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Qucs Quite Universal Circuit Simulator
Overview, Status and Roadmap
Guilherme Brondani Torri
FOSDEM 2016 EDA Developer room
Brussels, 30 January 2016
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Qucs /kju:ks/
• Overview – Project background – Package contents – What can you do with? – Demo
• Status – Development – Next release
• Roadmap – Our whishes for the future
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Project background
• Started in 2003 – Michael Margraf – Stefan Jahn
• GPLv2+ • 20+ contributors • 20 languages • Cross-platform • Users
– Education – Research – Hobbyists – Industry
• 2003 … 2016
• Qucs 0.0.18 - Windows
Web counter
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Package contents
• (sort of an) IDE • Schematic capture • Simulation tools
– Qucsator – Optimizer (ASCO) – Icarus-Verilog – FreeHDL
• Data visualization • Equation system • Component library • Design / synthesis tools
• Extensible – Spice import – Verilog-A model builder – Octave/MATLAB
• Dependencies – C++ compiler – Qt4 (with Qt3Support) – Autotools / CMake – gperf / flex / bison – ADMS – LaTex
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Support
• Website http://qucs.sourceforge.net
• Current developers: ~ 6
• Documentation – Help – Tutorial Workbook – Report Workbook – Technical Manual
• SourceForge – Binaries – Git repository (mirror) – Issue tracker – Forum / mailing lists
• GitHub – Git repository (preferred) – Issue tracker – Wiki – Travis CI – AppVeyor – Coveralls
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Tools
• Graphical Interface – Qucs – ActiveFilter – Attenuator – Editor – Filter – Help – Matching – Library – Rescodes – Transcalc
• ~ 170 components
• Command Line – qucs – qucsator – qucsconv
• Third-party and scripts – asco – admsXml – iverilog – freehdl – ps2sp – octave – python
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Projects
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Contents
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Components
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Libraries
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Visualization
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Qucs-ActiveFilter (1)
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Qucs-ActiveFilter (2)
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Qucs-ActiveFilter (3)
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Qucs-ActiveFilter (4)
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Qucs-Attenuator (1)
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Qucs-Attenuator (2)
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Qucs-Attenuator (3)
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Qucs-Help
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Qucs-Matching
Paste into schematicà
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Qucs-Lib (1)
Paste into schematicà
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Qucs-Lib (2)
Paste into schematicà
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Qucs-Lib (3)
Paste into schematicà
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Qucs-Rescodes
Paste into schematicà
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Qucs-Transcalc (1)
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Qucs-Transcalc (2)
Paste into schematicà
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Qucs-Transcalc (3)
Paste into schematicà
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Qucs-Transcalc (4)
Paste into schematicà
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Qucs-Transcalc (5)
Paste into schematicà
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Qucs-Transcalc (6)
Paste into schematicà
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Qucs-Transcalc
Paste into schematicà
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Qucs-Filter
Paste into schematicà
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Command Line Tools • Qucs – schematic
– schematic to netlist – schematic to print – dump components data
• Qucsator – simulator – DC – Transient – AC – AC Noise – S-Parameter – S-Parameter Noise – (Harmonic Balance)
• Qucsconv - converter spice -‐ qucs spice -‐ qucslib vcd -‐ qucsdata qucsdata -‐ csv qucsdata -‐ touchstone citi -‐ qucsdata touchstone -‐ qucsdata csv -‐ qucsdata zvr -‐ qucsdata mdl -‐ qucsdata qucsdata -‐ matlab
• Custom file formats – schematic – library – netlist – data file
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Demo
• Examples – RLC circuit, parameter sweep – 555 timer: macro modeling – Optimization: Band-pass filter – 10 GHz microstrip band-pass filter – Verilog counter
• Development – Verilog-A support / model builder – Ngspice / Xyce front-end
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RLC, parameter sweep
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555 macro model
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Optimization (ASCO)
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Microstrip band-pass filter
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Verilog Counter
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Verilog-A • Includes 53 38 models written in Verilog-A
• Compact models – BSIM 3, 4, 6 (Berkeley) – EKV (EPFL) – HICUM L0, L2 (TU-Dresden) – FBH-HBT (TU-Berlin)
• ADMS (Automatic Device Model Synthesizer) – Verilog-A à XML transformations à “XYZ code”
• Limitations – Subset of Verilog-AMS – Not supported: V(n)<+ … ;
Accellera
license issue
CMC
license issues
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Verilog-A model builder • BSIM6: Qucsator x HSPICE
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spice4qucs: Ngspice / Xyce • Audio amplifier, troubles with Qucsator
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Status • Release 0.0.19 (February 05, 2016)
– Bug fixing, usability improvements, build system cleanup – Ongoing port Qt3Support to Qt4 – New active-filter synthesis tool – Integration of regression tests, qucs-test repository – Removal of non-GPL models – …
• Release 0.0.20 (no due date) – BSIM 6 – New RF models – spice4qucs: Ngspice (XSPICE) and Xyce frontend
• https://github.com/Qucs/qucs/issues/77 • https://github.com/ra3xdh/qucs/releases/tag/0.0.19S-rc3
– Tuner, Gnucap/Gnucsator, make ADMS optional, submit package to Debian, multiple simulators…
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Roadmap (whish list) 1. Simple GUI and simulator
– Refactor/rewrite, (Qt4) Qt5, plug-ins, API… – Standard file formats, exchangeable
2. Powerful circuit analysis tools – Robust algorithms (Eigen, KLU) – API, high level interface (SWIG) – Harmonic-Balance – Large signal S-parameter simulation (LSSP) – EM field simulation / extraction (openEMS, NEC2++) – *SPICE flavors compatibility/converter – Co-simulation (analog + Verilog/VHDL), interface (icarus, GHDL) – Monte-Carlo simulation – Solvers: Ngspice, Xyce, Gnucap, SpiceOpus
3. Design and synthesis tools – Data import / export
4. Industry standard device models – MEXTRAM, VBIC, HiSIM, IGBJT, UTSOI, …
5. Hardware implementation – Layout PCB, device (KiCad, Klayout)
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Resources • Website: http://qucs.sourceforge.net/ • GitHub (preferred): https://github.com/Qucs/qucs/ • SourceForge: http://sourceforge.net/p/qucs/git/ • Mailing lists: http://sourceforge.net/p/qucs/mailman/ • IRC channel: #qucs • Forum: http://sourceforge.net/p/qucs/discussion/ • Bug trackers:
– https://github.com/Qucs/qucs/issues – http://sourceforge.net/p/qucs/_list/tickets
• Source code documentation: – http://qucs.github.io/qucs-doxygen/qucs/index.html – http://qucs.github.io/qucs-doxygen/qucs-core/index.html
• Downloads: http://sourceforge.net/projects/qucs/files/ • (NEW) Qucs-Help: http://qucs-help.readthedocs.org/ • (NEW) Transifex translations:
– https://www.transifex.com/projects/p/qucs-desktop/ – https://www.transifex.com/projects/p/qucs-help/
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Final remarks
• Flexible and easy to use • Advanced components and features • Build and test infrastructure • Right time for refactoring/redesign • We are open for collaboration • Roadmap: Your help is welcome!