JSIM Superconducting Circuit Simulator

This is JSIM, a Josephson Junction aware spice simulator originally written by Emerson S. Fang as part of his work in Ted Van Duzer's lab at the University of California, Berkeley

Quick Start

If you're new to JSIM, then welcome. JSIM is meant for superconducting simluations of Jospehson Junction based technologies, and does not have the full features that you may be used to in other spice variants. If you're not looking to simulate superconducting circuits, it's very unlikely that you want to use JSIM.

This repository has been updated to use CMake to build, and should work on a wide variety of different architectures. It's known to compile on Mac OSX Sierra and Ubuntu, but should compile on most any unix-like operating system. It is not currently building on windows. Please make your interest known if you would like to run JSIM on windows.

• linux/osx
• win32

Here is the super quick guide to get up and running:

Install CMake, and an appropriate build environment on your system.

git clone https://github.com/coldlogix/jsim.git
cd jsim/vendor/jsim/
mkdir build
cd build
cmake ..
make

This should produce both jsim and jsim_n executables. The jsim_n version includes stochastic noise simulation added by J. Satchell in 1995, and probably will eventually just become part of jsim in this repository in the future.

Branches

This repository attempts to collect and order close to 30 years of variants of the JSIM project. There is an attempt to provide branches for all of the versions of JSIM encountered, and to try to parent them from other branches in an appropriate way such that if you have changes that you've made, you can easily integrate those with the repository and contribute your changes back to the community.

The following branches are available, and their origin and histories are annotated in the log messages for the commits for each of the branches.

• master
• vendor_ortlepp_jsim_n
• vendor_stellenbosch_jsim_n
• vendor_whiteley_jsim_2.0d
• vendor_whiteley_jsim_2.0e
• vendor_yamanashi_pjsim

History

This git repository is an attempt to collect and consolidate all of the various revisions to jsim that have occured over the years and provide one central manageable point for future work on JSIM.

The original thesis from Emerson S. Fang was written in 1989, so there is a very deep and old history for JSIM, with many many people touching and modifying the source over many many years. I have attempted as best as possible to organize and properly parent the various versions I've found in this repository, using branches for each new version I've found.

The various collection formats (tar, zip, raw directories and others) have diverged over the many years, and so the directory structure in the original sources is not always the same across versions of JSIM that I've found "in the wild". I've attempted to checkin the raw versions as close to the formats I've found them in as possible, and then to normalize the versions, hoping that this will make it easier for others to merge any changes that they've made into the repository.

Contributing

If you have changes or enhancements that you'd like to contribute, or suggestions for ways to make this repository more useful to you or others, please feel free to create a pull requests or issue in github, or contact me directly.