Questions tagged [model]
The model tag has no usage guidance.
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Model Microcontroller's Power Consumption
I am currently building a simulator (time-domain model) that includes a System-on-Chip, a constant voltage source and a series resistor.
Current solution:
My initial intuition was to model the SoC's ...
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Simulation model problem
Recently I have downloaded a model from Toshiba's web site and tried to create a simple circuit like in the image below.
The signal on the "V(n002)" point wasn't like I expect. After that, ...
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Question regarding IBIS models
I have the IBIS models for this SY75603 PCIe clock buffer IC.
However, the available IBIS model is only for the SY75603A with 85 Ω outputs; I'm using the SY75603B with 100 Ω outputs.
What should I do ...
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How do I find or calculate BJT parameters for LTspice?
A typical entry line in LTspice's Standard.bjt file contains, e.g.,
.model 2N4126 PNP(Is=1.41f Xti=3 Eg=1.11 Vaf=18.7 Bf=203.7 Ne=1.5 Ise=0 Ikf=80m Xtb=1.5 Br=4.924 Nc=2 Isc=0 Ikr=0 Rc=2.5 Cjc=9.728p ...
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How do I import this OPA313 PSpice model into LTspice?
It's been asked quite a few times how to import PSpice models into LTspice but none of the methods seem to apply to this particular model from TI. I really don't understand what all these files are ...
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Diagram of a simple charge/discharge model of a battery powered by a solar panel with a DC motor load in Simulink
I want to simulate in Simulink a simple electrical system of the following nature: there is a battery powered by a solar panel and a DC motor load.
For example, during the day, the solar panel ...
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How to understand SUBCKT LTSPICE in order to modify an existing IGBT model to another from the same company
I am struggling trying to understand how a IGBT IKW15N120BH6 is implemented through a SUBCKT. The text file includes SUBCKT with functions and parameters, but it is not a typical construction of a ...
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How to extract s2p file from a large-signal model? - ADS
I am working on a RF IC and I wish to extract s2p file from large-signal model (the large-signal model is available in producer company). How can I do that in ADS?
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How to modify s2p file of an IC? - ADS
I have a s2p file of a RF IC which it contains frequency from 650 MHz to 1.1 GHz. I wish to modify s2p model so that two frequency 0 Hz and about 3.5 MHz is added to the s2p file.
How can I do that ...
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Optocoupler Ltspice model
How are the Ltspice library optocouplers modeled? E.g. PC817 has this one:
...
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NMOS level 8 Ltspice model of 2SK4177
After downloading a model from https://www.onsemi.com/design/resources/technical-documentation?rpn=2SK4177, I deleted everything apart from what was between .MODEL and ), so I ended up with a xxx.txt ...
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Can't find the Pspice model for a diode
Last time I had an issue I posted a question and the answer was pretty useful, so it's the time to try to find the answer to a new one.
I don't seem to be able to find the Pspice model for the ...
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Incandescent light bulb in proteus
How to create a simulation model of The incandescent light bulb in Proteus?
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Which capacitor equivalent circuit should I use in an AC PSPICE sim?
I am trying to simulate the frequency response of a buck converter with the specific ceramic caps that I will be using on my board. The goal is to evaluate stability (phase margin).
The OEM does not ...
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Help me find the PSPICE error, please!
I am trying to simulate the frequency response of a buck converter with the specific tantalum caps that I will be using on my board. The goal is to evaluate stability (phase margin).
The capacitor OEM ...
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How to calculate specific heat capacity of film and electrolytic capacitors?
I am trying to build a thermal equivalent model of a capacitor and its ESR in Simulink. I know the heat flow rate going into the capacitor, as well as the thermal resistance value, but I am missing ...
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LTspice create a model with <InstName> attribute as a variable
Don't know if my title was correctly put. Here is what I want.
I am creating a new module. Each time I add new module I get on top of the module X1, ...
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LTspice: Modeling an LED
I'm trying to create a spice model for a Vishay VSLY5940 IR LED (datasheet) and after following a few examples I found online, I'm unable to complete my calculations.
I created a graph in Excel that ...
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BJT: large and small signal models
I am a bit rusty on my BJT circuit analysis and relooking at my college notes I can't remember the cross-over point when you switch between large signal and small signal models.
The large signal model ...
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about ngspice models and libraries
I'm learning ngspice , read almost it's whole documentation but still confused about libraries and models , here are my questions :
where are the default models and libraries that comes built-in with ...
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How can I encrypt an LTspice model?
I need to encrypt an LTspice MOS model in order to distribute it to my students. It is a .model not a .subckt.
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Spectrum Sensing
I am trying to find the maximum range of a directional antenna whose beamwidth can be varied. The goal is to understand if a particular (x,y) user lies within the antenna. The distance between the ...
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Analysis of high Frequency Hybrid-pi model of a BJT
Can someone explain the reason behind this modelling of rx?
I had read in the book: "Microelectronics by Sedra & Smith" that rx is added to model the resistance of the silicon material ...
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Use simulation model in LTspice
I want to simulate a circuit that uses this transistor using the popular simulator LTspice. When I download the simulation model from the link I get a .zip file containing the following two files:
...
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Buck-Boost small signal
I read the paper "Simplified Analysis of PWM Converters Using The Model of The PWM
Switch", and I have some questions about the model of DCM (Discontinuous Conduction Mode) flyback.
This is ...
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Can LTSPICE compile BSIM4 models
While NGSPICE can compile and run BSIM4 models, I could mot find anywhere reference to LTSPICE being able to run these models. Has anyone tried, and saw that it worked, or knows that this will ...
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Is a spice model unique?
i found an SPICE model for a component with diferent parameters than the ones that i found earlier (wich have the same parameters). So i am questioning wether there is a way in wich it is posible (and ...
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TLP383 ltspice XVII model not working because of encryption?
I tried to test the model of the TLP383 in ltspice which I downloaded from toshiba. TLP383
I added it as I always did with my models downloaded from the internet.
But this time ltspice gives me the ...
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How to get an accurate LTSpice model of a real inductor after impedance analysis?
I want to get an accurate model of a real inductor in LTSpice. Therefor I used an Bode 100 Network Analyzer und measured its impedance in a range of 100 Hz to 20 MHz. My idea was to calculate the ...
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LEDs for model ship [closed]
My dad built a model ship and wants some lights - kind of like the attached photo.
His request: Small, the LED must fit in a 1/2 inch space. The LED must be dim and amber in color,, flicker if ...
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SPICE modeling gas discharge tube using state machine and behavioral resistor
A gas discharge tube (GDT) is a state machine which transitions from a high impedance ("normal") state to a low impedance ("glow") state when the potential across its terminals ...
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Representing Capacitors and Inductors with Initial Conditions for use in a Thévenin Equivalent Circuit
Recently I have undergone a project involving a Thermo-Electric Cooler (TEC). I successfully recreated the manufacturer's datasheet curves by simulating the TEC in LTSpice using thermal circuit ...
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Having trouble finding LTSpice (or just spice) models
While looking to run some simulations on LTSpice (or others spice solutions) I cannot seem to find a single source of truth for models and LTSpice lacks some common components like ...
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LTSpice subckt error
I want to create a LISN module in LTSpice. For this I tried to make a subcircuit by first adding the RLC components and saving it as lisn.asy. Then I copied the netlist onto notepad and added :-
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where is the /models folder in the eagle directory?
I am reading the EAGLE schematic to spice model tutorial here: https://www.autodesk.com/products/eagle/blog/spice-simulation-part-5-schematic-spice-mapping/
I got stuck on the section of loading a ...
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Model reference adaptive controller
I have designed a model reference adaptive controller for which I have obtained the step response for different values of adaptation gain. I have attached the output graph obtained. Can anyone please ...
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PSpice models for BC547C, BC557C, BF245A, BC548C and BD135-16
I'm trying to make this circuit in OrCAD Capture CIS to simulate it in spice:
I found the resistors and capacitors in the ANALOG library. I also found all the transistors, except Q3, in the ...
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Modelling a fan in Ngspice + KiCad
I'm using KiCad 5.1.7 and have created a simple circuit just to see what happens.
It contains a fan, an unpolarized capacitor (110 μF) and a VSource. [Just wondering what happens...]
When I try to ...
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What are examples of complex communication protocols that do not need a 7 layer OSI model to describe them? [closed]
I am trying to dissect an existing design of a custom communication protocol that uses infrared pulses to communicate between only two devices. The design has dozens of small RTL modules, but there is ...
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pi model of common collector
I don't know to retrieve the \$r_\pi\$ value of common collector .
re model (or pi model) for common emitter configuration
Ok for \$r_\pi\$ model from common emitter with
,
and
re model for common ...
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How to use an encrypted HEX file in LTSpice?
I have downloaded a model of a MOSFET from ON Semiconductor and have a problem with it. The "model" looks like this:
...
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Relationship between torque and back-EMF voltage | BLDC motor modeling
I want to simulate an BLDC motor, so I am studying corresponding mathematical model. My problem is that I am little bit confused by the torque equation.
\$e_a\$, \$e_b\$, \$e_c\$ - Back-EMF voltages (...
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how can I simulate the MMA7361L?
I wanted to know if there is a simulator that could include the model of the capcitive accelerometer NXP MMA7361L, and if there is a tool-box in matlab that could include it or should I find the ...
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How can I model an optical filter using python?
Say I have an RGB LED which transmit intensity modulated signals, at one symbol transmission I want to send a symbol with all three chips.. Can I just model three bandpass optical filters like RF ...
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What is the purpose of this disk over a Samtec connector?
With beautification in mind I decided to attach 3D-STEP models to elements on my PCB.
One of them is a connector from Samtec. They do provide a STEP models for a download, but it was immediately ...
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Confusion with non-ideal current and voltage source models
I have a confusion with the following explanation of non-ideal voltage and current sources:
These above doesn't look like the Thevenin or Norton models since the plots are non linear.
Can someone ...
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What does macromodel mean in this context?
I was looking for the meaning of IC "macromodel". And I came across the following:
They call the above schematics of the opmap IC as its "macromodel".
But what is modelled here? They show all the ...
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Frequency response of accelerometer MMA7361L
In order to create the model of the MEMS accelerometer MMA7361L I'm going to need the frequency response of it, but I don't have access to the university lab to use the oscilloscope because of the ...
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Center tapped transformer equivalent circuit model
What is the correct equivalent circuit model of an arbitrary center tapped transformer? i.e. I simply want the equivalent circuit model with has to look something like this:
In center tapped the ...
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I need to make a connection between two devices, who can help me? [closed]
During the Corona era, it's not always easy to keep distance from each other. However, you still have to stay a metre and a half away from each other.
This is why I want to create a device that hangs ...
