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Hi, Thanks for reacting. I have posted a suggestion on the GitHub page of Qucsator: https://github.com/Qucs/qucsator/issues/50 In the meantime, if someone also needs this function for postprocessing (or device modelling?), this thread can be a good place for letting us know. A few more useful materials to my previous post's mention of existing research about the Lambert W function in the analog electronics domain: "Recent Applications of Lambert's W Function in Nanodevice Modeling Introduction",...

Hi all, A famous mathematical function, often found when it is needed to solve equations with a linear term and either a logarithmic or exponential term, is lacking in the Qucs family: the Lambert's W function. https://en.wikipedia.org/wiki/Lambert_W_function Most numerical computation softwares (Maple, Mathematica, Matlab, Scilab, Octave, Python, etc.) have this feature. Because this function can solve many problems that can be found in electronic circuits involving diodes or bipolar transistors,...

Hi, Check the frequency of the source and compare with the maximum time specified in the simulation. The frequency is too high or the time is too high.

Hi, It seems the DC current of a JFET gate can be very high compred to what it gate resistance should allow. Please see the JFET DC current in the attached document. In the configuration shown in the file, the arrangement may be weird, but why does the simulator thinks the solution is to set the gate DC current to such a high value ? Thanks for your lights!

Hi, It seems the DC current of JFET can be very high compred to what it gate resistance should allow. Please see the JFET DC current in the attached document. In the configuration shown in the file, the arrangement may be weird, but why does the simulator thinks the solution is to set the gate DC current to such a high value ? Thanks for your lights!

In graphic properties, just choose polar axis for S[x,y] parameters instead of Smith axis.

Hi, It's just that the (perfect) current source is doing what you wish it to do: impose a current, whatever the impedance is. Here the impedance of the switch is 1e12 Ohms (OFF), so if you check the voltage you should see 1e11 V!

Hi, Thank you for sharing such an interesting work! Cheers,