1. LTspice
  2. Повідомлення
Розширений Теми Повідомлення Опитування
Дата
Added Folder /Temp/CD4028 #file-notice

Group Notification
 

spicer <webmaster@...> added folder /Temp/CD4028

Description:
CMOS BCD to Decimal Decoder
Re: Onsemi EliteSiC MOSFET.

 

Hi Richard and Andy,
 
Thank Andy for the help.
Richard, you can find more help to know about our models and how to use them with the following links (and see my comments after those links) :
 
******
 
Physical & Scalable Modeling IEEE Papers
•[1] A Physically Based Scalable SPICE Model for Silicon Carbide Power MOSFETs
https://ieeexplore.ieee.org/document/7931077/
•[2] SiC MOSFET Corner and Statistical SPICE Model Generation
https://ieeexplore.ieee.org/document/9170091/
•[3] A physically based scalable SPICE model for Shielded-Gate Trench Power MOSFETs
https://ieeexplore.ieee.org/document/7520817/
 
Physical & Scalable Modeling help available at onsemi.com
•[1] An Introduction to Physical Scalable Models for Wide Bandgap Power Semiconductor – Part One (Blog article)
https://www.onsemi.com/blog/industrial-cloud-power/wide-band-gap-ecosystem-part-i
•[2] Wide Bandgap Power Semiconductor: Silicon Carbide MOSFET Models – Part Two – (Blog Article)
https://www.onsemi.com/blog/industrial-cloud-power/wide-band-gap-ecosystem-switches-disruptive-environments
•[3] Wide Bandgap Semiconductor Simulation Model Verification – Part Three – (Blog Article)
https://www.onsemi.com/blog/industrial-cloud-power/wide-bandgap-semiconductor-simulation-model-verification
•[4] Physically Based, Scalable SPICE Modeling Methodologies for Modern Power Electronic Devices – (White paper)
https://www.onsemi.com/pub/Collateral/TND6260-D.PDF
•[5] SPICE Modeling Tutorial – (Tutorial)
https://www.onsemi.com/pub/collateral/tnd6248-d.pptx
•[6] Physically Based, Scalable SPICE Modeling Methodologies for Modern Power Electronic Devices – (Video)
https://www.onsemi.com/video/physically-based-scalable-spice-modeling-methodologies-for-modern-power-electronic-devices
•[7] How to use Physical and Scalable Models with SIMetrix, OrCAD and LTSpice – (Application note)
https://www.onsemi.com/pub/collateral/and9783-d.pdf
•[8] Using Physical and Scalable Simulation Models to Evaluate Parameters and Application Results – (White paper)
https://www.onsemi.com/pub/collateral/tnd6330-d.pdf
•[9] Simulate with Physical and Scalable Discrete Models...What could we get ? – (Tutorial)
https://www.onsemi.com/pub/Collateral/TND6329-D.PDF
•[10] Using Physical and Scalable Simulation Models to Evaluate Parameters and Application Results – (Video)
https://www.onsemi.com/video/using-physical-and-scalable-simulation-models-to-evaluate-parameters-and-application-results
•[11] Usage of SIMetrix to Study MOSFETs Thermal Behaviors on Heatsink – (Application note)
https://www.onsemi.com/pub/collateral/and90096-d.pdf
•[12] SiC Simulation for Application Evaluation – (Video)
https://www.onsemi.com/video/sic-simulation-for-application-evaluation
•[13] SiC Simulation – (White paper)
https://www.onsemi.com/pub/collateral/tnd6395-d.pdf
•[14] SiC Simulation – (Tutorial)
https://www.onsemi.com/pub/collateral/tnd6421-d.pdf

 

******************

Richard, I recommend you to read, as a minimum, Application Note (AN) [7] I wrote some years ago. I need to redo the screen captures because our web site has been upgraded since last AN revision.

To understand how our models are build, read AN [4] or IEEE papers. Our models contains all our technology information, that is the reason why they are encrypted. If someone can read the model, he can copy our technology. But it is real SiC equations inside the SiC models and not curve fitting Silicon equations used for SiC. They are longer to simulate but much more accurate.

AN above 7 in the list are examples.

 

I hope it will help you to use onsemi SiC LTSpice models,

Best regards, Didier. 

 
Re: Onsemi EliteSiC MOSFET.

 

That's the one.
 
Andy
 
Re: Onsemi EliteSiC MOSFET.

 

I found an encrypted library file of sic mosfet's.
Re: Onsemi EliteSiC MOSFET.

 

Yah, I checked to find a spice model and concluded that I'd have email tech support, but didn't want to go that route until I got to my desktop, and thought to asks around, because it's my Mom's Birthday, and I was away from my desktop.
Re: importing THS3491 PSPICE caused error in zenner diode model

 

john23 asked, "Is there some manual(video will be great)so  i could use to show the proper way how to generate a symbol so it will be portable?"
 
I do not know if there is a video for this, and sorry but I am not going to make one.  But here are the extra steps:
 
  • Create the symbol using the usual steps on the "Automatic Symbol Generation" help page.  I assume you know how to do that because you made some already.
  • With the symbol still open in LTspice, press Ctrl-A (or go to Edit > Attributes > Edit Attributes).
  • If the symbol is not still open in LTspice, then locate the symbol again (it is probably in LTspice's [AutoGenerated] folder), open it in LTspice, and now press Ctrl-A.
  • The "Symbol Attribute Editor" now appears on the screen.
  • Look for the "ModelFile" attribute.  It is the last one in the list.
  • Double-click on the value in the ModelFile line.
  • Edit it to remove everything before the filename.ext.  The only thing left should be the filename.ext of the SPICE model file that you started with.
  • Click OK.
  • Save it.  (Click the Save icon, or go to File > Save.)
 
That is all you really need to do, to make that symbol portable.  By deleting the "path" to the file's location which exists only on your computer, now it can work on other computers too.
 
Now you need to make sure that the SPICE model file can be found.  A good place to put the SPICE model file, is in the same directory where you are running the simulations that need it.  LTspice can always find it if it's in the same folder with the schematic, if its filename is unique.
 
But that might be a challenge if you plan to be running many simulations located in many different folders.  You can put a copy of the same SPICE model file in each of those folders.  Or you could put the SPICE model file into a specific folder where LTspice always looks.
  • You could put that SPICE model file into LTspice's own lib\sub folder, but I do not recommend it.  Yes it works, but I think it is best to leave LTspice's own lib\sub folder with LTspice's own model files only.  Your added model files ought to go somewhere else.
  • LTspice lets you add "Sym. & Lib. Search Paths", which are lists of directories that YOU own and control, and LTspice will check there when it runs simulations.  The SPICE model is a Library file, not a Symbol file, so add it to the Library Search Path.
 
Andy
 
 
Re: importing THS3491 PSPICE caused error in zenner diode model

 

Hello, regarding what you said.
Is there some manual(video will be great)so  i could use to show the proper way how to generate a symbol so it will be portable?

https://www.ti.com/lit/zip/sbombp9
Thanks.


On Sat, Jul 20, 2024 at 11:02 PM, Andy I wrote:
It is already challenging for us because you auto-generated some symbols,
Re: Onsemi EliteSiC MOSFET.

 

Richard, just in case you are not familiar with onsemi's product webpages:
 
Start at the product webpage.  For the NTHL015N065SC1, that would be here.
 
Then click "Technical Documentation" which is one of the tabs on the large black band, part way down the page.  This reveals much information.  Scroll down until you see something that looks like "SPICE" or "Simulation" or "Model".  (But not the "CAD Model", which is the physical package model.)  Beneath it, it shows all the SPICE or SPICE-like models for the part which can be downloaded directly without any sweat - no need to request it, no need to sign away your rights to a fulfilling life or anything like that.  Also they list Application Notes and White Papers which might be handy, but don't waste too much time on those if all you need is the SPICE model.
 
I can't promise that all onsemi product webpages work this way, but most of the ones I have visited lately are like this.
 
Andy
 
Re: Norton Noiseless feedback amplifiers. Has anyone modeled them.

 

Somewhat off-topic:
 
Nils wrote, "Also the schematics don't even identify crossing wires, which would have been easy to do."
 
I think that was not an omission.  I have watched schematic drawing standards change over time.  I believe the way it is done in the book was not uncommon at one point in our history.  I think these are the guidelines for that:
  • Wires that join at a "T" actually connect to one another.  No dot is needed.
  • Wires that completely cross, without a dot, do not connect.  In this one respect, that is the same as LTspice's schematic editor.
  • I don't know if the book has any examples of this, but if two wires cross one another AND there is a dot where they meet, then those wires actually connect at the dot.  But sometimes this was forbidden, and you had to draw it another way at that connection point.
 
It can be uncomfortable seeing old schematics drawn differently than what one is accustomed to seeing.  But the book's technique was actually one of the "norms" at one time.  I grew up learning to use the little semi-circles when one wire crosses another without intersecting.  I still see that done occasionally, in schematics uploaded to this group, where someone uses the "Jumper" symbols to do that.  That is not what the "Jumper" symbol is for, but I guess it doesn't hurt to do that.
 
In older days, I suspect one of the driving forces was the fact that connection dots can disappear (or occasionally spontaneously appear) after schematics have been photocopied several times.  Thus it can be a good thing if your drawing standard doesn't ever use dots.  Today it just feels wrong.
 
Andy
 
Re: Onsemi EliteSiC MOSFET.

 

Well, all the models on that page are encrypted, including the LTspice model and the PSpice model.  That means you can use only the LTspice model in LTspice.  The PSpice encrypted model can only be used in PSpice, so in that sense it is not quite generic.
 
Andy
 
Re: Norton Noiseless feedback amplifiers. Has anyone modeled them.

 

Two papers that provide practical circuits

in this topology class are:

 

A Directional Feedback Amplifier

Zack Lau, QEX Jan/Feb 2001 pp.49-51

 

A New Negative Feedback Amplifier

Victor Koren, RF Design Mag Feb 1989 pp. 54-60

 

 
Re: Onsemi EliteSiC MOSFET.

 

Richard wrote, "Anybody got a spice model of Onsemi's EliteSiC MOSFET. Maybe a NTHL015N065SC1."
 
Did you check to see if OnSemi has one? 
 
I did that now, and I see they have one.  Actually more than one.  Download it.  Chances are good that the PSpice model is generic SPICE.  Chances are very good that their LTspice model works in LTspice.
 
Andy
 
Onsemi EliteSiC MOSFET.

 

Happy Sunday,
 
Anybody got a spice model of Onsemi's EliteSiC MOSFET. Maybe a NTHL015N065SC1.
Re: Norton Noiseless feedback amplifiers. Has anyone modeled them.

 

I think the first book will be very useful. Thanks.

On Sun, Jul 21, 2024 at 2:17 AM, Nils via groups.io
<nilsp@...> wrote:
I uploaded the Nordholt book and a similar publication of him to the files area, if anyone ist interested. 
He explores all possible Feedback variants in a systematic but super theoretical way. There is not one practical example with component values given. Also the schematics don't even identify crossing wires, which would have been easy to do. 
If anyone knows of more practical literature (with actual schematics to simulate) i would be thankful for a hint!
 
Nils
Re: Norton Noiseless feedback amplifiers. Has anyone modeled them.

 

I uploaded the Nordholt book and a similar publication of him to the files area, if anyone ist interested. 
He explores all possible Feedback variants in a systematic but super theoretical way. There is not one practical example with component values given. Also the schematics don't even identify crossing wires, which would have been easy to do. 
If anyone knows of more practical literature (with actual schematics to simulate) i would be thankful for a hint!
 
Nils
Re: Roys OPM Transmission Line Model #T-line

 

It is very simple in that it assumes that all the frequency dependence is due to skin effect and loss tangent.  The loss tangent is assumed to be constant.  It will work fine for any uniform transmission line where those assumptions are valid.  I would expect coax, twin-lead, CAT-5, and twisted-pair to be modeled well.  PCB materials (a mix of fiberglass and resin) can be a little wonky.  Microstrip line where the dielectric is part PCB and part air won't be great at high frequency.

  

On Sat, Jul 20, 2024 at 3:41 PM joroloso via groups.io <joroloso=gmail.com@groups.io> wrote:
Hi Roy,
 
Thank you for sharing the model!
Do you think the OPM Transmission Line model also applies to twisted pair lines, such as Cat.5e and Cat.6a?
Re: Roys OPM Transmission Line Model #T-line

 

Hi Roy,
 
Thank you for sharing the model!
Do you think the OPM Transmission Line model also applies to twisted pair lines, such as Cat.5e and Cat.6a?
Re: importing THS3491 PSPICE caused error in zenner diode model

 

john23,
 
You have not yet uploaded these files:
  • "tssop.s".  Your schematic has a command ".LIB tssop.s" to load that file, but the file is still missing.
  • "abtpnom.lib".  Your schematic has a command ".LIB abtpnom.lib" to load that file, but the file is still missing.
  • "LMH6654.LIB".  It is the SPICE model for the LMH6654 that is on your schematic.  The symbol you created for the LMH6654 shows that the file is located on your computer's drive, here: "M:\ltsims\New folder\LMH6654.LIB".  It needs to be uploaded.  (Either that, or the simulation could be simplified by removing the LMH6654.  Don't try doing too many things at once.)
 
There might be others missing too, but these three were obvious.
 
It is already challenging for us because you auto-generated some symbols, unnecessarily, and every time you auto-generate a symbol, the symbol embeds the exact location of its SPICE model within the symbol.  That makes it not portable to anyone else's computer.  We all need to edit your auto-generated symbol files to remove those exact locations.
 
There was no need to auto-generate a symbol for a zener diode (BZT52C3V6).  LTspice already has a zener diode symbol.
 
There was no need to auto-generate a symbol for the LMH6654.  LTspice already has a generic 5-pin op-amp symbol; it's called "opamp2", and MOST OF THE TIME it has the same pin-order of the SPICE model so it can be used with MOST op-amps.
 
The THS3491 is different because it has extra pins, so a new symbol was needed for that part.
 
Andy
 
 
Re: importing THS3491 PSPICE caused error in zenner diode model

 

Correction: "All LTspice users have the symbol files that came with LTspice."
 
 
Re: importing THS3491 PSPICE caused error in zenner diode model

 
Змінено

john23 uploaded files to an odd location in the group's files.  They have now been moved to a subdirectory of the "Temp" folder, here:
 
Files > Temp > john23 > ths3491 > missing
 
re: "Is there a way i could see if anything will be missing?"
 
It requires thinking about what your have.
  • Every LTspice simulation starts with a schematic (.asc) file.
  • On that schematic, there are several symbols (.asy files).  Symbols are not part of the schematic; they must also be provided.  All LTspice users have the symbol files that came with LTspice.  Any symbols that didn't come with LTspice need to be uploaded by you.
  • Most symbols also have a SPICE model.  All LTspice users have the SPICE models for everything that came with LTspice.  For every component that did not come with LTspice, you must locate and upload its SPICE model.  Some symbols have the name of the SPICE model embedded within the symbol itself, but some do not.
  • Every ".inc" or ".lib" command loads another SPICE model.  Those must be uploaded by you.
Therefore, you need to stop and think, what things do I have in my simulation that were not part of LTspice itself?  What things did I download, or create?  You need to spend a few minutes thinking about what those things are, locating them on your computer's drive, and then including them with the schematic when you upload it.
 
For everyone concerned, the simplest thing to do is to ZIP all those files together into one .zip file - make sure that it is .zip and not anything else - and then upload just that one .zip file.  Upload it directly to the "Temp" folder and nowhere else.
 
If you have access to a second computer, you can do this:
  1. Install LTspice on that second computer.
  2. Do not install any other SPICE symbols or models on it.
  3. Take the .zip file that you created above, copy it to the second computer, unzip it there, and try to run the simulation of that schematic.
  4. If it doesn't work, then you left something out.  Go back and find the missing files and add them to the .zip file.
 
Andy
 
 
1 - 20 з 152265