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But how did you guys come out with this expression? I need help
a b c out a.b a.c b.c
0 0 0 0 0 0 0
0 0 1 0 0 0 0
0 1 0 0 0 0 0
0 1 1 1 0 0 1
1 0 0 0 0 0 0
1 0 1 1 0 1 0
1 1 0 1 1 0 0
1 1 1 1 1 1 1
The use of NAND gates for this comes from the observation that for negative logic (0V=logic 1, 5V=logic 0) a NAND gate becomes a NOR gate and a NOR gate becomes a NAND gate.Quite easy. I used three nand gates whose outputs are labeled AB, BC, AC. Their outputs are connected to a three input nand gate. The boolean algebra gives AB+BC+AC.
But how did you guys come out with this expression? I need help