design 3 input nand gate using 2input nand gate ic 7400
Answers
Answer:
Explanation:]
With 3 NAND gates.
Use one gate with 2 inputs A and B
Another under it but common the inputs together and call them C (Ok that’s a NOT gate as correctly pointed out in the comment).
…………. IGNORE ABOVE
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Using 2 NAND gates….
Use one gate with 2 inputs A and B
the output goes to a second NAND gate,
the other input to the second NAND gate is input C
The output from that second NAND should equal 3 input NAND.
Hang on…… that's not it either, inverted input to 2nd NAND……
bear with me lol….
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EDIT 12/07/17
Since somebody recently went went to the effort of writing some code to verify this circuit I thought I'd update it with verifiable circuits myself - as it's not apparent that it works just by looking at it, or that my corrections on the fly were ‘logical’. Anyway - now if anyone is interested you can see for yourselves…. thanks. Mark.
Truth Table