Is XNOR Gate Logic Correct for More Than 2 Inputs?

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Discussion Overview

The discussion revolves around the logic of the XNOR gate when applied to more than two inputs. Participants explore whether the characterization of XNOR as an "even function of 0's" is accurate and seek clarification on its behavior in this context.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant expresses confusion about the logic of XNOR gates for more than two inputs and questions if it can be considered an "even function of 0's."
  • Another participant references an external source but doubts its correctness regarding the XNOR logic.
  • A different participant proposes that the generalization of the XOR gate is the Parity function, which outputs 1 for an odd number of "1" inputs, while XNOR outputs 1 for an even number of "1" inputs, suggesting a formulation involving NOT and XOR operations.
  • A follow-up question arises about whether this means XNOR is an even function of "1's."

Areas of Agreement / Disagreement

Participants do not reach a consensus on the characterization of XNOR logic for multiple inputs, and multiple competing views remain regarding its definition and behavior.

Contextual Notes

The discussion includes assumptions about the definitions of "even function" and the behavior of logical gates, which may not be universally agreed upon. There are also unresolved questions about the implications of the proposed formulations.

fcbarcelona
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hi,,
i m a bit confused in XNOR gate logic for MORE THAN 2 INPUTS..
is this logic correct "even function of 0's"..
need help in this regard,thanks in advance.. :confused:
 
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I don't think they found the right answer there.

The generalization of an XOR gate is the Parity - it is 1 if there is an odd number of "1" inputs.
XNOR is an inversed XOR - it is 1 if there is an even number of "1" inputs.

It can be written as NOT(A XOR B XOR C XOR D) - and as interesting feature, the order of operations (and inputs) does not matter.
 
so it is even function of 1's... ??
 

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