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How to make this into a logic circuit?
Create a Logic Circuit that accepts input from four sources ABCD, and outputs 1 when exactly
two inputs are set to 1 and 0 for any other combination of input.
1 Answer
- SqdancefanLv 74 years ago
Here's one way to do it using 4 2-input XOR gates, 2 2-input AND gates, and a 2-input OR gate. Of course, the AND-OR network can be replaced by 3 NAND gates.
.. out = or(and(xor(A, B), xor(C, D)), and(xor(A, C), xor(B, D)))
You can also do it as with 4 inverters, a 6-input OR gate, and 6 4-input AND gates.
.. out = or(and(A, B, C', D'), and(A, B', C, D'), and(A, B', C', D), and(A', B, C, D'), and(A', B, C', D), and(A', B', C, D)) . . . . where A' = not(A), etc.
