Diode Definition and 571 Threads

i want to design a diode circuit where the Vo vs. Vi looks like this: Vi between -2 and 2 Vo = Vi Vi between 2 and 4 Vo is a linear with slope 0.5 Vi between -2 and -4 Vo is a linear with slope 0.5 Vi>4 Vo=3 Vi<4 Vo=-3 how can i do this?

We have been looking at P-N junction diodes in our lab session this week and investigating the current through the circuit and how this relates to the Voltage. We are using the approximation: I = (I0)*exp(qV/kT) We measured the voltage and the current for a few different voltages and this...

Hi, Can anyone explain me the working of 4 diode DSBSC Balanced modulator circuit. ie how multiplication occurs when switching. The image is attached. -Devanand T

HI. I am using Piezo Electric as a AC voltage source which gives voltage spikes of around 35V little current because the impedance of the material is verry high, I would like to clip this voltage to 22 Volts i have seen that a 2 x 22V zenner diodes can be used back to back is thie right or...

Homework Statement [PLAIN]http://postimage.org/image/bd4pyoqkt/ Make a sketch of Vout vs Vin for Vin from 0 to 5 V, assuming that both diodes have a diode drop of 0.5 V Homework Equations None that I know of. The Attempt at a Solution The way I see it, the Vout will start at...

Homework Statement Graph V_out as a function of I_in Attempt: I was able to complete the previous three questions by doing norton-thevenin source transformations and getting a single voltage source, which let me figure out the appropriate value of I_in for which the diode operates. But...

Homework Statement The forward bias current I in the diode described (silicon p-n junction) varies as a function of the voltage V and temperature T described by the formula I = I_s*|e^[(|e|*V]/[n*k_b*T]) - 1| where |e| is the fundamental charge, k_b is the Boltzmann constant, I_s is the...

The following link is a picture of my zener diode set up with variable load resistor. The Source is 15VDC and the first resistor is a constant 330 ohm. When I use 470ohm up to 15Kohm for the Load resistor RL, I get a 6V voltage drop across the diode. However, when I go down to 330 ohm for RL...

Homework Statement A pn junction diode is connected to a Thevenin circuit consisting of a 0-to-1V, 1kHz square wave and 1kΩ resistor. Use piecewise linear modeling to estimate the diode voltage for the low (0V), and high (1V) states of the voltage source. Assume the diode to have an...

I just wanted to see if I am understanding this circuit correctly. Let's say the input voltage (V_in) is 0. This means: 1) no current through the 1000 ohm resistor 2) no 0.7V drop from the base to emitter 3) transistor is pretty much off 4) The circuit is open, thus no current goes through...

I have attached the problem along with the answers. I have a question on both of the questions. For the first question, if the diode is ideal, does that mean it's automatically "forward biased?" The problem statement says "assume the diode is ideal (i.e. has a 0V forward bias voltage)...

I'm a quite confused as to how to analysie a diode circuit How would I go about analysing the following? I know that I need to analyse the circuit with the diode on(short circuit) and off(open circuit).

I am wondering how the waveform of AC voltage measured across a diode would look like? What about the waveform of the resistor connected in series with this diode? Please help .

Homework Statement The attached figure is an illustration of a crude Zener-diode regulator circuit. a) Using incremental analysis, estimate from the graph an analytical expression for v0 in terms of V and Δv. b) Calculate the amount of DC and the amount of AC in the output voltage using the...

I'm looking at some solutions for a problem I found. This link is http://www.etcs.ipfw.edu/~lin/MET487/2011-SumII/Lectures/Hw3_Sols-MET487-Sum2011.PDF It's page 4 problem 3.1. Okay so V_in is given to be 10cos(2∏t), but their graph for V_in makes no sense to me and consequently, V_out...

Homework Statement Use the approximation that the diodes conduct only at the indicated forward voltage. For what values of R is D2 Conducting and not conducting? Homework Equations KCL KVL V=IR The Attempt at a Solution I really am not sure how to approach this problem, as none...

Is the standard equation for drift velocity of electrons also applicable to conduction in, say, a vacuum tube? I assume it is, and if so what is the relation between the drift velocities at the interface of vacuum-metal at the anode of a vacuum diode? The current, electronic charge and Area...

Why is the potential difference across a conducting diode zero?

As we are told in the books，a diode can be conductive by a forward-bias of about 0.7v. Thus,current through the n region is formed by the conduction electrons（free electrons in the conduction band） toward the junction.But in the p region,current is formed by the valence electrons from holes...

Hello. I search, unsuccesfully, the datasheet for this component which is 20 kV diode. If someone has any data about it ...

I use a green laser pointer at night to do astronomy related work. I got a cheap $5 green laser pointer off of ebay, and when it's a warm summer night, the device works fine. However, the second it touches the cold, it fizzles out and gives me almost zero output. My idea was to use a...

Here i am discussing about diode made up of p-n junction. what will happen if we join two ends of diode? Due to diffusion, there is a potential difference across depletion region.if we consider this as a battery(can we do so?) then there will be flow of continuous current through the external...

Hello everyone. Can you tell me if i solve right this circuit? D2 is on off mode so I2 is approximately 0,D1 is the same and D3 is on ON mode so the equivalent circuit is like AFTER. Is it ok what i did? http://postimage.org/image/mblq1dr7n/

Is there any current flow through the diode in this circuit (attached) ? My initial answer was that there was none but then again I just wanted to confirm because all the other questions don't have any current flowing through them either. Looked fishy/

Refer to this graph http://www.reuk.co.uk/What-is-a-Zener-Diode.htm The zener diode First the reverse biased set up then the depletion layer become bigger and bigger because the anode of the battery will attract the electron in n-type , leaving a lot of holes there. For the cathode, it will...

Homework Statement Find voltage at Vo1 and Vo2 The left part is the schematic used in the question. The right side is the engineering schematic I drew up. The Attempt at a Solution I'm not sure what to do here. because there is a Si and Ge diode that means the Ge will be actived first...

Hi, I recently bought 10 Zener diodes the last time I purchase circuit elements. I was wondering if anyone had simple circuits or projects I could do, that needs zener diodes.

Homework Statement Plot the waveforms for capacitor voltage VC, output voltage Vo, and diode voltage Vd given that Vs is a 20 Vpp triangle wave with period T. Use CVD model with diode VON = 0.7 V. Homework Equations KVLs? The Attempt at a Solution From my basic...

Hellow guys! I find this concept really confusing, if the bulk resistance of a diode is an approximation of the I-V characteristic curve for a diode, Why then is that bulk resistance compared to ac resistances of the same diode at a particular operating in calculated values, seem not to...

I wonder: do there exist "magnetic semiconductors" and magnetic diodes and transistors? Normal electrical semiconductors rely on the fact that there are positive and negative charge carriers. Magnetism does not have monopole charges, so it will not be possible to construct an isolated region of...

I’m trying to install some LEDs in my footwells. I have a pink wire, which is my positive, and a gray wire, which is my negavtive. This is a negative switched circuit. So, is it ok to hook it up like this? 1 Positive of LEDs to pink, negative to gray. 2 Then, use a diode on the gray...

Homework Statement Homework Equations When Diode is on Vd=0.7 V and Id=0 When Diode is off Vd<0.7 and Id>0The Attempt at a Solution I've been working on this problem for hours now but I just can't logic it out properly. I know the right model is supposed to be D1 ON and D2 OFF, but I can't...

Good day all, I am looking for a three terminal (zener based) shunt regulator IC that can handle at least 125V. If anyone knows where I can find it please post the url so that i can check the specs. Thank you

I think I sort of understand, does it take all of the voltage in apart from a certain amount? so say you havea 4v zener, does it absorb all the volts but the 4? I've googled it but I really need to ask questions to understand.

I'm given a strange single-diode circuit where you must find out whether or not the diode is on. See the top diagram in the linked image: http://i.imgur.com/y1sn3.png (Current source is indeed 1 Amp, not 1mA as the 2kΩ resistor would suggest. Please do not try to correct the initial question...

hello friends , In zener diode due to high doping ,electric field is very intense .So this electric fields knocks electrons from atoms and reverse current starts flowing during reverse biasing. its said that at the same time it maintains constant voltage . Of which voltage we are talking...

Do u agree with the statement given in picture i have attached about zener diode. i have taken this snapshot from a book on electronic devices.

sorry just found out this is the wrong thread

Hello, I have LED's all over my vehicle. I have them as tail lights, in the climate control,door switches, and several more throughout my car. I have this piece called a HYPERFLASH harness hooked up in the system that was recommended to prevent hyperflash, and it has done a perfect job...

http://www.itisff.it/dip_eln/tda2030.pdf Couple questions. 1. In the Typical Application diagram on the left there is Vi w/ a 22k resistor. Appears that there's a diode running into the resistor and then the resistor goes to ground. The question is how should I interpret that? The...

Dear, In Zener Diode, In highly Doped diode,the breakdown(Zener breakdown) occurs in small voltage.How? Thanks& Regards, Viswanathan.M

Why does the depletion layer penetrate a lightly doped side of a p-n junction diode?? Consider that there is a lightly doped p-side and a heavily doped n-side in a p-n junction diode , which is connected to a dc power supply in reversed biased. Now, I've read that depletion layer penetrates the...

I am told that in this circuit (above pic) we shortcircuit D1 and D2, and disconnect D3 and D4... then we are to calculate Vrl(average) But the way I see it, if we shortcircuit D1 and D2 the entire circuit is shortcircuit and current only flows like this (below pic)...

Hello Can use Carbon to create Diode instead of Silicon-germanium ? if yes why we don't have carbon diode? what is advantages and disadvantages?

In our experiment we measured the forward resistance of a diode using a multimeter. We used that value and the voltage across the diode to compute the current passing through the diode. Is that value really constant??

Dear Experts I just connect a diode to a battery rated at 4.2 volts. The diode takes about 0.8volts ( i thought should be 0.7v but measurement says 0.8v) and the battery is currently at 3.12v. The supply voltage is 5v dc. After some time, if the battery reaches 4.2v, would current...

Hello! So I've been working on a project to couple a 15 bar diode stack into a 600 micron fiber. Using an old design that I've used in the past but it's giving me some issues. I don't have a plethora of experience with ZEMAX so I'm hoping to leverage the collective consciousness of the...

Homework Statement What will be the voltage v(t) across diode D1 ? Homework Equations The Figure is shown in the attachment. The Attempt at a Solution When there is a positive cycle D2 will be open circuit and capacitor 1 will be charged and diode D1 will be short circuited...

General basic electronics questions I have 3 questions QUESTION 1 -------------- http://img35.imageshack.us/img35/4011/zener.jpg No matter what value of R I have, as long as the source voltage (16V in our case) bigger than the zener's diode voltage specification (6V in our case), the...

I need to bias the inputs to a transformer-coupled communications receiver apart by about 100mV. Since the transformer has split windings, one way to do this would be to add a Schottky diode into the center tap, and bias it with a little current (not enough to saturate the transformer). I...