Talk:XNOR gate

Name

No idea what's common, but XNOR is a stupid name which implies exclusive-NOR and has no meaning. NXOR is a sensible nomenclature that clearly indicates the complement of XOR. —DIV (120.17.9.222 (talk) 08:08, 16 March 2018 (UTC))

I came across this page with exactly the same issue! An NXOR is the opposite of the XOR, where the XOR is the OR with exclusion that both arguments are true; this is also the explanation that is presented in the current first sentence of this article!! But what should be the explanation for an 'eXclusive NOT OR'? I don't know, so I have to agree with 120.17.9.222. - Bob.v.R (talk) 09:59, 22 April 2018 (UTC)

I've never heard of NXOR. The gate is called XNOR because it is a NOR gate with an added twist. With NOR, if either or both inputs is 1, the output is 0. With XNOR, the "exclusive" condition is added to that, so that with XNOR, the output is 0 only if exactly one input is 1. With XNOR, the "both inputs 1" condition is excluded from producing the active output, namely 0. Johnuniq (talk) 10:57, 22 April 2018 (UTC)

Welcome to the world of stupid names and stupid phrases! I suggest fixing the following before you turn your attention to XNOR:

• "Dialing" a telephone refers to something that no longer exists.
• The icons on your desktop for a phone and a floppy disk refer to things that no longer exist.
• Serifs exist to make it easier for the Romans to carve letters into stone.
• A surplus of electrons is called "negative", while a shortage of them is called "positive".
• The word "telegraph" can't be right, because there are multple places called "telegraph hill" that were named long before Morse's invention.
• The "Hundred Years War" lasted 116 years.
• New Mexico was named during the 1500s. At the time the county we know of as Mexico was called Nueva Espana - New Spain. It became Mexico hundreds of years later in 1821.
• Russians celebrate the October Revolution in November.
• White rhinos are gray, pretty much the same color as black rhinos.

Let me know when you get everyone to stop using those stupid words and phases, them we can work on XNOR. :) --Guy Macon (talk) 18:57, 22 April 2018 (UTC)

Hi Johnuniq, thank you for the reply. It seems to me that the explanation for XNOR is less straightforward than the explanation for NXOR ("the logical complement of the exclusive OR (XOR) gate", as mentioned in the introduction section of the article), but it is good news that there seems to be some sort of explanation for "XNOR" at all. Bob.v.R (talk) 10:28, 24 April 2018 (UTC)

Logic Gates

Logic gates are used for Performing arithmetic mathematical calculations 39.33.174.126 (talk) 13:10, 31 January 2022 (UTC)

74x7266

The 74HC7266 is a 14-pin chip containing four 2-input XNOR gates with regular totem pole outputs, making it easier to use in most applications than the '266. 87.75.117.183 (talk) 08:01, 28 April 2023 (UTC)

XAND

@TennisFans: I can't easily find a RS naming "XAND" as a synonym of XNOR, but Wiktionary does say it's rare. Perhaps it shouldn't be in the lead, but I don't think it should be completely removed from the article, or that it's a wrong name (as you said). jlwoodwa (talk) 00:09, 27 July 2023 (UTC)

If there are multiple reliable sources using this term, the article can mention it. Assuming nothing has changed since I last looked, XAND is not supported and is not WP:DUE. Johnuniq (talk) 03:51, 27 July 2023 (UTC)

XAND, i.e., "exclusive and", is a binary connective assigning (1,1) and others to 0, and so is the binary falsehood which is of course not a synonym or name of XNOR. Therefore, it's not necessary to introduce such a term at all. Note that, "exclusive" has the effect on the value of (1,1) in the following way: if the original connective A assigns (1,1) to 1, then "exclusive A" assigns (1,1) to 0; if the original connective A assigns (1,1) to 0, then "exclusive A" assigns (1,1) to 1. And note that, "exclusive" has no effect on the values of (1,0), (0,1) and (0,0). The interpretations agree with the "exclusive" in the "exclusive or" (XOR) and "exclusive nor" (XNOR).TennisFans (talk) 04:11, 27 July 2023 (UTC)

Building XNOR with 3 gates

An XNOR can be built with another set of 3 gates. In the article, the following drawing is shown https://en.wikipedia.org/wiki/File:3_gate_XNOR.svg

It can be implemented with 2 NAND gates and 1 OR gate, per https://www.righto.com/2023/12/386-xor-circuits.html

• A and B inputs are routed through a 2in-NAND out to C.
• A and B inputs are routed through a 2in-OR out to D.
• C and D intermediate outpus are routed through a 2in-NAND out to Y (final output).

• Sbmeirow • Talk • 01:58, 18 December 2023 (UTC)