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# 3 & 4 Input XOR/XNOR Gate

3 replies to this topic

### #1

reconrey

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• Minecraft: reconrey

Posted 19 June 2011 - 03:07 PM

Well this is a design I made for a 3 and a 4 input XOR and XNOR gate. It is just my vertical design but with more input areas. It functions the same as a regular xor/xnor gate, when the inputs do not equal the output is on (or opposite for xnor gate). I do not think that this will have to much of a practical uses...but it might, maybe more useful when pistons come out. Thanks.

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### #2

JacaByte

Posted 19 June 2011 - 03:31 PM

This isn't a true XOR/XNOR gate, because by typical standards and conventions an XOR gate outputs a 1 when the number of inputs that are 1 is odd; yours is true even when the number of true inputs is even. The opposite is true of XNOR gates; an XNOR gate is false when the number of inputs that are true is odd. These gates may still have uses, but it can't be used as a multi input XOR/XNOR gate.

Read this for a more thorough explanation: http://electronics.w...than_two_inputs

### #3

reconrey

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Posted 19 June 2011 - 04:57 PM

JacaByte, on 19 June 2011 - 03:31 PM, said:

This isn't a true XOR/XNOR gate, because by typical standards and conventions an XOR gate outputs a 1 when the number of inputs that are 1 is odd; yours is true even when the number of true inputs is even. The opposite is true of XNOR gates; an XNOR gate is false when the number of inputs that are true is odd. These gates may still have uses, but it can't be used as a multi input XOR/XNOR gate.

Read this for a more thorough explanation: http://electronics.w...than_two_inputs

Oh...according to the Minecraft Wiki: "A device which activates when the inputs are not equal to each other." is an xor gate. so I figured that more than 2 inputs it would still be classified as an xor gate. Thanks.

### #4

Xinhuan

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Posted 19 June 2011 - 09:09 PM

reconrey, on 19 June 2011 - 04:57 PM, said:

Oh...according to the Minecraft Wiki: "A device which activates when the inputs are not equal to each other." is an xor gate. so I figured that more than 2 inputs it would still be classified as an xor gate. Thanks.

The main idea for X-input XOR gates is that when ANY input toggles, the output also toggles. That's why odd=true and even=false.