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Hello to the community, I'm very interested by the "PTC Thermistors Physical model" found in /g/LTspice/files/z_yahoo/Lib/PTC%20Thermistors/Physical%20model and I have two questions

Use a resistor to set the nominal load and put a current source in parallel. Then use the current source as the input for an AC analysis. Load regulation (and line) varies with frequency and that is

A common way of testing regulators is to use a current source as the load, but a resistor is just as easy. You need to decide what the range of the load current is going to be. Your circuit presently

BTW -- it might not matter -- but it is slightly odd that you used the higher-power BJTs in the low-power part of the circuit, and a lower-power BJT in the high-power part of the circuit.? With JEDEC

I wrote: I meant to write *Bi* -source.? In other words, a B-source with I=<value>.? You can get fancy where the I depends on its voltage, thus turning it into a controllable resistance.? That's

Your uploaded files have very little information. Is the "regulator" the 3-transistor circuit, with R4 being the load at the regulator's output? Can you? describe how you want the load to vary?? Do

Hello ,I am trying to test a voltage regulator by re[lacing a steady resistor with some sort of varying resistor. Given the circuit in the attached Zip file , what kind of "resistor" you reccomend?

Hello to all, I just discovered the discussion. I would be very interested by the SOATherm simulation. I found it crazy that this is almost unusable as there is almost no documentation on it. Does

You're not, by any chance using Linux+Wine, are you? If so, try ctrl-alt-leftclick. Apparently, alt-leftclick is assigned to something else on most Linuxes, even though the alt key alone produces the

Hello, Marcel: At first, it's the ideal in sketch the applied circuitry in s-domain on how to attenuate the surge amplitude. Sometimes, in math domain, possibly solutions will be clear to see, though

after simulation, i do the following: e.g. on a resistor R1, holding alt button and hovering over the element R1 shows in the status bar "Left-click to plot R1 dissipation: ...". but doing so, does

I'm curious as to why you want to (inaccurately) do this in the s-domain? Your equation is available in the time domain, and it perfectly fits the way of working of the EXP() voltage source: Vxxx n+

.asc files are sometimes used in public key cryptography. This might be the reason they are restricted - might be on the IT department's blacklist. Just like there are many types of files you can't

Hi, Tony, Andy: Thank you for your opinions and sharing files. The file uploading issue was not about technical, it's about company policy, they will log the uploaded files, and trace the content

Oops. Zip file updated with symbol. -- Regards, Tony

I uploaded your file for you, in "IEC_61000-4-2_Surge_6KV_ericsson_sunshine.asc" in the Temp folder. It is curious that you can upload a Photo but not a File.? Does groups.io actually allow one but

Be aware that this BV table syntax is broken in LTspice 24.1.x at the moment. We have been assured that it will be fixed in 24.1.6, but we don't know when that will happen. -- Regards, Tony

On 14/03/2025 07:32, ericsson.sunshine via groups.io wrote: > Hi, : > May I ask a question about to generate the surge waveform using time equation & s-equation, on how to do that in LTspice ? > For

Hi, : May I ask a question about to generate the surge waveform using time equation & s-equation, on how to do that in LTspice ? For example, I asked the ChatGPT, about the 6.0KV surge waveform of

Hi. https://www.dextermag.com/wp-content/uploads/2017/03/Dexter_Hitachi_FINEMET-CommonModeChokeCore_2013Sep6.pdf The ferrite you specified is low-frequency. There is a Fe - Feddy parameter in my