transmitterdan / s2spice Goto Github PK

I ran some tests of LIB files created with S2SPICE 1.01 and the new GUI version and the files compare. The GUI version adds some minor formatting that makes the LIB file easier to read, which is nice.

What I did not like is that the installer rebooted Windows without warning. This may be coming from the Microsoft libraries that are installed first. Is there a way to stop this? If not, add a warning about a reboot so that users have time to gracefully close programs.

Hello,

This discussion links to this repository. Further down, there is a zipfile that contains what is probably an ancestor, s2spice.c. I modified that as part of a prototype to make S-parameter subcircuits work in ngspice and would like to make it available in the discussion. Since there are no attribution or license comments, my guess is that its legal status is by default "all rights reserved". May I have your permission for this use? If so, would you like me to add such comments?

Thanks,

Giles

I thought you would like to know your s2spice program works on macOS as well as Linux and Windows

I cloned your project on my Mac running macOS Ventura (13.1) and built it using clang 14 (from Xcode 14.2).
Before building, I had to install wxwidgets using home-brew command
brew install wxwidgets
I had errors with the default cmake files which were corrected by passing --std=c++11 to cmake with
cmake -DCMAKE_CXX_FLAGS="--std=c++11" ..
After that, the recommended Linux build command worked without error.
cmake --build . --config Release
I was able to open the test files and save both the lib and asy files. And the generated files worked with the test schematic using the macOS version of LTspice.

S2SPICE v1.0.1 crashes when trying to open a Touchstone version 2.0 file. Converting the file to version 1.1 works fine. Since the differences between the versions are mainly helpful comments and summaries, should S2SPICE ignore the comments and summaries or use any that are useful, such as 2-port data order and mixed-mode order?

A posting I started over on the ngspice side and you commented on found an issue during verification. I confirmed what Giles Atkinson found using the version of S2spice he used, s2p.exe.

https://www.dropbox.com/s/ujcyn3a7s0qkmcx/s2p.exe

The lib files I created using s2spice-2.0.2-win32.exe have multiple issues as outlined on page 3 of the posting.

Issues I found:

1. Using more or less analysis data points in ngspice versus the fixed number of data point in the lib file causes big issues
2. Group Delay plot magnitude is too high and has artifacts on upper "rabbit ear"

https://sourceforge.net/p/ngspice/discussion/120973/thread/51228e0b01/?page=2

Version 1.0.3 will not run and complains that it can't find the DLL files that are in C:\Program Files (x86)\transmitterdan\s2spice\bin.