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1000 Threads found on edaboard.com: Equivalent Diode
Dear all Electronics Engineers, Kindly I have a question which is very important for me, so pleas, pleas advice and help me... I have to repair a transceivers work in 5.8GHz and 5.4 GHz rang, I found the faulty component, it?s a surface mount diode (it has a cathode label as I draw it in the picture but it?s not that clear, and I take a
im doing pk2 lite blueroomelectronics pic programmer. can any one tel me the equivalent diode for BAT 41 and in5817
hi, wat is the model, that is, equivalent model used for diode in the simulation softwares??? ex. pspice... and moreover for perfect modeling of a simple diode i came to know that there are more than dozens of parameters to be considered... is there any model existing for a diode( which is supposed to be the simplest of (...)
I have a tv sharp 14lk10 and one diode of the power supply is open. In the body of it is printed SV 03 82 please if you can help with an equivalent. rgds marco antonio
Dear all, what is the equivalent of BAY61 diode? can i use 1N4007 instead of it? thanks all.
Hi, Somebody can indicate a zener diode equivalent to BZX 70018? Thank you, Bruno
I need to find the equivalent replacement of mv2109 varactor diode.which parameter i should consider while selecting the replacement? I am looking for component in digikey & mouser. So please help me to find the available replacement from the supplier. I need this varactor diode for my FM stereo transmitters circuit (BH1417)... (...)
AC equivalent circuit is used in ac analysis. For example, the MOS transistor is not linear, if we want to analyze it, we must use linear equivalent circuit . But the dc equivalent circuit and ac equivalent circuit of MOS transistor are not same. So we use them in different analysis.
Does anyone know the equivalent symbol for a LED? What kind of load is it actually? MrEd
You can measure only an equivalent capacitanceof a component without knowing what exactly contributes to this capacitance. I would build a LC generator based on a couple of pnp transistors, so both the inductance and capacitance are related to GND. Now, this oscillator will generate a sine wave of certain frequency. As you add a diode (through a c
Hello, I am feeding an input sine signal of around 10MHz into a circuit that includes a diode. The signal is fed via a 50 Ohm source, cable and PCB connector. If I want to match the impedance of the source to the circuit how do i calculate the equivalent capacitance and resistance of the diode so i can include them in the calculation (...)
hi all plz give me an equivalent for hep 154 silicon diode
munich1806, Test current is the current at which the zener breakdown voltage and equivalent internal impedance specifications are guaranteed. Currents higher than the test current result in slightly higher breakdown voltage and lower internal impedance. Conversly, currents lower thatn the test current result in slightly lower breakdown voltage a
consider a current source of current I=gm*Vgs and the drop on this source is Vgs then the equivalent resistance seen is R=V/I=Vgs/(gm*Vgs)=1/gm
hi, I = Is( exp(Vd/nVT) - 1) ---------------eq.1 where I is the diode current, IS is a scale factor called the saturation current, VD is the voltage across the diode, VT is the thermal voltage, and n is the emission coefficient, also known as the ideality factor. The emission coefficient n varies from about 1 to 2 depending on th
btw are u looking the energy band level details then get back to me, I want the actual reason of the -ve resistance in tunnel diode. I know the equivalent circuit already, but I want to know what actually happen that in -ve resistance area by increasing voltage current decreases.. (there might be holes, electrons and io
Hello, You can reduce the batteries and R's to its Thevenin equivalent. After that use the diode model you like: Ideal, Constant Voltage, Constant V and R drop or any non-linear equivalent. Hope this helps and kind regards!
* * MEASURED TRR = 36.8NS, SIMULATED TRR = 27.00NS. * * TEMP: 125 .MODEL D1N5806/125C D ( + IS = 1.82094E-8 + RS = 0.1187774 + N = 1.6444874 + TT = 2.96E-8 + CJO = 3.15091E-11 + VJ = 0.4 + M = 0.2078398 + EG = 1.11 + XTI = 3 + KF = 0 + AF =
To qoute can be seen in figure 1 that the source metallization connects both the N+ and P implantations, although the operating principle of the MOSFET only requires the source to be connected to the N+ zone. However, if it were, this would result in a floating P zone between the
Hello Frnds, I am designing a cooler circuit for Laser diode. For that an important component i.e a resistor is not available. It is a low ohmic resistor and its value is 0.068ohms. Can there be any alternative for it. Since it is a temperature dependent circuit using a wire of that much resistance will not be futile.. Kindly s
I am trying to create an electrical model of a PV solar pannel. Lot of documents give the equivalent model which is composed of a current source, a diode and 2 resistors. Typical I = f(V) of a solar pannel is described as the following
HI, a reverse biased diode is at the break-down voltage similar as a zener, but not the same... You can not have it at the specific (from you wished) voltages & these break-down charactaristic is a "lavina effect"_ not equivalent with a Zener stabiilizing, its practically unconrtrollable, and so very dangerous for the semiconductor. :-( K.
you can use hardwire connection for the diodes which are ON and no connection for the diodes which are OFF Added after 4 minutes: i.e. for each reconfigurable state you should replace diodes with ideal connection. If you want to be more precise, you can use the equivalent circuit model for the ON and OFF
1. You can use the simulator to calculate the average power and total absorbed energy during the oparation cycle. It would be much more precise than guessing based on a number of screenshots. 2. Some manufacturers have dynamic thermal impedance diagrams, that allow to estimate the maximum junction temperature from the total absorbed energy deter
Could anyone explain what is the purpose of an avalanche diode connected between base and collector of NPN power transistor like in this transistor array chip STA413A? What are these transistors called? I was searching for an equivalent in Digikey, but couldn't find one si
Explain the equivalent Circuit diagram of diode connected Nmos and with formulas.
You can get some some paramaters from I-V curve right? See the pdf attached in the link. They also have made some assumptions. I think you need to do the same. I have one suggestion: see what material & packaging your diode have. Try to find some equivalent component & use its datasheet & model as reference for you. Your problem can b
See page 21 of the same book. there are multiple formulae for the same 'gm'. In one, overdrive is inversely proportional and in one, its directly proportional. Both are equivalent.
please help me the names of equivalent transistors of 2n4401 and 2n4403 also aquivalent of diode 1n914
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Hi, Can you point to me an equivalent to the transistor BU508DFI? Thanks, Bruno
Unfortunately, all four schematics are ignoring the basic requirements of photo diode operation. They only differ by subsidiary details. :sad: The circuits will give some response, but are slow and insensitive. Their AC gain will strongly depend on DC light level. Please refer to the simple input stage circuit linked by dselec as a starting p
Hello, I'm trying to simulate a regulator with designer SI. I'm using lm7805.lib file from pspice model but it has a error about vswitch. Therefore, I want to replace vswitch with equivalent MODEL like mosfet or diode but I don't know how to change. Example) .MODEL SMOD VSWITCH(ROFF=1,RON=1MEG,VOFF=3,VON=3.7) -------> .MODEL (............
Clamp diodes on CMOS are connected to all inputs and to Vdd & Vss. The Schottky diode drop protects the CMOS inputs from see a voltage outside the rails by this diode drop. The only risk is that ESD has been known to be in the order of pico seconds and if the ESD rise time is faster than that of the diode, the (...)
Like thylacine1975, I would suggest to avoid the nonlinear diode model. If you want to use the nonlinear diode model, your amplitudes and waveforms must agree with the amplitude and waveforms in the hardware. This makes your simulation more difficult, and does not add any value to it. Keep simulating linear, and model the diode with ON a
If you shop around Ebay you might find them for <$40, but these packs have 4 large semi's in a hockey puck. I do not have a cookbook design for you on these parts, but they are less expensive and possibly need more gate current. Two or 4 of these[/
Hi, a) I am designing a LC vco and using the varactor shown in fig. 1 where C is mim cap and C2 is diode varactor Resistor sets the node V1 near 0V. b) I want tuning range from 786Mhzz to 800Mhz which requires C to change from 1394f to 1342f i.e. delta_C=52f My doubts: 1. How C1 and C2 and Resistor should be chosen/ratio? I know C1 should b
Thank you all for your suggestions. @Keith : No, actually. The design attached has been prepared by somebody else. I want to go for reduction of components as well. But before that, I wanted to make sure I am able to drive the circuit as per the requirements. As for the laser diode, specifications are not available to us. All that is known is that
Without considering air resistance, fall speed rises linear in time, travelled path quadratically. There's no RLC equivalent for the differential equation. Free fall with air resistance is more complicated. See
Hello, I am looking for an equivalent of the following SMD Schottky diode: BAT60A but with through hole variant to plug it in breadboard do you know any reference? Thank you Michel
Hi, I have a photodiode equivalent like this: 93251 Can I transform this equivalent in a series between a voltage source (Vg) and a resistance (Rg). Because this photodiode is the input of the negative pin of an opamp that work like an integrator to amplify photodiode's signal and I need to calculate the (...)
I have measured the S-parameters (S11) for a Schottky varactor upto 40GHz. I have a desired equivalent circuit model for my device. I would like to extract the equivalent circuit parameters to fit the measured S-parameters. Is there any software (preferably open source) that can help me do this extraction of parameters?
I need to design a single balanced mixer at K band using shottky diodes. I have find some available diodes, to use at this frequencies such as: Skyworks DMK2790 In the Data sheet there is a SPICE model parameter (Fig. 5 table 3) In ADS I created a file with the
Hi. I am looking at using a Silicon Carbide diode as the anti parallel diode across an IGBT. This may be a bit of a simplistic question but: At the moment I am using an IGBT Co-Pack where the IGBT has an 'Ultrafast' Silicon diode as the anti parallel diode. Can I put the SiC diode in parallel with (...)
if you have spice file of the diode, Hello. I have the file of the diode but the results are diferent from the source. My doubt is, he's just using the model of the diode in ADS or he's doing some equivalent circuit?
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I wish to simulate a non linear circuit having a tunnel diode. can any one suggest a simulation tool for it? (I read that APLAC provides Josephson Junction but no ideas about tunnel diode.)
Are there any circuits can measure zener diode's breakdown voltage?
Hi I am building a circuit to be powered by 3.6V. Except one part can only take 2.7-3.3V. Can I use a diode from the +3.6V rail to the VCC of that part ? diode would have say 0.7V drop, so would provide 2.9V to part. Part is SPI interface. I could also use same diodes for the SCK and MOSI lines. MISO would go from part to (...)