Electronic – Uses for gate expressions, Nor and Xor

logic-gates

I'm not generally confused by Electronic Engineering, but Nor and Xor are the Gate expressions that like to break that Rule.
I can't find proper answers to this question, as they are either:
Too Complex. Or too Uninformative.

No and Yes, I and O are quite simple, but i stumbled across the two extra expressions I've never heard of, Nor and Xor.
I'm quite new to this kind of stuff, so Nor and Xor are also new, and quite confusing.
Some clarification on the uses of Nor and Xor would be appreciated.

Best Answer

Truth tables:

NOR (NOT-OR) is more or less like NAND:

0 NOR 0 = NOT(0 OR 0) = NOT(0) = 1
0 NOR 1 = NOT(0 OR 1) = NOT(1) = 0
1 NOR 0 = NOT(1 OR 0) = NOT(1) = 0
1 NOR 1 = NOT(1 OR 1) = NOT(1) = 0

XOR emits 1 when the two inputs differ. You can consider this as binary addition without carry.

A XOR B = (NOT(A) AND B) OR (A AND NOT(B))

0 XOR 0 = 0
0 XOR 1 = 1
1 XOR 0 = 1
1 XOR 1 = 0
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