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Free Analog Circuit Simulation


SPICE OPUS is a free analog circuit simulator engine specially suited for optimization tools. It is based on UC Berkeley's SPICE 3f4 and Georgia Tech Research Institute's XSPICE. SPICE OPUS is developed and maintained by the Faculty of Electrical Engineering at the University of Ljubljana, Slovenia.

Copyright notice

Copyright (C) 1992 Regents of the University of California.
All rights reserved. Created by U.C. Berkeley CAD Group.

Copyright (C) 1994 Georgia Tech Research Institute
All Rights Reserved.

Copyright (C) 1999 to 2023 The Faculty of Electrical Engineering
at the University of Ljubljana, Slovenia,
All Rights Reserved.

License Agreement

The Copyright holders grant you the right to use this program free of charge for any purpose. Verbatim copying and distribution of the entire software package including documentation is permitted in any medium, provided this Copyright notice and License agreement are preserved.

In any product or research work based on this software, you agree to acknowledge the above research groups which developed this software. This acknowledgment shall appear in your documentation.

Since the program is licensed free of charge, the Copyright holders provide the program "as is" without warranty of any kind. The Copyright holders will not be liable to you for any damages arising out of the use or inability to use this program.