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Could anyone say how do you say in english the phrase corresponding to the ratio of temperature to voltage for a given junction and/or diode? I want to make a bulgarian article with translation of this phrase. I am talking about the positive and negative coefficient/ratio of temperature to voltage for some semiconductor elements. Also how do you call a backward way of the current? When it is used for testing for example on a given circuit you put + to ground and - to + at the source of voltage/current I think. Please also answer on my private discussion page :).-- Leonardo Da Vinci ( talk) 19:12, 25 March 2011 (UTC)
Yes but for ""temperature coefficient" of the diode voltage" maybe you mean only for diodes? The exact voltage is dependant on the temperature. Increasing temperature increases the current/voltage flow in a given electrical device. So this event must have some specific phrase to call it. Something like TCV - Temperature Coefficient of Voltage or something you know ;). It also can be positive and negative depending on the working voltage and diode ;). — Preceding unsigned comment added by Leonardo Da Vinci ( talk • contribs) 14:53, 26 March 2011 (UTC)
Does anyone know which type of symbol (DIN 6779 / ISO / IEC / ...) the displayed symbol in the article is? it would be nice to add the comment there...
_i_ ^ / \ --- |
Does anyone know how a diode prevents current from flowing in one direction but permits it in the other?
In a vacuum diode, the materials of the anode and cathode have different attraction to keep their electrons, the cathode may be pointed to concentrate the electric field and the cathode is usually heated to "boil" off electons. The anode is called the "plate" because it is flat to spread out the field so it is not anywhere strong enough to pull out electrons. Sorry not to include links. I can help find more detail if needed. David R. Ingham 04:44, 7 January 2006 (UTC)
Does the use of galena as a detector (referred to in semiconductor devices) predate the vacuum tube rectifier? - David M
I thought I'd just explain why I changed "current" to "charge". Current doesn't really flow from A to B, but charge does. Just like "water flow rate" doesn't flow anywhere, but the water itself does. -- User:Dgrant
It was I who changed "charge" back to "current", but in the light of the comments above, I decided that my version was no more or less correct than the previous one. Now, in an effort to please everybody, I have expanded the definition to mention both charge and current.
I think that the question of whether current "flows" or just "is" is merely a question of style. At worst, I think that "current flows" is harmlessly redundant. -- Heron
As this is the general 'diode' article, it seems to me that the section on rectification schemes can be moved into rectifier, and the discussion of p-n diode characteristics can be cut down and handled on p-n junction instead. Any thoughts? - mak o 05:45, 10 July 2005 (UTC)
Yes, I agree this article is getting confused between rectifier and diode descriptions. After all, many diodes are not in fact used as rectifiers at all. Rectifiers should IMHO be moved to the rectifier article. Alan
I had not heard of this device before. Does it exist? Can anyone refer to an example part or manufacturer or example of useage?? Al
Gas Discharge Diode : There are two electrodes, not touching, in some kind of gas. One electrode is very sharp. The other has a smoothly curved finish. If a strong negative potential is applied to the sharp electrode, the electric field near the sharp edge or point is enough to cause an electrical discharge in the gas, free carriers are created, and a low resistance path appears. If the reverse potential is applied, the electrical field strength around the smooth electrode is not enough to start a discharge. (The discharge can only start easily at the negative end because electrons are much more mobile than positive ions.) These are sometimes used for high-voltage high-current rectification in power supply applications.
There are no V-I curves for the different diodes. Perhaps one for the "normal" or rectifier P-N diode and one for the zener/avalanche diodes would be helpful. If there's consensus, I will create the images and insert them into the articles - unless the images have already been created and excluded for some reason. Rohitbd 12:59, 27 September 2005 (UTC)
Since no one has objected, I have added the image to the article. Rohitbd 10:08, 5 October 2005 (UTC)
The IV curve shown looks pretty symmetric. Forgive my ignorance, I guess this may be true for some types of diode, but the whole point of using a rectifying diode is that the characteristic isn't symmetric. More asymmetry would also help to more clearly identify forward and reverse bias etc... Michi zh ( talk) 09:49, 22 July 2011 (UTC)
Suggestions to add to the I-V plot: Get rid of the kink at V=0. Compare ideal with nonideal diodes. Draw it to scale, with an inset to zoom in to show the (tiny!) reverse bias leakage current and the line passing through the origin (I=0 at V=0). I'll add these if I get time, otherwise please Be Bold. Mwistey ( talk) 06:04, 14 November 2011 (UTC)
I like the suggestions by talk, but since Nov. 2011 no one implemented them! Here is my contribution: I prepared a SVG figure with the Shockley equation and some realistic parameters.
Shall we replace Fig. 5 in the article? Hldsc ( talk) 18:19, 9 July 2013 (UTC)
In Zenear diode Avalanche breakdown happen with respect to increase of I amps. Here I am assuming I amps and V volts is in a Bijection function. It means diode couldn't tolerate the I amps which is raised or given in period of time. In that time several spike and surges happens so or while it might that Avalanche happens so. Now lets revisit the Graph, instead of taking I amps units in Y-axis and V volts in X-axis. Lets take the time alone in anyone of the axis, say in Y. Then the way Zenear diode function is can be said as f(x), like a share market graph. When it is plotted f(x) reveals several truths. That can be analyzed in several Metrics and many assertive truthful abstract can be get to known by the fact. NOW say Avalache starts freaks out. F(X) becomes collateral. But assume we formed the powerful Zenear as is so. So f(x) still in assertive metrics. So finally the function T is impacted by some ev (Electron Volt). Now think in such a way that this Zenear Diode is formed for this functionality only. That means the impact say ΔT happens within Zenear. So VLSI and connected systems is as powerful as LHC So, hence this ΔT can impact T.
F(X) == T + ΔT => F(X) == dt.
It reveals, it is just that there exists and can be x=f(y) by holding and reversing
Bijection in virtual or in realistic way. Lets form the powerful circuits.–
Dev Anand Sadasivam
t@lk 11:52, 11 June 2015 (UTC)
i love how the list of diode types is in a completely random order. the descriptions are fine, but it's impossible to quickly find the desired entry. typical "missing the forest for the trees" behavior from wikipedians.
I don't understand the paragraph concerning gold-dopped diodes: gold is supposed to make the diodes operating faster, but the paragraphs ends on the topic of main rectification (i.e very slow operation). Also, it is said that gold-dopped diodes can operate at "signal" speed. Does that mean "high frequency signal"? CyrilB 13:24, 6 March 2006 (UTC)
Is it planed or hoped that gasious state devices will be described here. David R. Ingham 04:46, 7 January 2006 (UTC)
Please stop giving Shockley more credit than deserved. He didn't invent the transistor. And, it could easily be argued he didn't invent the BJT. — Preceding unsigned comment added by 74.77.148.238 ( talk) 15:43, 8 April 2017 (UTC)
I've heard something about the equation not taking into account "photon recycling effects", which cause the equation to be very inaccurate in the case of photovoltaics. I think this would be significant enough to note on the page. Fresheneesz 21:18, 23 February 2006 (UTC)
@ 2006-06-25 13:36Z
I always thought the first diodes were point contact diodes, used in crystal sets, but the article claims the first diodes were thermionic. Any references to back the article's claim? Also, my understanding is that the symbol for a diode is actually a drawing of a point contact diode. It has nothign to do with arrows and the direction of current flow. The symbol is polarised as it is because the 'whisker' of a point contact diode is the anode and the flat plate is the cathode. The "arrow" in the diode symbol is really a sharpened needle (whisker) on a flat plate. John Dalton 11:27, 15 March 2006 (UTC)
I agree that the article needs clarifying. I will try to work on it a little. Maybe the confusion is that the first thing called a "diode" was a thermionic tube. Crystals predated vacuum tubes but they were called rectifiers. Today it would be called a Schottky barrier diode. Snafflekid 19:46, 15 March 2006 (UTC)
From the rectifier article: "the difference between the term diode and the term rectifier is merely one of usage, e.g. the term rectifier describes a diode that is being used to convert AC to DC.". The rectifer article goes on to describe the *process* of rectification with passing reference to "point contact rectifiers or crystal detectors". As a *device* crystal diodes/rectifiers seem to have "fallen through the cracks" in that the device itself is outside the scope of the rectifier article and not considered to be a diode in the diode article. Perhaps we are a victim of changing terminology? Crystal (point contact) diodes were originally named by the function they performed. At some point as rectifiers found wider application (possibly corresponding with the invention of the themionic diode??) the name of the function (rectification) and device (diode) seem to have been separated. Possibly this is why themionic diode have gottten the label of "first diodes", as they appeared around the same time as the word "diode" found wider usage? Need to find references to back up this theory! John Dalton 20:25, 15 March 2006 (UTC)
I've added a section on crystal diodes. The article is now internally inconsistent as both thermionic diodes are crystal diodes are claiming to be the first. If I get the time I'll try to fix it, but fel free to jump in before me. John Dalton 21:03, 15 March 2006 (UTC)
The saga continues. I'm not so sure crystal diodes were used before thermionic diodes now. The principle of crystal diodes was discovered in 1874. The principle of thermionic diodes was discovered in 1873. A Thermionic device was patented in 1883, but developed no further. The first practical thermionic diode was patented in 1904. Crystal diodes were in use before then. Maybe I'll just add a 'history' section to the article. John Dalton 21:24, 15 March 2006 (UTC)
By my understanding, crystal radios got their name from the crystal in the rectifier, not the quartz crystal in the earphone. John Dalton
I didn't see any reference to a needle and a razor blade?
Yes, the word crystal in the phrase "Crystal Radio" refers to the crystal used in the rectifier. - Tim —Preceding unsigned comment added by 68.249.1.76 ( talk) 17:04, 3 November 2009 (UTC)
Would anyone know the reasoning behind placing a diode across the controls of a DC low voltage relay?
There is now an article that talks about exactly this -- flyback diode. So ... should we explain this in both diode and flyback diode ? -- 75.37.227.177 15:43, 25 July 2007 (UTC)
(mostly as a reminder to myself) the section on radiation detection needs clean-up and correction. Unfortunately also the semiconductor detector article is not good, so I can't copy from there. Sergio Ballestrero 23:10, 3 May 2006 (UTC)
I made the titles of the schematic diagrams into links to their respective articles.-- 24.16.148.75 23:24, 30 June 2006 (UTC)
I have removed the obscure line:
Engr.Louriel R. Manatom
I have no idea why it was there; if somebody has an explanation, he's free to offer it. John Reid 07:36, 16 October 2006 (UTC)
I suggest this be added to the caption. It would make the illustration useful for someone trying to figure out which way a diode goes. The trouble is I'm not sure it's true - can someone who knows, check?
—The preceding unsigned comment was added by 190.56.56.246 ( talk) 13:08, 17 April 2007 (UTC).
The term "diode" does not come from "two" and "odos". The "di" is from "dia" so "diodos" is "dia-odos", the path through which something passes. On the other hand in William Eccles the story goes that Eccles invented the term Diode to describe an evacuated glass tube containing two electrodes; an anode and a cathode.. However the word doesn't have that meaning in greek, it would be nice if there was a source so we could know what Eccles was really thinking - Badseed 00:48, 27 May 2007 (UTC)
Eccles was honest enough to site the Greek roots of the word diode, only he made an understandable grammatical error, mistaking "δι-" as derived from the word for number "2". Τhe origin is INDEED the word "δίοδος" (pronounced: thEE-o-thos) which exists in the Greek dictionary since ancient times and it means "through passage". It is in fact a compound word, derived from the preposition "διά" (pronounced thee-Ah") and the noun "ὁδός" (pronounced: o-thOs) with the (weaker) vowel "α" dropped in favor of the (stronger) vowel "ο". Τhis is a common grammatical phenomenon in Greek called "elision" in English. The "δι-" is not derived therfore from the word "δύο" (pronounced:thEE-o) because the meaning of the word "δίοδος" does not mean "two paths" but the exact opposite: "One path" [only] between two points. You may consult an English-Greek or (even better) directly a Greek dictionary, if -of course- you possess a good understanding of the [Greek] language. A good starting point would be HERE. BTW, Etymology is indeed based on meaning and logic (and many other things) but not so much in history. It is defined as the study of the origin of words and the way in which their meaning and spelling have changed "throughout" history but is not "based" ON history. Thank you for your attention and you may contact me at the following address if you have any questions: R1100RA@gMail.com.
"In electronics, a diode is a two-terminal component,"
You'd expect so from the word derivation, but direct (filament heated) thermionic diodes have 3 terminals. (Similarly, direct heated triodes have 4 terminals.)
For sources for this, see any valve/tube basics text.
The term 'diode' may have originated with a 2 electrode device, but for a century or so, ie almost the entire history of the word, it has been used to describe devices that conduct one way better than the other, and of course some of these are not 2 terminal devices. Tabby ( talk) 18:20, 26 November 2007 (UTC)
==
User ( Wbm1058) does not possess a solid knowledge of the Greek language, therfore, makes a few erroneous statements. Δι- by it self does not always mean "two". It could also be a derivation from the preposition "διά" as I previously explained. The word for the number two is "δύο". Indeed the word dipole comes from the word "δίπολος" which in Greek is an adjective meaning "having two poles". The etymology is as such: Δύο+πόλος the "o" is dropped, the word becomes δύπολος and for grammatical/spelling reason that go beyond the scope of this the ypsilon "υ" is converted into a iota "i". Finally, δίπολος is the nominative (=ονομαστική) case (=πτώση) but in normal use the word appears in the accusative (=αιτιατική πτώση) e.g. "τον δίπολο" which also very similar but should not be confused with the nominative of the same adjective but in the neutral gender e.g. "το δίπολο".
Finally, Tabby, a resistor is a two terminal component also, is n't it? So is a capacitor, a battery, a rheostat, a coil, a magnet and so forth. I can think of many components with "two-terminals" which -however- are NOT a diode. E.g. having two terminals does not qualify something as a diode. It is the one-way through passage of electrons that give a diode its unique name. Again the di- in diode comes from the preposition "διά" which means (almost verbatim) "through". The di- in dipole on the other hand comes from the number two="δύο", e.g a magnet is indeed a dipole because it is characterized by the presence of TWO poles with opposite ...polarity. Again, please consult an appropriate dictionary, BEFORE you commit into writing inaccurate statements, especially about matters that you possess little or no knolwdge at all. Sincerely, R1100RA@gMail.com
This article is barely more than a stub. No mention of the 1NXXXX numbering system, used for decades as the main way of labelling diodes. No references. No See also or External links.- 69.87.199.84 12:38, 20 June 2007 (UTC)
A standardized 1N-series numbering system was introduced in the US by EIA/ JEDEC (Joint Electron Device Engineering Council) about 1960. Among the most popular in this series were: 1N34A/1N270 (Germanium signal), IN914/1N4148 (Silicon signal) and 1N4001-1N4007 (Silicon 1A power rectifier).
"The JEDEC Solid State Technology Association (Once known as the Joint Electron Device Engineering Council), is the semiconductor engineering standardization body of the Electronic Industries Alliance (EIA), a trade association that represents all areas of the electronics industry. JEDEC was originally created in 1960 as a joint activity between EIA an NEMA, to cover the standardization of discrete semiconductor devices and later expanded in 1970 to include integrated circuits." [1]
http://news.elektroda.net/introduction-dates-of-common-transistors-and-diodes-t94332.html http://semiconductormuseum.com/Museum_Index.htm - 69.87.199.84 13:34, 20 June 2007 (UTC)
There seems to be a small error in this section of the article. The author says that when an electric field is placed across the diode which has the same polarity as the "built -in" electric field, then current is allowed to flow. Assuming that the author is using the conventions of positive charge movement constituting current flow and electric field lines pointing from regions of positive charge to regions of negative then and only then does the reader know what he means when he says that current flows from the P region to the N region. P-type semiconductors are doped with group IIIa atomic elements and N-type semiconductors are doped with group Va atomic elements. On their own they consitute neutral atoms, however, when placed in the silicon lattices of a PN diode electrons move around to form these "built-in" electric fields. The author says that in order for the holes naturally existing in the P region to be filled wiht electrons, electrons must leave the N region to combine with the holes. Being group V elements in the N region, this would leave behind a net positive charge in that region. Conversly, there being group III element in the P region, having these holes filled would create a net negative charge in that region. So we have established that there then should be electric field vectors in the material pointing from the N region to the P region. Since diodes only allow current to flow in the direction of P to N however, placing an electric potential across the diode which has the opposite polarity of the "built-in" field will allow current to flow. This contradicts the statements of the author. Furthermore, you can make sense of this in your mind by thinking of the "built-in" field as a manefestation of the depletion of charge carriers at the interface as the author suggests you do. Then since this built-in field is caused by the device taking on insulating qualities, it would make sense that you should destroy these qualities to allow for conduction of charge: hence placing an electric field across the device with a polarity opposite to that of the "built-in" electric field. 24.248.230.218 16:13, 1 July 2007 (UTC)Ted Cackowski Jr.
hello this will be grate if u give a sketch sectional view of a diod with labeling and from that labeling discribing the specific usage of that part of the object(diode).-rathin dholakia(india)
I wonder if more explicit detail of current flow convention could be described. I am thinking from the perspective of "in the days" of thermionic valves, circuit nomenclature discuss current in terms of electrons (from Cathode to Anode). Its easy to depict the idea of electrons "boiling" off a heated Cathode and flying to the positive charged Anode. However when semiconductors arrived on the scene, circuit nomenclature discussion of current flow became the "conventional" current flow, and so the arrow in the diode symbol depicts the reverse of what would sensibly be the current flow (as in electrons). If someone knows and can write about the history of how this came about, I think would be most appropriate in this diode subject. If I could change history, I would draw the arrow pointing at the Anode, lol! —Preceding unsigned comment added by 124.184.0.98 ( talk) 04:20, 20 May 2011 (UTC)
Should we show a log-log VI curve? — Omegatron 04:11, 12 September 2007 (UTC)
In my view the PIV article should be deleted as it is very specific to a particular application, making it misleading the way it is linked in most articles. Brews ohare 19:23, 15 November 2007 (UTC)
I have added an alternative case to the Peak_Inverse_Voltage article that makes it acceptable (in my view). Brews ohare 19:34, 15 November 2007 (UTC)
"similar in appearance to incandescent light bulbs"
1920s ones were, but not more modern valves. The shape, metal innards and base are all different to familiar filament bulbs. Tabby ( talk) 19:02, 26 November 2007 (UTC)
"From the rectifier article: "the difference between the term diode and the term rectifier is merely one of usage, e.g. the term rectifier describes a diode that is being used to convert AC to DC."."
This is incorrect though, there are a number of non-diode devices which have seen use as rectifiers. Commutator and vibrator rectifiers are 2 examples. Tabby ( talk) 19:02, 26 November 2007 (UTC)
The article credits Guthrie with discovering thermionic emission. Per the reference, he studied hot metal objects in air. Thomas Edison discovered the unidirectional conductance in a vacuum from a heated filament. This is surely not a "rediscovery" unless Guthrie also used an evacuated tube or globe in his research. Was a hot metal object in air ever used in the vacuum tube era of electronics? Edison ( talk) 18:38, 12 December 2007 (UTC)
From the page Reverse recovery time which I have nominated for speedy:
Bongomatic ( talk) 08:23, 23 September 2008 (UTC)
I want to know about the working of Power diode.kindly provide me the topic discription "WORKING OF POWER DIODE". thank you. —Preceding unsigned comment added by 202.157.68.10 ( talk) 16:18, 28 July 2009 (UTC)
douse anyone know an example of where a diode is used? —Preceding unsigned comment added by 92.2.17.6 ( talk) 21:13, 10 February 2010 (UTC)
I question if these are actually diodes. Yes, there may be P and N type semiconductor involved, but there is no rectifying junction. -- Speedevil ( talk) 02:01, 29 September 2010 (UTC)
-- Speedevil ( talk) 11:57, 6 October 2010 (UTC)
The working principle part of the semiconductor diode section repeatedly mentions recombination. However, the recombination of electrons and holes in the semiconductor diode is a parasitic effect and not involved in the device operation at all. The majority carriers leave their respective zone due to the "diffusive forces", i.e. their thermal motion. The majority carriers leave behind their ionized dopands which builds up a field that holds them back and stops the process. Additionally, it seems more reasonable to me to first explain the working principle and then discuss the different types. Etaijoverlap ( talk) 22:25, 6 August 2012 (UTC)
The second step is than the approximation of a recombination rate proportional to the increase in minority carrier concentrations (thus a constant lifetime). Later the results are written with the diffusion length L instead of carrier lifetime, but these two are related.-- Ulrich67 ( talk) 16:52, 9 August 2012 (UTC)
Can we please stop saying that conventional current (the direction positively charged particles would take) flows out of the cathode? Cathode is n-type (negative-type) and is doped to contain more electrons, so the conventional current would be flowing into this, as the negative charge flows out of it. Stop reverting what is an actually cogent edit. You will confuse people. — Preceding unsigned comment added by 71.200.116.57 ( talk) 02:21, 5 January 2013 (UTC)
The "Zener Diode" page has the symbol: http://en.wikipedia.org/wiki/File:Zener_diode_symbol-2.svg
which is quite different to the symbol on the "Diode" page: http://en.wikipedia.org/wiki/File:Zener_diode_symbol.svg
Please would someone knowledgeable add a correction or note to indicate why there is a difference ? Darkman101 ( talk) 09:58, 13 May 2013 (UTC)
This article continues the myth that there is a Threshold Voltage in the forward V/I curve, however as the curve is essentially an Exponential, there can be no threshold, ie the rate of change is smooth and continuous, there is no elbow. Draw it on a Log scale and the "elbow" disappears. The idea of an Offset Voltage comes from a simple piece-wise approximation that is taught to students and technicians, but is then taken as gospel. The Threshold Voltage does not in fact exist. Gutta Percha ( talk) 06:58, 17 September 2013 (UTC)
Please see the corresponding discussion thread at Wikipedia talk:WikiProject Electronics. Thanks! • Sbmeirow • Talk • 23:36, 15 December 2013 (UTC)
Overdrive and/or distortion (clipping) is among the most often employed effects in modern music - particular for guitarists. The effect is overwhelmingly achieved through use of diodes, yet no mention is made of this in the article. The various distortion variations are listed here: http://en.wikipedia.org/wiki/Distortion_%28music%29 but that does not focus on curcuits or components. This article may therefore be a good place for this. 83.249.137.51 ( talk) 07:15, 4 March 2014 (UTC)
The mention of Guthrie in the vacuum tube diodes section contains unsupported and incorrect information. The citations do not support that Guthrie discovered thermionic emmission and the speculation in this section of the Wiki is original and incorrect work by the submitter. Examination of the cited sources will show that Guthrie did not present any conceptual model rising to the level of "principle". The second source cited clearly states that researchers such as Guthrie and others of Guthrie's time did not know the mechanism behind the effects they observed. Specifically they did not know whether some chemical reaction in the air might be responsible or whether some other action may be the cause of their observations. Guthrie was working with static electricity rather than current electricity so did not share any observations regarding current electricity in the cited work. 184.45.6.44 ( talk) 16:18, 17 April 2014 (UTC)
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A reference to the newworldencyclopedia about the 1N34 diode has been added. However, upon examining the history there, the phrase "still used in radio receivers as a detector and occasionally in specialized analog electronics" that appears there was just copied from this Wikipedia article. Hence it is not a reference to valid source. I'm restoring the "needs reference" template. Constant314 ( talk) 21:16, 25 October 2017 (UTC)
I haven't looked to see if Constant314's comment of 2017 is still applicable. But I was surprised to find that Wikipedia doesn't have an article dedicated to either the 1N34 and its variants, or perhaps early germanium diodes more generally. The 1N34 was introduced in 1946, and it was the first commercial germanium diode [1]. I easily found more info such as this link [2]. I don't have time to do more on this, but someone should. Oaklandguy ( talk) 02:15, 2 July 2021 (UTC)
I was also quite surprised to learn that the 1N34 did not have its own article. For my blog, I was going to reference it, and as I often do, I did a Google search for "1N34 Wikipedia". Lo and behold, there was no article, but this discussion showed up as the search result.
For an example of a "part number" that has its own article, see the article for the CK722 transistor.
Clemlaw ( talk) 01:12, 11 November 2021 (UTC)
References
How about some pictures of diodes that didn't come from Radio Shack? They go up to 2000 or 3000 amps, but Commons has nothing other than a myriad of painfully drawn schematic symbols and photos of various bitty diodes. We don't need a million more pictures of DO41 cases, the reader surely gets the idea after the first 20 or 30. -- Wtshymanski ( talk) 22:51, 12 November 2017 (UTC)
Based on the diode equation, I would expect the first derivative term in the Taylor series to be significant. I would expect that the small signal I:V curve would be linear or linear + square. However, in mixer and detector applications, the linear term may be unimportant since it produces harmonics at the fundamental which may be filtered out. Anyway, I think the statement that the I:V curve is square law needs some clarification. Constant314 ( talk) 18:54, 7 June 2018 (UTC)
I would suggest removing all discussion in Diode § Shockley diode equation out of this article and instead merge it into its dedicated page Shockley diode equation. The most this page's section on it should provide is writing out the equation and identifying the names of variables and maybe including a thumbnail picture, and maybe mention that details can be found in Shockley diode equation page. Em3rgent0rdr ( talk) 19:05, 18 January 2023 (UTC)
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Could anyone say how do you say in english the phrase corresponding to the ratio of temperature to voltage for a given junction and/or diode? I want to make a bulgarian article with translation of this phrase. I am talking about the positive and negative coefficient/ratio of temperature to voltage for some semiconductor elements. Also how do you call a backward way of the current? When it is used for testing for example on a given circuit you put + to ground and - to + at the source of voltage/current I think. Please also answer on my private discussion page :).-- Leonardo Da Vinci ( talk) 19:12, 25 March 2011 (UTC)
Yes but for ""temperature coefficient" of the diode voltage" maybe you mean only for diodes? The exact voltage is dependant on the temperature. Increasing temperature increases the current/voltage flow in a given electrical device. So this event must have some specific phrase to call it. Something like TCV - Temperature Coefficient of Voltage or something you know ;). It also can be positive and negative depending on the working voltage and diode ;). — Preceding unsigned comment added by Leonardo Da Vinci ( talk • contribs) 14:53, 26 March 2011 (UTC)
Does anyone know which type of symbol (DIN 6779 / ISO / IEC / ...) the displayed symbol in the article is? it would be nice to add the comment there...
_i_ ^ / \ --- |
Does anyone know how a diode prevents current from flowing in one direction but permits it in the other?
In a vacuum diode, the materials of the anode and cathode have different attraction to keep their electrons, the cathode may be pointed to concentrate the electric field and the cathode is usually heated to "boil" off electons. The anode is called the "plate" because it is flat to spread out the field so it is not anywhere strong enough to pull out electrons. Sorry not to include links. I can help find more detail if needed. David R. Ingham 04:44, 7 January 2006 (UTC)
Does the use of galena as a detector (referred to in semiconductor devices) predate the vacuum tube rectifier? - David M
I thought I'd just explain why I changed "current" to "charge". Current doesn't really flow from A to B, but charge does. Just like "water flow rate" doesn't flow anywhere, but the water itself does. -- User:Dgrant
It was I who changed "charge" back to "current", but in the light of the comments above, I decided that my version was no more or less correct than the previous one. Now, in an effort to please everybody, I have expanded the definition to mention both charge and current.
I think that the question of whether current "flows" or just "is" is merely a question of style. At worst, I think that "current flows" is harmlessly redundant. -- Heron
As this is the general 'diode' article, it seems to me that the section on rectification schemes can be moved into rectifier, and the discussion of p-n diode characteristics can be cut down and handled on p-n junction instead. Any thoughts? - mak o 05:45, 10 July 2005 (UTC)
Yes, I agree this article is getting confused between rectifier and diode descriptions. After all, many diodes are not in fact used as rectifiers at all. Rectifiers should IMHO be moved to the rectifier article. Alan
I had not heard of this device before. Does it exist? Can anyone refer to an example part or manufacturer or example of useage?? Al
Gas Discharge Diode : There are two electrodes, not touching, in some kind of gas. One electrode is very sharp. The other has a smoothly curved finish. If a strong negative potential is applied to the sharp electrode, the electric field near the sharp edge or point is enough to cause an electrical discharge in the gas, free carriers are created, and a low resistance path appears. If the reverse potential is applied, the electrical field strength around the smooth electrode is not enough to start a discharge. (The discharge can only start easily at the negative end because electrons are much more mobile than positive ions.) These are sometimes used for high-voltage high-current rectification in power supply applications.
There are no V-I curves for the different diodes. Perhaps one for the "normal" or rectifier P-N diode and one for the zener/avalanche diodes would be helpful. If there's consensus, I will create the images and insert them into the articles - unless the images have already been created and excluded for some reason. Rohitbd 12:59, 27 September 2005 (UTC)
Since no one has objected, I have added the image to the article. Rohitbd 10:08, 5 October 2005 (UTC)
The IV curve shown looks pretty symmetric. Forgive my ignorance, I guess this may be true for some types of diode, but the whole point of using a rectifying diode is that the characteristic isn't symmetric. More asymmetry would also help to more clearly identify forward and reverse bias etc... Michi zh ( talk) 09:49, 22 July 2011 (UTC)
Suggestions to add to the I-V plot: Get rid of the kink at V=0. Compare ideal with nonideal diodes. Draw it to scale, with an inset to zoom in to show the (tiny!) reverse bias leakage current and the line passing through the origin (I=0 at V=0). I'll add these if I get time, otherwise please Be Bold. Mwistey ( talk) 06:04, 14 November 2011 (UTC)
I like the suggestions by talk, but since Nov. 2011 no one implemented them! Here is my contribution: I prepared a SVG figure with the Shockley equation and some realistic parameters.
Shall we replace Fig. 5 in the article? Hldsc ( talk) 18:19, 9 July 2013 (UTC)
In Zenear diode Avalanche breakdown happen with respect to increase of I amps. Here I am assuming I amps and V volts is in a Bijection function. It means diode couldn't tolerate the I amps which is raised or given in period of time. In that time several spike and surges happens so or while it might that Avalanche happens so. Now lets revisit the Graph, instead of taking I amps units in Y-axis and V volts in X-axis. Lets take the time alone in anyone of the axis, say in Y. Then the way Zenear diode function is can be said as f(x), like a share market graph. When it is plotted f(x) reveals several truths. That can be analyzed in several Metrics and many assertive truthful abstract can be get to known by the fact. NOW say Avalache starts freaks out. F(X) becomes collateral. But assume we formed the powerful Zenear as is so. So f(x) still in assertive metrics. So finally the function T is impacted by some ev (Electron Volt). Now think in such a way that this Zenear Diode is formed for this functionality only. That means the impact say ΔT happens within Zenear. So VLSI and connected systems is as powerful as LHC So, hence this ΔT can impact T.
F(X) == T + ΔT => F(X) == dt.
It reveals, it is just that there exists and can be x=f(y) by holding and reversing
Bijection in virtual or in realistic way. Lets form the powerful circuits.–
Dev Anand Sadasivam
t@lk 11:52, 11 June 2015 (UTC)
i love how the list of diode types is in a completely random order. the descriptions are fine, but it's impossible to quickly find the desired entry. typical "missing the forest for the trees" behavior from wikipedians.
I don't understand the paragraph concerning gold-dopped diodes: gold is supposed to make the diodes operating faster, but the paragraphs ends on the topic of main rectification (i.e very slow operation). Also, it is said that gold-dopped diodes can operate at "signal" speed. Does that mean "high frequency signal"? CyrilB 13:24, 6 March 2006 (UTC)
Is it planed or hoped that gasious state devices will be described here. David R. Ingham 04:46, 7 January 2006 (UTC)
Please stop giving Shockley more credit than deserved. He didn't invent the transistor. And, it could easily be argued he didn't invent the BJT. — Preceding unsigned comment added by 74.77.148.238 ( talk) 15:43, 8 April 2017 (UTC)
I've heard something about the equation not taking into account "photon recycling effects", which cause the equation to be very inaccurate in the case of photovoltaics. I think this would be significant enough to note on the page. Fresheneesz 21:18, 23 February 2006 (UTC)
@ 2006-06-25 13:36Z
I always thought the first diodes were point contact diodes, used in crystal sets, but the article claims the first diodes were thermionic. Any references to back the article's claim? Also, my understanding is that the symbol for a diode is actually a drawing of a point contact diode. It has nothign to do with arrows and the direction of current flow. The symbol is polarised as it is because the 'whisker' of a point contact diode is the anode and the flat plate is the cathode. The "arrow" in the diode symbol is really a sharpened needle (whisker) on a flat plate. John Dalton 11:27, 15 March 2006 (UTC)
I agree that the article needs clarifying. I will try to work on it a little. Maybe the confusion is that the first thing called a "diode" was a thermionic tube. Crystals predated vacuum tubes but they were called rectifiers. Today it would be called a Schottky barrier diode. Snafflekid 19:46, 15 March 2006 (UTC)
From the rectifier article: "the difference between the term diode and the term rectifier is merely one of usage, e.g. the term rectifier describes a diode that is being used to convert AC to DC.". The rectifer article goes on to describe the *process* of rectification with passing reference to "point contact rectifiers or crystal detectors". As a *device* crystal diodes/rectifiers seem to have "fallen through the cracks" in that the device itself is outside the scope of the rectifier article and not considered to be a diode in the diode article. Perhaps we are a victim of changing terminology? Crystal (point contact) diodes were originally named by the function they performed. At some point as rectifiers found wider application (possibly corresponding with the invention of the themionic diode??) the name of the function (rectification) and device (diode) seem to have been separated. Possibly this is why themionic diode have gottten the label of "first diodes", as they appeared around the same time as the word "diode" found wider usage? Need to find references to back up this theory! John Dalton 20:25, 15 March 2006 (UTC)
I've added a section on crystal diodes. The article is now internally inconsistent as both thermionic diodes are crystal diodes are claiming to be the first. If I get the time I'll try to fix it, but fel free to jump in before me. John Dalton 21:03, 15 March 2006 (UTC)
The saga continues. I'm not so sure crystal diodes were used before thermionic diodes now. The principle of crystal diodes was discovered in 1874. The principle of thermionic diodes was discovered in 1873. A Thermionic device was patented in 1883, but developed no further. The first practical thermionic diode was patented in 1904. Crystal diodes were in use before then. Maybe I'll just add a 'history' section to the article. John Dalton 21:24, 15 March 2006 (UTC)
By my understanding, crystal radios got their name from the crystal in the rectifier, not the quartz crystal in the earphone. John Dalton
I didn't see any reference to a needle and a razor blade?
Yes, the word crystal in the phrase "Crystal Radio" refers to the crystal used in the rectifier. - Tim —Preceding unsigned comment added by 68.249.1.76 ( talk) 17:04, 3 November 2009 (UTC)
Would anyone know the reasoning behind placing a diode across the controls of a DC low voltage relay?
There is now an article that talks about exactly this -- flyback diode. So ... should we explain this in both diode and flyback diode ? -- 75.37.227.177 15:43, 25 July 2007 (UTC)
(mostly as a reminder to myself) the section on radiation detection needs clean-up and correction. Unfortunately also the semiconductor detector article is not good, so I can't copy from there. Sergio Ballestrero 23:10, 3 May 2006 (UTC)
I made the titles of the schematic diagrams into links to their respective articles.-- 24.16.148.75 23:24, 30 June 2006 (UTC)
I have removed the obscure line:
Engr.Louriel R. Manatom
I have no idea why it was there; if somebody has an explanation, he's free to offer it. John Reid 07:36, 16 October 2006 (UTC)
I suggest this be added to the caption. It would make the illustration useful for someone trying to figure out which way a diode goes. The trouble is I'm not sure it's true - can someone who knows, check?
—The preceding unsigned comment was added by 190.56.56.246 ( talk) 13:08, 17 April 2007 (UTC).
The term "diode" does not come from "two" and "odos". The "di" is from "dia" so "diodos" is "dia-odos", the path through which something passes. On the other hand in William Eccles the story goes that Eccles invented the term Diode to describe an evacuated glass tube containing two electrodes; an anode and a cathode.. However the word doesn't have that meaning in greek, it would be nice if there was a source so we could know what Eccles was really thinking - Badseed 00:48, 27 May 2007 (UTC)
Eccles was honest enough to site the Greek roots of the word diode, only he made an understandable grammatical error, mistaking "δι-" as derived from the word for number "2". Τhe origin is INDEED the word "δίοδος" (pronounced: thEE-o-thos) which exists in the Greek dictionary since ancient times and it means "through passage". It is in fact a compound word, derived from the preposition "διά" (pronounced thee-Ah") and the noun "ὁδός" (pronounced: o-thOs) with the (weaker) vowel "α" dropped in favor of the (stronger) vowel "ο". Τhis is a common grammatical phenomenon in Greek called "elision" in English. The "δι-" is not derived therfore from the word "δύο" (pronounced:thEE-o) because the meaning of the word "δίοδος" does not mean "two paths" but the exact opposite: "One path" [only] between two points. You may consult an English-Greek or (even better) directly a Greek dictionary, if -of course- you possess a good understanding of the [Greek] language. A good starting point would be HERE. BTW, Etymology is indeed based on meaning and logic (and many other things) but not so much in history. It is defined as the study of the origin of words and the way in which their meaning and spelling have changed "throughout" history but is not "based" ON history. Thank you for your attention and you may contact me at the following address if you have any questions: R1100RA@gMail.com.
"In electronics, a diode is a two-terminal component,"
You'd expect so from the word derivation, but direct (filament heated) thermionic diodes have 3 terminals. (Similarly, direct heated triodes have 4 terminals.)
For sources for this, see any valve/tube basics text.
The term 'diode' may have originated with a 2 electrode device, but for a century or so, ie almost the entire history of the word, it has been used to describe devices that conduct one way better than the other, and of course some of these are not 2 terminal devices. Tabby ( talk) 18:20, 26 November 2007 (UTC)
==
User ( Wbm1058) does not possess a solid knowledge of the Greek language, therfore, makes a few erroneous statements. Δι- by it self does not always mean "two". It could also be a derivation from the preposition "διά" as I previously explained. The word for the number two is "δύο". Indeed the word dipole comes from the word "δίπολος" which in Greek is an adjective meaning "having two poles". The etymology is as such: Δύο+πόλος the "o" is dropped, the word becomes δύπολος and for grammatical/spelling reason that go beyond the scope of this the ypsilon "υ" is converted into a iota "i". Finally, δίπολος is the nominative (=ονομαστική) case (=πτώση) but in normal use the word appears in the accusative (=αιτιατική πτώση) e.g. "τον δίπολο" which also very similar but should not be confused with the nominative of the same adjective but in the neutral gender e.g. "το δίπολο".
Finally, Tabby, a resistor is a two terminal component also, is n't it? So is a capacitor, a battery, a rheostat, a coil, a magnet and so forth. I can think of many components with "two-terminals" which -however- are NOT a diode. E.g. having two terminals does not qualify something as a diode. It is the one-way through passage of electrons that give a diode its unique name. Again the di- in diode comes from the preposition "διά" which means (almost verbatim) "through". The di- in dipole on the other hand comes from the number two="δύο", e.g a magnet is indeed a dipole because it is characterized by the presence of TWO poles with opposite ...polarity. Again, please consult an appropriate dictionary, BEFORE you commit into writing inaccurate statements, especially about matters that you possess little or no knolwdge at all. Sincerely, R1100RA@gMail.com
This article is barely more than a stub. No mention of the 1NXXXX numbering system, used for decades as the main way of labelling diodes. No references. No See also or External links.- 69.87.199.84 12:38, 20 June 2007 (UTC)
A standardized 1N-series numbering system was introduced in the US by EIA/ JEDEC (Joint Electron Device Engineering Council) about 1960. Among the most popular in this series were: 1N34A/1N270 (Germanium signal), IN914/1N4148 (Silicon signal) and 1N4001-1N4007 (Silicon 1A power rectifier).
"The JEDEC Solid State Technology Association (Once known as the Joint Electron Device Engineering Council), is the semiconductor engineering standardization body of the Electronic Industries Alliance (EIA), a trade association that represents all areas of the electronics industry. JEDEC was originally created in 1960 as a joint activity between EIA an NEMA, to cover the standardization of discrete semiconductor devices and later expanded in 1970 to include integrated circuits." [1]
http://news.elektroda.net/introduction-dates-of-common-transistors-and-diodes-t94332.html http://semiconductormuseum.com/Museum_Index.htm - 69.87.199.84 13:34, 20 June 2007 (UTC)
There seems to be a small error in this section of the article. The author says that when an electric field is placed across the diode which has the same polarity as the "built -in" electric field, then current is allowed to flow. Assuming that the author is using the conventions of positive charge movement constituting current flow and electric field lines pointing from regions of positive charge to regions of negative then and only then does the reader know what he means when he says that current flows from the P region to the N region. P-type semiconductors are doped with group IIIa atomic elements and N-type semiconductors are doped with group Va atomic elements. On their own they consitute neutral atoms, however, when placed in the silicon lattices of a PN diode electrons move around to form these "built-in" electric fields. The author says that in order for the holes naturally existing in the P region to be filled wiht electrons, electrons must leave the N region to combine with the holes. Being group V elements in the N region, this would leave behind a net positive charge in that region. Conversly, there being group III element in the P region, having these holes filled would create a net negative charge in that region. So we have established that there then should be electric field vectors in the material pointing from the N region to the P region. Since diodes only allow current to flow in the direction of P to N however, placing an electric potential across the diode which has the opposite polarity of the "built-in" field will allow current to flow. This contradicts the statements of the author. Furthermore, you can make sense of this in your mind by thinking of the "built-in" field as a manefestation of the depletion of charge carriers at the interface as the author suggests you do. Then since this built-in field is caused by the device taking on insulating qualities, it would make sense that you should destroy these qualities to allow for conduction of charge: hence placing an electric field across the device with a polarity opposite to that of the "built-in" electric field. 24.248.230.218 16:13, 1 July 2007 (UTC)Ted Cackowski Jr.
hello this will be grate if u give a sketch sectional view of a diod with labeling and from that labeling discribing the specific usage of that part of the object(diode).-rathin dholakia(india)
I wonder if more explicit detail of current flow convention could be described. I am thinking from the perspective of "in the days" of thermionic valves, circuit nomenclature discuss current in terms of electrons (from Cathode to Anode). Its easy to depict the idea of electrons "boiling" off a heated Cathode and flying to the positive charged Anode. However when semiconductors arrived on the scene, circuit nomenclature discussion of current flow became the "conventional" current flow, and so the arrow in the diode symbol depicts the reverse of what would sensibly be the current flow (as in electrons). If someone knows and can write about the history of how this came about, I think would be most appropriate in this diode subject. If I could change history, I would draw the arrow pointing at the Anode, lol! —Preceding unsigned comment added by 124.184.0.98 ( talk) 04:20, 20 May 2011 (UTC)
Should we show a log-log VI curve? — Omegatron 04:11, 12 September 2007 (UTC)
In my view the PIV article should be deleted as it is very specific to a particular application, making it misleading the way it is linked in most articles. Brews ohare 19:23, 15 November 2007 (UTC)
I have added an alternative case to the Peak_Inverse_Voltage article that makes it acceptable (in my view). Brews ohare 19:34, 15 November 2007 (UTC)
"similar in appearance to incandescent light bulbs"
1920s ones were, but not more modern valves. The shape, metal innards and base are all different to familiar filament bulbs. Tabby ( talk) 19:02, 26 November 2007 (UTC)
"From the rectifier article: "the difference between the term diode and the term rectifier is merely one of usage, e.g. the term rectifier describes a diode that is being used to convert AC to DC."."
This is incorrect though, there are a number of non-diode devices which have seen use as rectifiers. Commutator and vibrator rectifiers are 2 examples. Tabby ( talk) 19:02, 26 November 2007 (UTC)
The article credits Guthrie with discovering thermionic emission. Per the reference, he studied hot metal objects in air. Thomas Edison discovered the unidirectional conductance in a vacuum from a heated filament. This is surely not a "rediscovery" unless Guthrie also used an evacuated tube or globe in his research. Was a hot metal object in air ever used in the vacuum tube era of electronics? Edison ( talk) 18:38, 12 December 2007 (UTC)
From the page Reverse recovery time which I have nominated for speedy:
Bongomatic ( talk) 08:23, 23 September 2008 (UTC)
I want to know about the working of Power diode.kindly provide me the topic discription "WORKING OF POWER DIODE". thank you. —Preceding unsigned comment added by 202.157.68.10 ( talk) 16:18, 28 July 2009 (UTC)
douse anyone know an example of where a diode is used? —Preceding unsigned comment added by 92.2.17.6 ( talk) 21:13, 10 February 2010 (UTC)
I question if these are actually diodes. Yes, there may be P and N type semiconductor involved, but there is no rectifying junction. -- Speedevil ( talk) 02:01, 29 September 2010 (UTC)
-- Speedevil ( talk) 11:57, 6 October 2010 (UTC)
The working principle part of the semiconductor diode section repeatedly mentions recombination. However, the recombination of electrons and holes in the semiconductor diode is a parasitic effect and not involved in the device operation at all. The majority carriers leave their respective zone due to the "diffusive forces", i.e. their thermal motion. The majority carriers leave behind their ionized dopands which builds up a field that holds them back and stops the process. Additionally, it seems more reasonable to me to first explain the working principle and then discuss the different types. Etaijoverlap ( talk) 22:25, 6 August 2012 (UTC)
The second step is than the approximation of a recombination rate proportional to the increase in minority carrier concentrations (thus a constant lifetime). Later the results are written with the diffusion length L instead of carrier lifetime, but these two are related.-- Ulrich67 ( talk) 16:52, 9 August 2012 (UTC)
Can we please stop saying that conventional current (the direction positively charged particles would take) flows out of the cathode? Cathode is n-type (negative-type) and is doped to contain more electrons, so the conventional current would be flowing into this, as the negative charge flows out of it. Stop reverting what is an actually cogent edit. You will confuse people. — Preceding unsigned comment added by 71.200.116.57 ( talk) 02:21, 5 January 2013 (UTC)
The "Zener Diode" page has the symbol: http://en.wikipedia.org/wiki/File:Zener_diode_symbol-2.svg
which is quite different to the symbol on the "Diode" page: http://en.wikipedia.org/wiki/File:Zener_diode_symbol.svg
Please would someone knowledgeable add a correction or note to indicate why there is a difference ? Darkman101 ( talk) 09:58, 13 May 2013 (UTC)
This article continues the myth that there is a Threshold Voltage in the forward V/I curve, however as the curve is essentially an Exponential, there can be no threshold, ie the rate of change is smooth and continuous, there is no elbow. Draw it on a Log scale and the "elbow" disappears. The idea of an Offset Voltage comes from a simple piece-wise approximation that is taught to students and technicians, but is then taken as gospel. The Threshold Voltage does not in fact exist. Gutta Percha ( talk) 06:58, 17 September 2013 (UTC)
Please see the corresponding discussion thread at Wikipedia talk:WikiProject Electronics. Thanks! • Sbmeirow • Talk • 23:36, 15 December 2013 (UTC)
Overdrive and/or distortion (clipping) is among the most often employed effects in modern music - particular for guitarists. The effect is overwhelmingly achieved through use of diodes, yet no mention is made of this in the article. The various distortion variations are listed here: http://en.wikipedia.org/wiki/Distortion_%28music%29 but that does not focus on curcuits or components. This article may therefore be a good place for this. 83.249.137.51 ( talk) 07:15, 4 March 2014 (UTC)
The mention of Guthrie in the vacuum tube diodes section contains unsupported and incorrect information. The citations do not support that Guthrie discovered thermionic emmission and the speculation in this section of the Wiki is original and incorrect work by the submitter. Examination of the cited sources will show that Guthrie did not present any conceptual model rising to the level of "principle". The second source cited clearly states that researchers such as Guthrie and others of Guthrie's time did not know the mechanism behind the effects they observed. Specifically they did not know whether some chemical reaction in the air might be responsible or whether some other action may be the cause of their observations. Guthrie was working with static electricity rather than current electricity so did not share any observations regarding current electricity in the cited work. 184.45.6.44 ( talk) 16:18, 17 April 2014 (UTC)
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A reference to the newworldencyclopedia about the 1N34 diode has been added. However, upon examining the history there, the phrase "still used in radio receivers as a detector and occasionally in specialized analog electronics" that appears there was just copied from this Wikipedia article. Hence it is not a reference to valid source. I'm restoring the "needs reference" template. Constant314 ( talk) 21:16, 25 October 2017 (UTC)
I haven't looked to see if Constant314's comment of 2017 is still applicable. But I was surprised to find that Wikipedia doesn't have an article dedicated to either the 1N34 and its variants, or perhaps early germanium diodes more generally. The 1N34 was introduced in 1946, and it was the first commercial germanium diode [1]. I easily found more info such as this link [2]. I don't have time to do more on this, but someone should. Oaklandguy ( talk) 02:15, 2 July 2021 (UTC)
I was also quite surprised to learn that the 1N34 did not have its own article. For my blog, I was going to reference it, and as I often do, I did a Google search for "1N34 Wikipedia". Lo and behold, there was no article, but this discussion showed up as the search result.
For an example of a "part number" that has its own article, see the article for the CK722 transistor.
Clemlaw ( talk) 01:12, 11 November 2021 (UTC)
References
How about some pictures of diodes that didn't come from Radio Shack? They go up to 2000 or 3000 amps, but Commons has nothing other than a myriad of painfully drawn schematic symbols and photos of various bitty diodes. We don't need a million more pictures of DO41 cases, the reader surely gets the idea after the first 20 or 30. -- Wtshymanski ( talk) 22:51, 12 November 2017 (UTC)
Based on the diode equation, I would expect the first derivative term in the Taylor series to be significant. I would expect that the small signal I:V curve would be linear or linear + square. However, in mixer and detector applications, the linear term may be unimportant since it produces harmonics at the fundamental which may be filtered out. Anyway, I think the statement that the I:V curve is square law needs some clarification. Constant314 ( talk) 18:54, 7 June 2018 (UTC)
I would suggest removing all discussion in Diode § Shockley diode equation out of this article and instead merge it into its dedicated page Shockley diode equation. The most this page's section on it should provide is writing out the equation and identifying the names of variables and maybe including a thumbnail picture, and maybe mention that details can be found in Shockley diode equation page. Em3rgent0rdr ( talk) 19:05, 18 January 2023 (UTC)