Questions tagged [modeling]
This tag covers finding models for electrical and electronic components and circuits
283
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Piezo sensor at resonance - equivalent model
piezo materials are commonly modelled with the BVD model
When the piezo is used as a sensor, they are commonly modelled as a current source in parallel with a capacitor because à external force ...
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2
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Is there a way to take this buck diagram and reduce it to an AC transfer function?
I am semi-dangerous with switchers but I've never really delved into the innards of them so I'd like to ask about this TPS23750 diagram. I would like to develop a model of this feedback loop of a buck ...
- 84.8k
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What kind of model can be used to simulate over- and under voltage in a Li-Battery pack?
So far I have not much experience with modeling in the field of lithium-ion cells or batteries except equivalent circuit models (ecm)-models which I've implemented and used for simulations in Matlab/...
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Modelling of MOSFET
I was wondering if there's a way of creating a simple MOSFET model that predicts how the following circuit behaves when voltage source V is varied.
As I understand it, if MOSFET M1 is in the ...
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Improving Modeling of Thermal Noise in Radio Antennae
Background
I'm attempting to write a physics simulation code, one portion of which involves the simulation of the voltage observed at a set of \$N\$
radio antennae immersed in some medium due to ...
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Distributed-element model of a series-RC transmission line
The equations for modelling most transmission lines can be based off the telegrapher's equations but the ones I found only account for parallel resistance with the capacitance, but I would like to ...
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JFET mismatch between mathematical model and SPICE
As a sequel of this question, I built a mathematical model for the Id current of the following (same) JFET circuit:
For a simplified model, I took LAMBDA=0 and set ...
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Build simple LTspice MOSFET model for textbook examples
I am trying to build a simple MOSFET model (very simple, no parasitic capacitance, gate leakage, ohmic contact...) using LTspice to simulate school textbook example, but I don't know how to switch ...
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Why does the frequency deviation of a FM wave have different definitions?
Source 1 defines the modulation index in the expression for FM as follows:
As per the expression for frequency modulated wave, isn't the frequency deviation same as Modulation index 'M'?
"The ...
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Why are these commercial MESFET model parameters unrecognized by LTspice?
I am trying to add a commercial GaAs FET model (ATF34143) in LTSpice XVII for simulation. The model is provided on this website (http://www.hp.woodshot.com/hprfhelp/design/SPICE/fets.htm#ATF34). ...
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What are NMOS level 1 CV equation and its main parameters?
I was asked to perform MOSFET CV modeling. I looked through some papers, but I still can't clarify what the CV model equation for a level-1 NMOS is, and I am also not sure what its main parameters are ...
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Equation for diode saturation current in photovoltaic cell model
I've been looking for mathematical models for photovoltaic cells. Most of the references I've found use the following circuit to the model the behavior:
Particularly, the diode current is modeled ...
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489
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Can I model a diode with higher than usual junction voltage in LTspice using the "Eg" and "Vj" parameters?
I want to model a GaN transistor and include a diode to simulate its reverse conduction above ~2 V with an adjusted diode using the following model statement:
...
- 22.5k
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Forward diode depletion capacitance formula
Does anybody know the forward depletion capacitance formulas for diodes in spice models?
Background:
The capacitance of a diode in reverse direction usually is dominated by the depletion (or junction) ...
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What is the type of material used for the casing of semiconductors?
I am trying to build some thermal models for leaded and surface-mount diodes and transistors.
Below is a picture of the TO-220 outline I got from the internet. What kind of material is the black part ...
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