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Hi, Marcel: Thank you for the sharing. One thing that's strange is, the coefficient of 's' seems much different than that converted by ChatGPT or Matlab. "1/3.5e6*s + 1" vs. "s + 3.5e6" & "1/0.14e6*s

I added two photos that show how to construct the waveform both in Simulink and SPICE. ( Photos directory /g/LTspice/album?id=301365 ) The key problem is that neither Simulink nor

Do you mean the original author did not belong to this group, but to another group? Or did you mean another member of this group? I understand English is not your native language. This group has been

Hi, Andy. I think you may have misunderstood: "Recently I compiled several models created by another group's member into one single library." "group's" is how you would write it in French, but in

You can send the email address of the member confidentially to the moderators at: LTspice moderators <[email protected]>, so that you can be advised on this subject. -- OOO - Own Opinions only

Do the other models have a copyright of any kind?? Is there anything either in the models or on the page for downloading them, that says they are copyrighted? I think that would be where to start. Do

Hello, Recently I compiled several models created by another group's member into one single library. Moreover, I slightly modified them for my need but I think it could be useful for other people

Hi, Tony: Thank you for your update. you are so kind. For a little while, I was worried that the new version will bring new issue of those 'Don't look up' problems. You give me hope. I am grateful.

I usually just step a parameter: .step param R list 0.1 1k 1meg (Type "s" and put this in the "Edit Text on the Schematic" window that pops up) Now edit the load resistor's resistance value to be

The look-up table has been updated for increased precision. New zip uploaded. -- Regards, Tony

The look-up table has been updated for increased precision. New zip uploaded. -- Regards, Tony

This is my fault, my spreadsheet truncated the number of decimal places in the table. I'll upload a fixed version, presently. Interesting that it was previously accepted without error. -- Regards,

Hi, : I have uploaded the file named '20250318_bootstrap time-based triangle-wave generator for frequency sweep.asc' at temp.

Your are telling LTspice that you want the y-value to be 0.9088 *and* 0.9110 simultaneously at time 1ns. What would be the correct behavior here that universally applies to all use cases? Best

Hi, Same thing with 24.1.4 C:\Users\NAME\Documents\Simulation\ESD\IEC_61000-4-2_Test (1)\IEC_61000-4-2.inc(201): Monotonically increasing value expected. 1.00E-09,0.9088###> 1.00E-09<###,0.9110

Here is a corrected symbol subckt: * block symbol definitions .subckt lamp 1 2 .param lamp_voltage_rating = 120 .param lamp_power_rating = 20 .param start_temp = 20 .param Rstart ?=

Thanks for reply quickly. I tried again a and it works now. Thanks again! Hidehiko.

Is tstart defined? Put curly braces around the expression? Andy

I think I am finished for the day. I rewrote the device file using just a resistor and some equations, but I can't get passed this error "can't resolve .param r=rstart*(1+alpha*(t-tstart))". Files are

The difficult bit is deriving the temperature from the applied voltage, or? the filament current. However, I think you can use a 'backwards'? trick, by defining the temperature as the initial