Nand Gate
What happens if you short the input terminals of a NAND Gate?
I saw a schematic where the inputs are shorted and a signal is coming in. Is there any purpose to this?
Thanks.
-Art
Ok, you have the function a NAND b = x
a , b | x
0 . 0 . 1
0 . 1 . 1
1 . 0 . 1
1 . 1 . 0
When you connect the two inputs to the same source, you have the situation that a = b. From the truth table, there are two such cases (#1, #4). What this implies is that when a = b, the function simply produces the result NOT A.
In practise, this means you can use a NAND gate as a NOT gate (infact, you can build all the logic gates out of just NAND gates – same goes for NOR gates).
The inputs aren’t being shorted, though, since both “inputs” are always at the same potential – be it “high” or “low”.
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