draw the logic gate diagram for 2-input OR gate using NAND gates only. Show the expression at each Step. - Computer Science (Theory)

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Question

Draw the logic gate diagram for 2-input OR gate using NAND gates only. Show the expression at each Step.

Answer in Brief

Solution

2-input OR gate using NAND gate:

Working:

`Q = bar(barA.barB)`

`= (barA)' + (barB)'`    ...(By De Morgan's Law)

= A + B     ...(By Involution Rule)

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Elementary Logic Gates (NOT, AND, OR, NAND, NOR, XOR, XNOR) and Their Use in Circuits
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