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On 21/05/2024 11:46, Leon show wrote:

i want to invert a high level voltage through schmitt inverter , but the data spec show the high level threshold is not as ltspice original setting 50%, so can anyone teach me how to modify the threshold?? where can i give the command or modify the parameter?

You might find this useful:

Help > LTspice > LTspice? > Circuit Elements > A. Special Functions > 1st Section

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Regards,
Tony

Hello, everyone?

i want to invert a high level voltage through schmitt inverter , but the data spec show the high level threshold is not as ltspice original setting 50%, so can anyone teach me how to modify the threshold?? where can i give the command or modify the parameter?

thanks a lot !!!!

(OPA170 PSpice lib file).

Yeah I know that LTspice has several op amps. Probably all are from Analog Devices, right?
I contacted some manufacturers and they replied that they do not have SPICE models.

Thank you very much.

If I search the group's Files for "TIA", several things come up, not all of which are for TIAs.? And that doesn't include transimpedance amps that don't use the "TIA" abbreviation.

If you have a particular TIA model in mind, search our group for the model name to see if anyone else has used it already.

Andy

You asked about making a TIA model from scratch - but did you know that LTspice has some TIAs already?

Also, are you certain that the other manufacturers do not have SPICE models?? Some manufacturers make it challenging to find models when they are there.? Navigating websites has become challenging, IMO.

It is possible to make a generic TIA model, but probably not easy to make one that mimics characteristics of an actual part.? The answer depends on how closely you need the model to approach the actual part.? A generic model would lack things like nonlinear behavior.? Datasheets might not tell you enough about that.? But that's just my opinion.

Andy

I want to build spice models of high speed transimpedance amplifier. There are many? op amps in LTspice simulation. However, I am looking for very high speed TIAs from other manufacturers. They have many but unfortunately there is no spice model. In that case, is it possible to make a spice model of the TIA from the scratch if they provide their datasheets?

Thank you very much.

("AI Detector for ChatGPT, GPT4, Gemini") identifies the (first two) texts as
100% AI-generated (then I got bored). However, I don't think we need scribbr to tell us they're worthless :--)

LinkedIn thinks it has found a way for the AI copyright infringement barrier when attempting to scavenge
deep insights on specialized subjects. They might even have optimized out the 'prompt engineer.'

-marcel

On Sun, May 19, 2024 at 10:14 AM, eetech00 wrote:

On Sun, May 19, 2024 at 03:35 AM, Frank Muenchow wrote:

Thanks eetech00 for porting the model. Unfortunately there's a serious bug, it never works with common mode voltage. I tried a correction

/g/LTspice/files/UCC5304_model_test.zip

Good catch Frank..
I changed the A device "0" reference manually on the outputs but forgot about the inputs.??? :-|
I will update the model, noting your revision, and upload in a day or two.

eT

?Revised 2024/05/20 Model has been uploaded

marcel wrote, "It is definitely written by a human being, because it consistently misspells 'LTspice" (even in the name of the group)."

That might be a mistake that an AI would make, after finding so many other things on the 'net where it is misspelled that way.

The choice in the group's name would have been one person's mistake.? It may have carried over to all the articles too.? Heck, it's even possible that the AI wrote the article spelling it "LTspice", which the group's owner then edited to introduce that error.? It's possible that all individuals involved in that article never actually used LTspice.

Andy

It is definitely written by a human being, because it consistently misspells 'LTspice" (even in the name of the group).

-marcel

cander shelter showed a link to an article at ""

There is considerable misinformation in that article.

It is not clear if the human(s) behind it know what they are talking about.? But I don't think it was written by a real living, breathing person.

The lack of any meaningful useful information suggests that it was written not to inform and educate, but to be clickbait.? It also says that it was written by an AI bot.? And we know what that means.

Andy

Carlos,
VISHAY makes a number of Photovoltaic MOSFET Drivers.
VOMDA1271, VO1263xx & LH1262xx.
They also have spice models available.
Some model files even include the .asy file,
All you need is to take the time and effort to search their web site.
Mike

I don't know if this helps, but are you aware that LTspice comes equipped with a 4n25 model?

Andy

On Sun, May 19, 2024 at 03:35 AM, Frank Muenchow wrote:

Thanks eetech00 for porting the model. Unfortunately there's a serious bug, it never works with common mode voltage. I tried a correction

/g/LTspice/files/UCC5304_model_test.zip

Good catch Frank..
I changed the A device "0" reference manually on the outputs but forgot about the inputs.??? :-|
I will update the model, noting your revision, and upload in a day or two.

eT