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Could you provide an example?
I learned a lot from his Tutorials. Indispensable to get access to unpublished details and understanding electrical engineering solutions.
Requiestat in pace!
2. December 2023 at 16:53 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #8086The QucsStudio Owner’s optimization tutorial extended by the alternative linear regression option.
– solution can be obtained in one-shot w/o iterations
– pointwise error reduction by one order of magnitude
– easy configuration
Full or partial application of linear regression i/o optimization is strongly advised whenever it is feasible.
Zoltan
1. December 2023 at 15:47 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #8083the linreg package…
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1. December 2023 at 15:42 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #8082This is the linear regression package for using in QucsStudio
https://www.iee.et.tu-dresden.de/iee/eb/forsch/AK-Bipo/2019/1-AMS_zhu1_BipAK19.pdf
– Zoltan
14. September 2023 at 14:08 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #7715…and the SCH
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14. September 2023 at 12:57 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #7711This is a v4.3.1 simulation trial with the QucsStudio implemented hicumL2V2p33 (same result with v4.4.2). There are 3 filter boxes on the schematic but neither works. Eqn. filter3 runs fine with the updated v3.3.2 EXE file of Michael.
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13. September 2023 at 14:20 in reply to: Model analysis and SPICE parameter extraction with QucsStudio #7710Apparently, named node variables can not be used in equations. E.g. U=1-VBE.V-VBE.V and similar throws error in the new revisions therefore we are restricted to use v3.3.2. Originally, the same issue existed in v3.3.2 as well until we were sent an updated EXE file (to D. Celi) by Michael. Hopefully, the issue would be fixed from the next release on.
Such an extension would really be a contribution to convenience. Admittedly somewhat more laborious, the present link to Octave is quite powerful. One can easliy read and write data with the provided *.m functions.
Until this proposal is considered it can also be suggested to utillize the log.txt file which can contain even more data. For example the output of the $strobe() functions placed in a VA code is piped to this file. One can access its content by an Octave routine constructed by the User. The reader can collect the data to a *.CSV file which can be converted to a standard *.DAT file by qucsconv.exe. An additional strong link provided by the tool.
Hi Carsten,
The task has a minimum of Re(Z)=0.2 at c1=0 independent of L1. It is confirmed by plotting the analythical result. However computing with real(Z) form simulations a totally different (noisy) plot is obtained. It is not a QucsStudio issue: the same results arise from Octave and Matlab as well. The oscillating optimization results may also have the same origin.
Any idea?
Resent in *.png
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Modify the *.txt extension to *.pdf. This is a weakly determined task.
QucsStudio is able to optimize several parameters at a time.
Today, vectors do not accept symbolic arguments. I reported it some times ago in the Forum.
Hi,
This would really be useful option. Now we have to remake the whole library by adding all previous PLUS the new component(s).
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