Need help understanding nand gates

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nyasha

Joined Mar 23, 2009
90
Guys l need your help l got a final tomorrow. What l don't understand is how did the instructor simplify the second circuit with nand gates, l mean the one with the function G


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Guys don't worry l figured it out. He used demorgan's law
 

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Engr1001

Joined Apr 15, 2009
3
I logic there are some identities

A nand B equals A/ or B/

A nand B
0 0 = 1
1 0 = 1
0 1 = 1
1 1 = 0

This truth table is the same as A/ or B/

Once you apply this to the output gate the inversions cancel each other out to yield the results desired.
 
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