After all these years ...
Or, phrased a little differently: the condition number of the MNA circuit matrix expresses how sensitive the circuit outputs are with respect to changes in the parameters (components). The condition n
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· #156783
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Modeling frequency dependent inductance and resistance of a toroid primary
I checked, and the paper indeed looks only at the common mode impedance and not at the differential mode. Thus the core excitation and coupling factor related problems are not relevant. The authors wr
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· #156537
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Modeling frequency dependent inductance and resistance of a toroid primary
It would be interesting to see if the simulation also works (and how well) in the time domain. What happens if the excitation level is increased or when the winding currents have a mismatch? One of th
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· #156530
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LTspice 24.1 Beta Available Now
My problem was/is that the default could/can not be overruled, and so I constantly have to copy changed symbols and subs/libs. The change removes a tiresome problem when having more than one workplace
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· #156288
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LTspice 24.1 Beta Available Now
Sometimes, waveform compression distorts in a way that is not immediately expected (a small straight piece in a nicely curved trace). It is a useful option when file size is really hurting, but nowada
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· #156287
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LTspice 24.1 Beta Available Now
Does this allow to get rid of the forced OneDrive rooted top-directory? -marcel
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· #156243
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EDN 1994 Design Idea: Spice does thermal analysis - missing files
Isn't the goal of such simulations to find out how the temperature variation modulates the operating point of the device, thus causing extra distortion? For this to work, the model of these devices (a
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· #156125
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Importing and exporting data from LTSpice to Matlab
Indeed, it can. One must use the *most current GitHub version* because there were issues with UTF-16. LTspice2Matlab supports compressed binary *.raw files. A straightforward way to script getting dat
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· #156082
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LTspice and Matlab Gradient Descent Optimization
Did you look at https://github.com/PeterFeicht/ltspice2matlab already? That would be the first and most difficult step. -marcel
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· #155701
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Impedance of Complex network
I don't understand the question (you said yo read the Help)? The functions Re(x), Im(x), Ph(x) and Mag(x) are available for plotting ("Waveform Arithmetic"). Or is the problem "on the same plot" ? Wha
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· #155551
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Books on SPICE or LTspice
A list of 43 papers and books is now available on https://iforth.nl/iSPICE/iSPICE.html . -marcel
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· #155514
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FET VCA.asc
( It works fine in 17.1.15. ) Just curious: The THD of this circuit is below about 0.14% (shown by an FFT). Is this indeed the performance that is obtainable in a real circuit? The second thing I note
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· #155364
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Issue with the batch mode operation
I have the same problem. Unfortunately, data files are flushed on the discretion of the OS. Although a program can try to "hard flush" a file, it potentially adds quite a few seconds to its runtime. T
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· #155151
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inductor coupling between subcircuits
Maybe having global transformer nodes could work for you? Or make the transformer a subcircuit on its own? A job for .TEXT or AKO ( not tested) ? -marcel -marcel
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· #154982
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Define coupling coefficients for center tapped transformers
#Transformer
On Mon, Jul 29, 2024 at 12:26 AM, Andy I wrote: [...] > > It just requires a little thought. > This is the understatement of the year :--) Defining an LLC transformer (3 windings) with the proper magn
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· #154793
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Putting a .FOUR statement in a measurement script
A summary on the download page saves the time of a backup and possibly a restore. -marcel
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· #154541
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Putting a .FOUR statement in a measurement script
Is it possible to publish release notes on the download page so that we can see which essential improvements a new version will bring? -marcel
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· #154535
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Putting a .FOUR statement in a measurement script
That is some really good news! -marcel
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· #154414
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Putting a .FOUR statement in a measurement script
1. Quite often I don't know exactly what measurements I need, 2. Sometimes a measurement parameter follows from the outcome of the simulation, e.g., the base frequency of say a Colpitts oscillator, 2.
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· #154413
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Putting a .FOUR statement in a measurement script
Yes, I now remember that this is what I did. So that worked at least up to 17.0.37. Frustrating that, it was such a nice and simple method. I don't want to go back to 17.0.37 and lose real improvement
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· #154410
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