Diodes Definition and 190 Threads

The bulb/LED is connected to a long cable consisting of two insulated wires. I want to know how is this phenomenon happening in a physical way. I mean, not referring to the quality of used materials. I suppose that for the bulb, it happens kinda Joule effect, and when the circuit becomes...

Hello there, I've been working through a task (that doesn't have an answer sheet or explanation) in which we plot I against V for three different diodes. Each has a different threshold voltage and displays the usual charcteristic curve. The final question is this: "It is suggested that the...

My question for now is as follows: Why does a high doping concentration causes a decrease in the thickness of depletion region. Any help will be highly appreciated! Thanks a bunch Regards!

My understanding of barrier potential is as follows : Due to the holes and electrons combining in the diode a depletion region is formed. Essentially this region has no mobile charge carriers (as the holes and electrons have combined) and thus the ions (whose holes/ electrons have combined)...

This is not really homework, but I'm having trouble understanding it intuitively. I came across this when learning about the space charge layer of a diode. The solution I know simply uses the 1D form of Gauss's law: ##\vec{\nabla} \cdot \vec{E}## = ##\dfrac{\rho}{\epsilon_0}## becomes...

Dear readers, What happens to the divergence values of a laser diode (along and perpendicular to the emitting surface) when the driving current is increased or the output power is increased? Does the divergence: Increase along one axis? Increase along both axes? Decrease along both axes...

Hello, In regards to this relay, TQ2SA-1.5V Panasonic 2 Form C AS Single side stable, 1.5VDC 2A DPDT NON-LATCHING SMD Relay https://www.mouser.com/ProductDetail/769-TQ2SA-1.5V PDF 1 of Relay PDF 2 of Relay (specifically pages 5-6) is attached at the bottom as a pdf file. I was previously told...

I have a simple 12vdc system on a boat with a single battery bank. There is a stock alternator on the engine and I've inherited a solar panel i'd like to install. I understand that most solar charge controllers have built in back feeding prevention, but will i also need blocking diodes on the...

What would happen if we put two diodes together with an insulator in between? p/n/insulator/p/n

Well I was just wondering how ohmic resistance works in a diode . I mean let's take forward bias mode.In forward bias mode electrons are diffused from the n type region to the p type region.The depletion layer still exists but is very narrow.So according to Drude model of ohmic resistance...

Hello All, 1. Homework Statement I am confused about applying constant voltage drop model or iteration model . While trying to find the diode currents, results obtained from iteration is not consistent ( I_d1 and I_1k is not equal) so the diode currents . ALsoIs this convenient to use...

This is not a home-work or course-work question. It is hypothetical, driven by curiosity. Are any Tunnel / Esaki diodes being made ? What grade of eg University facility / silicon forge would be required to craft a bespoke batch ? Yes, I know a few Russian 'New Old Stock' diodes some-times...

This is a 12-0-12 transformer that I intend to use in my circuit: Why are there three wires in the secondary? One is of course the neutral (in black). Why are there two live wires? As an additional question, can I use four 1N5408 rectifier diodes to convert the output of this transformer to...

I was told once that two 1 amp tv type diodes parallel will not work because one will always carry the load, but I am working on a car 30 amp battery charger and it has 6 diodes 1/2" press in type all parallel same as from a 10DN series Delco alternator from the 60's where they used three...

For my understanding there should be no big difference in i-v curve between regular p-n junction and p-i-n junction, the only difference i can think about is do to the bigger resistance of the intrinsic layer. The curve should look the same only the current will rise little bit slower, because...

Homework Statement I came across a question asking " which one of these circuits has the largest resistance to the current? Homework EquationsThe Attempt at a Solution * In A the positive terminal of the battery is connected to the p-type region and the negative one to the n-type region...

Homework Statement Homework EquationsThe Attempt at a Solution I am not quite sure how to deal with the two diodes in parallel . How do we know what is the potential applied across the two diodes so as to decide which one is conducting ?

Homework Statement Homework EquationsThe Attempt at a Solution Since both D1 and D2 are forward biased for the positive half cycle for the voltage input , current will flow through them . Both the diodes offer very little resistance , but do they act like connecting wires when forward biased...

I need help understanding what will happen when the switch in closed in this circuit. What I want to happen is for Cap B to charge first and then discharge into Cap C. When the charged capacitor begins to discharge, will it charge Caps B and C at the same time? It will have to overcome the...

Ok so I've been reading a book on electronics and I got to a section that talks about full-wave bridge rectifiers. This is the diagram the author gives: In this diagram he says the D2 and D4 diode are forward biased. But, doesn't the current flow through D2, goes through the resistor, and then...

Hi everyone. I am doing some research about Cockcroft Walton Accelerators, because I need to be able to explain them to others as a part of a project. However, in order to understand the Cockcroft Walton Accelerator, I need to be able to understand the Cockcroft Walton Generator first. I have...

I have 52 laser diodes, rated 5VDC, 5mW, wired in parallel and powered by a battery, rated 5V, 2A (I measure 2.7). I'm thinking some diodes burn out because as the voltage drops, the current becomes too great. The diodes manufacturer states the maximum operating current of each diode is 20mA. I...

In a diode, we have N side, P side, and a depletion region, made of positive and negative charged sides. N side and P side of the diodes are neutral charge. In N side there are free electrons. In the positive charged side of the depletion region, there are positively ionized atoms that "lack"...

Hey everyone, this is semi-related to electrical engineering and a quick search didn't appear to turn anything up regarding this question specifically so I figured this is an appropriate place to ask this. I've bought this laser diode rated for 1.9 - 2.2 volts for a project I'm working on. I've...

Hello everybody, I wish to do some experiments with TRAPATT (TRApped Plasma Avalanche Triggered Transit) diodes, but after much googling I was unable to find the name of any manufacturer of such diodes. Anybody with useful pieces of info?... Thank you! :bow:

Hi, I'm having some trouble wrapping my head around some of the concepts and language of charge transport in Photovoltaic cells (and thus pn-diodes). My biggest problem is understanding the role played by the emitter region vs. the depletion region. In a typical PV cell the front emitter...

Hello not sure if I've posted this in the right section. But could someone tell me the purpose of the zener diode and the diode in parallel with the resistor? Never seen this configuration before. Thanks!

Homework Statement I have to find Vo in every diode state possible. We know diode Vf = 0.7 Homework Equations Va-Vc < 0.7 = diode OFF Va-VC > 0.7 = diode ON The Attempt at a Solution State 1: if D1 OFF and D2 OFF Vo will be equal to Vi State 2: if D1 OFF and D2 ON Vo will be equal to...

Homework Statement A picture of the problem is provided in the attachment Homework Equations there is no special relations except I= Is x e^(vd/Vt) The Attempt at a Solution i have a solution for from the solution manual but i do not understand it like the I2 equation i don't get reasonable...

G'day all! I've got an H-bridge here from an old motorised toy.. as I want to use it for something else and the RF receiver is no use to me for this project i figured i' strip the H and stripboard it. I noticed though that there are no diodes to protect the four transistors (yes they are...

Helo, I am in an electronic course and we just started studying diodes. I am stuck on the following problem: Place a 100 ohm resistance in series with a diode, and plot current versus voltage across the series combination. I am also given the following values for the diode: n = 1, Is =...

Hey All, i just joined today to try and figure out what size of diodes i need for the project I am working on. I am working on installing a new Light Bar and Flood Lamps to my Jeep to get better light at night. This is my hope to accomplish: Relay 1 will be used to turn the LED Light Bar and...

Homework Statement In Figure Q22, the empirical junction diode equation is : (eqn is in the picture attached) for both diodes D1 and D2, where VT = 26 mV at room temperature, n = 1, IS = 3.5 x 10-14 A, R1 = 600 Ω, R2 = 300 Ω, R3 = 200 Ω, VS = 9 V. Calculate the Q-points ID = _____ mA and VD =...

Homework Statement I am working on this problem, where I need to find I and V Homework EquationsThe Attempt at a Solution I know the right answer will be when D1(left) is off and D2(right) is on, we went over the solution in class. I wanted to do the 4 assumptions just to try to understand. I...

Homework Statement I am practicing problems like this: where Vs=10V, R=2kohm, they say it is like a battery + ideal diode with VD=0.7V I have to sketch the transfer characteristic Vo=f(Vs) and draw the waveform of Vo(t) Homework EquationsThe Attempt at a Solution I am really unsure how to go...

Hello, does anybody know if there is a connection between the voltage (work) for the bandgap of a diode, the temperature voltage and the flux voltage?

Homework Statement Find the V and I in the circuit shown below: Homework Equations D1 or 2 is off=short circuit D1 or 2 is on=open circuit The Attempt at a Solution So, my confusion lies with deciding the on and offs of D1 and D2 . My assumption is that both of them are on and that is due...

Homework Statement When answering the questions below, you may assume that the source resistance is negligible and that each diode has a potential difference of 0.6 V across it when conducting. For the circuit below calculate (a) the current in the 30 Ω resistor, (b) the current in the 60 Ω...

In a circuit that I'm building, I have a power source of 5 volts DC that powers various components. A few of them are LED lights and light bulbs. -Background Info- In circuit 1, I have a step up buck "2A DC-DC boost step-up Conversion module MicroUSB 2-24V 3V to 5v-28V 12v 9v 24v"...

I want to make something clear. Most diodes have in their datasheet some current for a given treshold voltage. For example a led will pass 20mA current when 4volts are applied to it. Or a zener diode's minimum turn on current is 10mA when 5,6 volts are applied across it. Does this mean this...

Homework Statement Find the change in diode voltage if the current changes from 0.1 mA to 10 mA. Ans. 120 mVHomework Equations V2-V1=VTln(I1/I2)The Attempt at a Solution That is all the information given. The only equation I can think to use is the diode voltage/current relationship, but a...

Homework Statement I have recently performed an experiment where the voltage drop and current through a diode were measured. I am wondering why the voltage drop across the diode changes. Theoretically, the voltage drop should stay the same as there is a certain amount of energy required to get...

Homework Statement If V(1)=10 V and V(0)=5 V, and the voltage threshold for all diodes is 0.6 V. Determine the current through every diode and the output voltage Vo if V1=V4= 5V and V2=V3=10 V. Homework Equations Basic KCL & KVL. The Attempt at a Solution I know that the basic idea to...

in Voltage Tripler and Quadrupler , why don't current divide between two diodes ( D1 , D3 ) or ( D2 , D4 ) ? they are forward in the same cycle , right ? I understand that charging happens in a very little time , so two cycles already is not shown on oscilloscope but in BoyleStad is explained...

So which method works better for random number generation(in terms of flatter frequency spectrum): transistor breakdown or Zener noise? I want to know whether to use a Zener diode or a Transistor when building a white noise generator. And FTR I intend to use Germanium because of its higher...

Is there is a way to connect three LEDs so that there are three cases where one LED only is working in every case of the three without using micro controller ?

2 diodes connected back to back ...and 2 anti-parallel diodes...are these 2 configurations same...i mean work similarly?...i think NO...rectify me please if wrong...it might be a silly question but i would really appreciate the answer

Homework Statement Homework Equations Clippers equations The Attempt at a Solution I knew that we will put a two diodes( with a dc battery {2.3 V} series) parallel to each other in opposite directions .. but what meant by gain is 0.95 ?

I have attached the image with post. Answer to question is given as A. I am not getting the explanation to how can one zener diodes be in breakdown and other not. I think if the combined voltage of 150V is applied then only breakdown occurrs in both the diodes simultaneously.

can i understand at OR gate with diodes , why o/p not equal the sum of two voltages (5+5=10v) , it's confusing me ?