Talk:Multiplexer

message: My understanding of the word "multiplexor" was that it was derived from "multiple" and "xor", hence it should be spelt "multiplexor" rather than "multiplexer".  It seems that every article in Wikipedia on multiplexing is either spelt incorrectly, or I'm completely wrong.  Any comments?  mgwalker Nov 7, 2006.
:: Actually, it seems  wiktionary agrees, labelling "multiplexer" as a "variant spelling of multiplexor".   Encarta on the other hand considers "multiplexor" as "another spelling of multiplexer" (but then who trusts Microsoft to get anything right?).  The Oxford English Dictionary claims "multiplexor" pre-dates the use of "multiplexer"  (the first usage examples differ by 4 years).  Is it appropriate to comment in the article on the spelling of this word?    mgwalker Nov 7, 2006.
::: You might be right on the multiple-xor part. But most major institutes and books follow the spelling 'multiplexer', based on the word 'multiplex'. If you take a look at the page of definitions offered by Google, This page you'll find that the meaning of the word 'multiplex' closely matches with what we're trying to put forward in the article. Either way, 'multiplexer' is the more commonly used out of the two. Also, even if someone searched for 'multiplexor', we could hitch a redirect to handle that.
I vote we let the article be as is. Xcentaur 16:16, 7 November 2006 (UTC)
thread_title:  Spelling 

message: The concept of an N x M Multiplexer came up in one of the other articles (Nonblocking Minimal Spanning Switch).  Should it be added here or made a separate page?  If it is made a separate page what shoul;d it be titled? RJFJR 22:35, 2 October 2005 (UTC)
thread_title:  N x M Multiplexer 

message: i hate it when people use unnecessary ascii art.
we have tables and TeX for this junk
::I tried making a table from it, it doesn't look as good as the old ascii art one, so i junked it. I dunno if TeX would work for that either. It looks to me as if a picture is the only alternative. The ascii art in this case works decntly well. Fresheneesz 04:29, 27 March 2006 (UTC)
replies: text: Seems to me if you have a problem how the art is done, n think there's a better way, then you should make it yourself and submit it as an alternative. Ark-N-Jel (talk) 07:11, 11 February 2013 (UTC)
thread_title:  ascii art 

message: Given a specific MUX, is there a systematic way to interpret the output? For example, in a 2:1 MUX, with first input being 1 and second input being 0, and the first sel being a, and second sel being b - is there a way to determine a single output solution? Fresheneesz 09:51, 10 March 2006 (UTC)
replies: text: Yes, and its based on the conventional order of variables in a truth table. This page should show that the inputs are "input 1" at the top, and increase sequentially downward (in the pictoral representation), and that if "sel" = 1, the mux chooses "input 1", if "sel" = 410 = 1002 then the mux chooses "input 4" etc. Fresheneesz 10:38, 15 April 2006 (UTC)
thread_title: Reading muxs

message: There should be a pic and eqn for a general mux. The eqn is Out = \sum_{k=0}^{2^n-1} m_k I_k  and this corresponds with a 2^n to 1 mux. Fresheneesz 21:51, 15 April 2006 (UTC)
thread_title: general mux

message: is there 128 bit multiplexer available in the market??????  if so please tell me (santhanakrishnan_1985@yaho.com)
: I assume you mean a 128-to-1?  A bit in this context doesn't mean much to me as a bit requires some sort of time or spatial bounds of a logic high to make sense.  A multiplexer doesn't even have a clock.  Anyway, there is not a 128 input multiplexer that I am aware of.
: You could "easily" make one with eight 16-to-1 and an 8-to-1.  Put the selector pins for the eight 16-ot-1's in parallel and the last three selector pins to the 8-to-1 with the output of the eight 16-to-1's into the 8-to-1.  What you lose in this is an increase in propagation time therefore a reduction in maximum operating frequency, not to mention you're talking 9 multiplexers but you are wanting something rather extraordinary. Cburnett 03:46, 12 November 2006 (UTC)
thread_title:  128 bit multiplexer 

message: One solution is to add an enable input to a MUX. When the enable is active, the output is selected from one of the inputs. When the enable is not active, then the output is Z. (From a link in Tri-state_buffer)
Does the enable line always cause high Z outputs? If not, what use is it?
::not really. enable input is primarily to decide whether or not you want the mux function at that time. meaning, you can disable the mux as required. this has applications in 'cascading' multiplexers, like making a 8:1 from two 4:1 mux. I was going to add this to the article, but i've had exams...... once they get over, ill add that section asap 8) -Xcentaur 15:20, 13 November 2006 (UTC)
thread_title:  Enable signal effect 

message: Shouldn't the truth table headings be S A B Z rather than S A B C to correspond to the equations in the paragraph. Cgantz2000 00:56, 2 January 2007 (UTC)
thread_title:  Truth Table Heading 

message: In many books, the symbol for a demux looks exactly the same as a mux, except it is rotated by 180 degrees.  Meaning, the narrow end of the symbol always has 1 terminal and the wide end has 2 or more terminals.  On this wikipedia page it, it always treats the narrow end as an output for both symbols.  Is there some sort of standard demux symbol? —The preceding unsigned comment was added by 69.64.217.18 (talk • contribs).
:I've only seen what you describe and I agree that
::
:is backwards.  I shall add making an SVG demux on my list. Cburnett 16:02, 2 February 2007 (UTC)
thread_title:  Electronic Component Symbols 

message: The current line reads "A straightforward realization of this 2-to-1 multiplexer would need 2 AND gates, 2 OR gates, and a NOT gate."  Shouldn't it be 2 AND, 1 OR, and 1 NOT?  I don't see where the second OR gate would be used...
Sorry I'm not logged on my bad but its CPrussin  —Preceding unsigned comment added by 68.57.66.15 (talk) 23:09, 1 March 2008 (UTC)
replies: text: Yes.  Cburnett (talk) 23:17, 1 March 2008 (UTC)
thread_title:  Digital Multiplexors: 2-to-1 Multiplexor 

message: A merge was suggested between Multiplexing (which today only is about telecommunication aspects of the word) and Multiplexer (today mainly about electronics and signal processing aspects, but with a few words about communications).
*Against, since it is good to have one article mainly on telecommunications and one on electronics/signal processing. But I can accept to rename Multiplexer to Multiplexing (electronics) (with alias Multiplexer (electronics)), and Multiplexing to Multiplexing (telecommunications) (with alias Multiplexer (telecommunications)). Mange01 (talk) 17:56, 16 April 2008 (UTC)
thread_title:  Merger proposal 

message: Any comments on my rename proposal above? 
* I can accept to rename Multiplexer to Multiplexing (electronics) (with alias Multiplexer (electronics)), and Multiplexing to Multiplexing (telecommunications) (with alias Multiplexer (telecommunications)). Mange01 (talk) 19:31, 21 September 2008 (UTC)
replies: text: Could potentially be useful for some of the pages in the see also section to be put into a disambiguation page... -- Highwind888, the Fuko Master 05:42, 16 October 2008 (UTC)

text: Yes, you have to write that when creating a link to the page, but you can use a pipe to make it appear to the reader as just multiplexing (or whatever you want).--catslash (talk) 18:36, 29 August 2009 (UTC)
thread_title: Rename proposal

message: Shouldn't the definition include multiple output multiplexers?  Shouldn't there be a section with an example, perhaps of a 4X2 multiplexer?
fogus (talk) 00:34, 4 December 2008 (UTC)
replies: text: Well, first I'd assume you have a few sources with material to abstract from. Tedickey (talk) 00:54, 4 December 2008 (UTC)
thread_title:  Multiple Output Multiplexers 

message: Aren't multiplexers used in karaoke to remove lead vocals?  This article needs a Practical Purposes section to describe what they are used for.174.92.44.54 (talk) 18:53, 7 February 2010 (UTC)
replies: text: Sounds more like a "popular culture" item.  The topic does tell what they're used for. Tedickey (talk) 19:11, 7 February 2010 (UTC)
thread_title:  Practical Purposes 

message: :Now it is asking if one were to do it via a multipxer for Jd and Kd thru Ja and Ka and each gerated by using a multiplexer that is a 8 to 1 line multiplexer for each J and K controll.  it says to write down the 8 input lines of each multiplxer, including alternatives.  It says the least significant address lines is the ones and is connected to Qa and the most significant the fours, adress line is for each multiplexer is Qc.  It states that Qb is connected to the twos adress lines in each case.  
please helpDoorknob747 (talk) 16:29, 25 March 2015 (UTC)
thread_title:  help 

message: Prior content in this  duplicated one or more previously published sources. The material was copied from: https://books.google.com/books?id=Ljsr7UA83ScC&pg=PA280&lpg=PA280#v=onepage&q&f=false. Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.)
For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, and, if allowed under fair use, may copy sentences and phrases, provided they are included in quotation marks and referenced properly. The material may also be rewritten, providing it does not infringe on the copyright of the original or plagiarize from that source. Therefore, such paraphrased portions must provide their source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you.  Jeh (talk) 09:39, 5 March 2016 (UTC)
thread_title:  Copyright problem removed 

message: The logic given for the 2-to-1 mux is mathematically correct. However, a direct implementation with physical gates would encounter the problem that S and S̅ can change at different times due to delay across the NOT gate. If S changes from TRUE to FALSE while A and B are both TRUE, a FALSE glitch can occur at the output. It's not necessary to go into the details in the article, but I have added a note. 24.7.14.87 (talk) 07:27, 13 May 2016 (UTC)
thread_title: Watch out for race condition

message: What is the "S. No." column in these tables? An IP recently changed them to be sequential, but they've been non-sequential for a long time. I reverted, not because I know what the column means, but mostly because the IP has made no constructive edits and a few non-constructive ones. But this column should either be explained in the article or removed. I wonder if it is a "schematic number" copied from some document (but we don't have that set of schematics here)? Jeh (talk) 10:31, 20 March 2017 (UTC)
replies: text: I'm surprised we don't have all the part numbers, complete with different temperature ranges, rad-hard and dice versions, and from every manufacturer...after all, isn't this the Wikipartscataloginsteadofanenecyclopedia? I have blown away the baffling column.  I'd like to blow away the open-collector CMOS part, because CMOS parts don't have collectors, but lord knows this is the only source of information some people have and it would be cruel to deny them this critical knowledge. Wtshymanski (talk) 18:15, 24 May 2017 (UTC)
thread_title:  IC tables 

message: A user has recently added a section on the "Unconventional use of Multiplexers for arithmetic" (https://en.wikipedia.org/w/index.php?title=Multiplexer&oldid=1213981153#Unconventional_use_of_Multiplexers_for_arithmetic), which cites a very recent paper on the topic (the paper was 12 days old at the time of the edit). I suspect that the user who added the section is one of the authors of that paper, so it might've been added for publicity reasons.
I'm unsure whether this section should really be in this article. Since I'm not a frequent Wikipedia contributor, I'd be happy if someone else more experienced could chime in. If others believe that the section should stay, it will need a bit of an overhaul to correct grammatical errors. 2003:E7:7701:F634:2885:A1C1:AE36:E0F3 (talk) 12:09, 18 March 2024 (UTC)
replies: text: I don't think there should be an entire section devoted to the stochastic computing.  I suspect there are other unconventional uses of multiplexers, so maybe having a section "Unconventional uses of Multiplexers" is ok, but maybe just have a single sentence (or a single bullet in a bullet list) mentioning its use in stochastic computing with a citation, and then leave the details out of this Wikipedia article so curious readers can read the cited paper for details. Em3rgent0rdr (talk) 22:10, 18 March 2024 (UTC)
thread_title:  Multiplexers for arithmetic section