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Qucs Changelog

What's new in Qucs 0.0.19

Aug 7, 2017
  • Qucs:
  • Update translations for various languages
  • Fix diagram color picker button ([#30])
  • Fix zoom in a box ([#31])
  • [NEW] Command line to save schematic as image (png, svg, pdf) ([#32])
  • [NEW] Add component MutualX ([#54])
  • [NEW] Enable anti-aliasing, provide it as option ([#73])
  • [NEW] Add search file on component dock ([PR#86])
  • Fix rendering of component text properties ([PR#87], [PR#98])
  • [NEW] Add recently opened menu ([PR#95], [PR#207])
  • Fix crash when loading timingdiagram ([#112])
  • Refactor text search dialog ([PR#124])
  • Correct simulator process exit check ([#132])
  • Refactor project manager ([PR#153])
  • Deprecated use of `HOME` environment variable ([#204])
  • [NEW] Enable use of `QUCSATOR` environment variable to override `qucsator` ([PR#209])
  • Fix bug on deactivation (short-circuiting) a component ([#216])
  • Various usability enhancements ([PR#232])
  • Adjust various dialogs for a better table sizing
  • Results of Optimization dialog can be copied to clipboard and pasted as an Equation
  • Fix usage of font metrics in the schematic
  • Fix handling of simulation messages in case a simulation is aborted
  • Add `QT3_WARNINGS` to serve as a reminder of which Qt3 stuff still needs removal.
  • [NEW] Redesigned About dialog ([PR#252])
  • Fix context menu texts when pressed over toolbar ([#253])
  • Fix crash when using DC bias annotation with a simulation sweep ([#272])
  • Selection of a wire label would change the font elsewhere in the schematic ([#467])
  • Fix crash when changing background color ([PR#456])
  • Changing in Qucs Home no longer requires a restart ([PR#456])
  • Fix the "Open recent Files" which was not updated after save-as ([PR#444])
  • Fix issue that allowed to create projects with an empty name ([#311])
  • Update authors and date in the About dialog ([PR#427])
  • Remove non-GPL Verilog-AMS models: HICUM, BSIM, FBH_HBT ([#421])
  • Fix typo in Voltage Controlled Resistor ([PR#406])
  • Fix keypad up/down on component dialog ([#319])
  • Fix crash when reloading Verilog-A symbols ([#478])
  • Fix matching circuit tool number conversion ([PR#482])
  • Fix the handling of project names containing `_prj` in them ([PR#486])
  • Remove usage of LANGUAGEDIR, LIBRARYDIR variables ([PR#501], [PR#508])
  • Enable loading unknown components, add sub-circuit place hoder ([PR#507])
  • Fix "Export as image" behavior that was clipping markers on selected diagrams ([PR#523])
  • Improve handling of Octave ([PR#530])
  • removal of hardcoded path
  • override environment variable renamed from OCTAVEBINDIR to QUCS_OCTAVE
  • Fix "Move Up/Down" buttons greyed out in the equation property window ([PR#548])
  • Fix Component search selecting wrong component ([#543])
  • Fix cross-hair behavior of insert wire mode, related to zoom/scrool and RMB click ([PR#504])
  • Qucsator:
  • Fix segmentation fault during noise enabled S-parameter simulation ([#133])
  • Fix regression on tswitch component ([#34], [PR#203])
  • Fix coplanar waveguide formulae ([SF#183], [PR#306])
  • Fix several segmentation faults during fuzzed input ([PR#274])
  • Remove null and free checks ([PR#267])
  • Adopt to standard library in several classes.
  • Enable gcov for coverage
  • Fix S-parameters renormalization formula ([PR#481])
  • Remove non-GPL Verilog-AMS models ([#421])
  • Several fixes concerning rectangular waveguides ([PR#349])
  • Correct CPW formulae in QucsTranscalc and qucsator ([PR#306])
  • Fix regression on EDD component ([#296])
  • Fix several segmentation faults, caught by AFL (american fuzzy lop) ([PR#274])
  • Fix excess phase calculations on BJT device ([PR#493])
  • Fix regression on SVD calculation ([PR#493])
  • Fix turn off behavior of thyristor device when reversed biased ([PR#493])
  • Require automake 1.12 for .ypp->.hpp rules ([PR#515])
  • Disable parallel build of Verilo-A modules, temporary fix to avoid race condition ([PR#575])
  • Qucs-Transcalc:
  • Fix issues with coupled microstrips ([SF#171],[PR#85])
  • Fix coplanar waveguide formulae ([SF#183], [PR#306])
  • Several fixes concerning rectangular waveguides ([PR#349])
  • Correct CPW formulae in QucsTranscalc and qucsator ([PR#306])
  • [New] Qucs-ActiveFilter:
  • Merge new qucs-activefilter tool ([#43], [#300])
  • Qucs-Filter:
  • Port QucsStudio Filter synthesis ([#15])
  • Added quarter wavelength bandpass and notch filters ([#310])
  • Transmission line and the microstrip are available.
  • Qucs-Lib:
  • Fix issue that corrupt netlist for item dragged from the library dock ([#39])
  • Fixed library paths for user library components ([PR#292])
  • Fix crash when creating symbols for unknown components ([PR#399])
  • Fix pin assignment in LM317 regulator ([PR#375])
  • Fix ideal OpAmp model ([PR#371])
  • Add search box to search components in libraries ([PR#303])
  • Fix erroneous preview of symbols when using the searchbox ([#550])
  • Qucs-Rescodes:
  • Ported to Qt4 ([#38])
  • Corrected qucsrescodes command name for Linux ([PR#29])
  • Fix issues in the menu bar and fonts ([#445])
  • Qucs-Help:
  • Fix issue on Qucs-Help leading to fail when searching for documentation files ([#335])
  • Qucsconv:
  • Add further command line help documentation, `qucsconv -h` ([#57])
  • Remove converter for non-GPL Verilog-AMS models ([#421])
  • Documentation:
  • Fix table of contents on Technical.pdf ([#55])
  • Documentation for qucs-active filter ([PR#156])
  • Fix out-of-tree and parallel build for LaTeX documentation in qucs-doc directory ([PR#524])
  • Translations:
  • Updated DE ([PR#128])
  • Setup Transifex for Qucs desktop applications ([PR#357])
  • Port:
  • Ported Diagram classes from Qt3PtrList to QList
  • Port Qt3PtrList to QVector on Diagrans, amonst other improvements
  • Ported Component member variables Lines, Arcs, Rects, Ellips, Texts from Qt3PtrList to QList
  • Miscellaneous:
  • new: top VERSION files shall be used for versioning (Autotools, CMake). TODO, package versioning.
  • new: add tag with the latest Git commit hash: Qucs (About and -v), Qucsator, Qucsconv
  • Move from math.h to cmath.h ([PR#168])
  • Corrected behavior of `--with-mkadms` ([PR#436])
  • Remove ADMS as submodule
  • Add support for preferred number series with ASCO, fix variables search string ([PR#412])
  • Integrate qucs-test into qucs package ([PR#389])
  • New top-level make, make check, make distcheck
  • Simplify Verilog-A compilation rules
  • Enable continuous automated builds (AppVeyor) of Windows binary packages, for test purposes ([PR#561])

New in Qucs 0.0.16 (Mar 18, 2011)

  • The new release comes with an interactive GNU/Octave interface. Support for C++ code export of symbol drawings associated with Verilog-A files, and direct association of symbol drawings to Verilog-HDL, Verilog-A and VHDL code has been implemented. In Verilog-HDL and VHDL subcircuits equations can be used. Syntax highlighting for Octave, Verilog-HDL and Verilog-A syntax in text documents has been added. Pre-compiled VHDL modules and libraries made from user written VHDL code is supported now. There are several new components, such as transistor models NIGBT, HICUM L2 v2.24, HICUM L0 v1.2g and HICUM L0 v1.3, tunnel diode, ideal coupled transmission line and an ideal hybrid. The package comes with a new translation into Kazakh. The equation solver now has a EMI receiver functionality implemented. The qucsconv command line data converter supports now Matlab v4 as an export file format.

New in Qucs 0.0.15 (Oct 16, 2010)

  • Matrix exponentation for integral positive and negative powers available in equation solver. Implemented parameters in Verilog-HDL subcircuits.
  • Introduced global nodes (e.g. subst!) in analogue simulator.
  • VHDL files and subcircuits can handle typed generic variables as parameters.
  • Updated list of available components.
  • New transmission line defined by RLCG values available.
  • Added phototransistor Verilog-A model presented at COMON meeting demonstration. Thanks to Mike Brinson!
  • SPICE 2g6 F, H, G and E polynomial sources are now correctly translated by Qucs-Converter command line tool.
  • Attention: Fixed bug in voltage controlled relais. It represented a negative resistor previously.
  • Publication "Advances in compact semiconductor device modelling and circuit macromodelling with the Qucs GPL circuit simulator" has been accepted for oral presentation at MOS-AK Meeting 2009 in Frankfurt/O. Thanks to Mike!
  • Import dialog has been replaced by complete import/export frontend for the Qucs-Converter command line tool.
  • Allowing VHDL files on schematic with arbitrary in/out signal types.
  • Publication "Modelling of high-frequency inductance with Qucs non-linear radio frequency equation defined devices" at IJE is now online. Thanks a lot to Mike Brinson!
  • Added many new digital primitives defined in analogue, Verilog and VHDL simulations. Thanks to Mike.
  • Publication "Compact macromodelling of operational amplifiers with equation defined devices" at IJE is now online. Thanks a lot to Mike Brinson!
  • Added post install script for MacOSX as well as appropriate icons. Thanks to Dirk for friendly machine support. Please check this installer and give feedback if it works as expected.
  • New digital buffer component added (VHDL, Verilog and analog model).
  • Attention: Fixed severe bug in time switch. It represented a negative resistor previously.
  • Merged NMOS and PMOS models of Verilog-A EKV v2.6 MOSFET model.
  • Allowing parameter sweep and other variables in constant parameter simulation boxes.
  • Added new report chapter about the Verilog-A photodiode model contributed by Mike Brinson.
  • Please note: Set up a little survey. Please take the minute to answer few of our questions.
  • Support of US letter formats for schematic frame.
  • Updated EPFL-EKV v2.6 Verilog-A model report.
  • Implementation of modular photodiode Verilog-A model added. Thanks a lot to Mike Brinson!
  • Added temperature dependent model for gold, copper and stainless steel of rectangular waveguide. Thanks to Andrea Zonca!
  • New HICUM L2 v2.23 Verilog-A transistor model added.
  • Added preliminary implementation of HICUM L0 v1.2 Verilog-A transistor model.
  • Implementation of ddx() operator in equations.
  • Publication "Qucs: A GPL software package for circuit simulation, compact device modelling and circuit macromodelling from DC to RF and beyond" at IJNM is now online. Thanks a lot to Mike Brinson!
  • Simulation time for digital files (Verilog and VHDL) now stored in additional configuration file.
  • Added Czech translations of the internal help system. Thanks to Martin Stejskal.
  • Attention: Fixed bug in the S-parameters of the differential voltage probe.
  • Existing HICUM models can now be converted from SPICE by the QucsConv tool into model library entries.
  • Cotter W. Sayre's RF Design Book "Complete Wireless Design 2nd Edition" has been published. He uses Qucs for demonstration purposes about how it can be used to design RF devices. Have a look here.
  • New component: rectangular waveguide. Thanks to Bastien!
  • Added noise figure property to amplifier model.
  • New Verilog-A devices EPFL-EKV NMOS/PMOS V2.6 implemented. Thanks a very lot to Mike Brinson! Also added an appropriate ReportBook chapter.
  • Added new varistor (EPCOS) library. Thanks to Gunther Kraut!
  • Improved overview about unofficial (binary) Qucs packages.
  • New library containing some voltage regulators like, e.g., LM140 added.
  • Added three more libraries: NMOSFETs, PMOSFETs and Ideal. Thanks to Gunther Kraut.
  • Publication "Interactive compact device modelling using Qucs equation-defined devices" at IJNM is now online. Thanks a lot to Mike Brinson!

New in Qucs 0.0.14 (Oct 16, 2010)

  • Publication "Qucs: A GPL software package for circuit simulation, compact device modeling and circuit macromodeling from DC to RF and beyond" has been presented during MOS-AK Workshop 2008 in Eindhoven. Thanks to Mike for taking the time and his valueable contribution.
  • New Verilog-A models: MESFET (Curtice, Statz, TOM-1 and TOM-2 included). Thanks a lot to Mike Brinson! Also added an appropriate report chapter for the model documentation.
  • Added coplanar lines (w/ and w/o backside metalization) to the Qucs Transcalc tool.
  • Finally fixed printing under Win32. Choosing AllPages/Selection is now properly working. Thanks to Christian Ehrlicher!
  • Fixed printing (font sizes) under Win32 using some work-arounds for current Qt3 implementation.
  • Also implemented 2-port equation defined RF device including H-, G-, T- and A-parameters (all hybrid).
  • Preliminary implementation of multi-port equation defined RF device (RF-EDD). S-, Y- and Z-parameters available.
  • New component: Potentiometer Verilog-A model. Thanks a lot to Mike Brinson!
  • Support for sub- and super-script in graphical text paintings.
  • New components: Thyristor (SCR) and Triac.
  • Added new Verilog-A transistor model HICUM L0 v1.12 to the available components. Both npn and pnp types seem to work properly.
  • New component: Logarithmic Amplifier Verilog-A device. Thanks to Mike Brinson! Added a report chapter about the new component, also provided by Mike Brinson.
  • Implemented 3- and more argument versions of PlotVs() in the equation solver.
  • Added working Diac implementation.

New in Qucs 0.0.13 (Oct 16, 2010)

  • Added new Verilog-A transistor model HICUM L2 v2.22 to the available components.
  • New component: Modular Operational Amplifier Verilog-A device. Thanks a lot to Mike Brinson! Also added a new report chapter about this new component.
  • Added simple Smith chart example provided by Fredy Konig. Also added optional third argument to unwrap().
  • New functions in the equation solver: StabMeasure() for the stability measure B1 of a 2-port network and StabFactor() as an alias for Rollet().
  • New radiometer model added to the example section (provided by Andrea Zonca).
  • Added new example provided by Fredy Konig showing how to use AC and S-parameter simulations and some equations to obtain the group delay of a Butterworth filter.
  • New component: file based current source. Added gain and delay parameter to both file based sources.
  • Allowing immediate vectors [v1, v2, ...] and matrices [m11, m12, ...; m21, m22, ...] in equations.
  • New functions added to the equation solver: random() and srandom().
  • Poster Interactive Compact Device Modeling Using Qucs Equation Defined Devices presented during ESSDERC/ESSCIRC MOS-AK Workshop in Munich by Mike Brinson. Thanks for coming from London.
  • Allowing engineering notation of numbers (e.g. 1u instead of 1e-6) in equations (pre- and post-processing as well as EDD).
  • Qucs-Converter command line tool allows export of Touchstone data files.
  • Poster contribution "Interactive Compact Device Modeling Using Qucs Equation Defined Devices" has been accepted for MOS-AK/ESSDERC/ESSCIRC Workshop 2007 in Munich. Thanks to Mike and Wladek.
  • CSV files files can be converted into Qucs datasets with the Qucs-Converter.
  • New component: file based voltage source. Thanks a lot to Gunther.

New in Qucs 0.0.12 (Oct 16, 2010)

  • Also updated the technical documentation.
  • New tutorial: Component, compact device and circuit modelling using symbolic equations. A thousand thanks to Mike for this great piece of work. Updated the WorkBook.
  • New report: Curtice level 1 MESFET model published. Thanks to Mike Brinson.
  • Preprocessor selectable in SPICE file component.
  • Added new vt() function (thermal voltage) and also made "q" (elementary charge) a constant in the equation solver.
  • Implementation of mutual inductances with a virtually unlimited number of inductors. Available in the SPICE to Qucs conversion program.
  • Added Ukrainian translations. Thanks to Dystryk.
  • Component library can now contain analogue as well as digital (Verilog and VHDL) subcircuits.
  • FreeHDL (used by Qucs for digital VHDL simulations) has finally been accepted in Debian.
  • New hypot() and limexp() functions in the set of available operations.
  • Added arcsec(), arccosec(), arsech() and arcosech() functions to the equati$ solver. Also support for logical and rational operators as well as the ternary ?: construct.
  • Support for symbolically defined devices. Explicit equations allowed.
  • Publication "GNU Simulators Supporting Verilog-A Compact Model Standardization" at MOS-AK meeting. Thanks to Mike Brinson and Wladek Grabinski.
  • Two new components: exponential voltage and current pulse sources. Thanks to Gunther.
  • Added Verilog file component.
  • Initiated the ReportBook.
  • Started support for Verilog-HDL using Icarus Verilog as an alternative to VHDL regarding digital simulations.
  • Finished the introductory tutorial Getting Started with Qucs.

New in Qucs 0.0.11 (Oct 16, 2010)

  • Also updated the technical online documentation as well as the appropriate pdf and ps documents.
  • Updated the WorkBook. Added an introductory tutorial.
  • Mike Brinson started a SPICE/Qucs compatibility test.
  • Updated the WorkBook. Added the tutorial update for operational amplifier modelling provided by Mike Brinson.
  • Updated documentation section on homepage. Added some build instructions.
  • Implemented high-injection knee current parameter for the diode.
  • Input parameters of components can be used in equations.
  • Implementation of subcircuit parameters. Allow equation variables and sweep parameters in component properties and subcircuit parameters. Equations can be placed in subcircuits.
  • Improved visualization and selection of graphs and paintings at zoom levels != 1. No more grainy diagrams.
  • Implemented non-ideal microstrip cross junction model.
  • New tutorial "Qucs simulation of SPICE netlists" provided by Mike Brinson. WorkBook has been updated.
  • Two new components: 4-terminal transmission line and twisted-pair line.
  • Implementation of bondwire model. Thanks to Bastien.
  • Using adms to translate Verilog-AMS device models into C++ code for use in Qucs. Two preliminary models for testing purposes: HICUM L2 v2.11 and FBH-HBT. Thanks to Helene Parruitte and Bertrand Ardouin.
  • Added the Russian translation of the WorkBook provided by Vladimir. Thanks a lot!
  • Added the "Modelling the 555 Timer" tutorial provided by Mike Brinson to the WorkBook. Implementation of the excess phase in the BJT model during transient analysis.
  • New Czech translation. Thanks to Marek. Gopala started to port the GUI to Qt4 in a new CVS branch.

New in Qucs 0.0.10 (Oct 16, 2010)

  • Also updated the WorkBook. Added the tutorial update for digital simulation provided by Mike Brinson.
  • Michael decided to quit programming on the GUI for a while. Gopala is going to take this part, hopefully.
  • Preliminary support for analog circuit optimizations using ASCO. Version 0.4.4 required.
  • IC-CAP model files files can be converted into Qucs datasets with the Qucs-Converter. Support of delay, rise and fall times in the rectangular voltage and current sources. Started implementaion of the optimization component.
  • Attenuator design tool by Toyoyuki Ishikawa.
  • Added the "Modelling Operational Amplifiers" tutorial provided by Mike Brinson to the WorkBook.
  • ZVR (R&S network analyzer) ascii files can be converted into Qucs datasets with the Qucs-Converter. A4 page frame can be used in schematics for displaying and printing.
  • Support for nine-valued VHDL logic. Data import and export interface for the command line tool Qucs-Converter. Project package files for data exchange are now supported.
  • Singular value decomposition (SVD) is now available for solving linear (real as well as complex) equation systems.
  • Added the "Measurement Expressions Reference Manual" provided by Gunther Kraut to the WorkBook.
  • Touchstone files as well as CITIfiles can now be converted into Qucs datasets using the command line converter Qucs-Converter. Creating a user library from subcircuits is now possible.

New in Qucs 0.0.9 (Oct 16, 2010)

  • Update of the introductory tutorial about digital simulations. Thanks to Mike. New functions in the equation solver: Time2Freq() and Freq2Time(), also modified the dft(), idft(), fft() and ifft() functions.
  • Anonymous CVS instructions have been updated.
  • Cross-compiling to the mingw32 target using a GNU/Linux box is now possible (both the qucs and qucs-core package).
  • Updated the WorkBook. Added the tutorial about the flip-flop models provided by Mike Brinson. Thanks a lot.
  • S-parameter file component can be open/short during DC analysis. Disabled components are either open or shorted.
  • Harmonic Balance: Non-linear (1-dimensional) balancing using diodes working.
  • New VHDL file component. Hand craftet VHDL components (files) can be used as subcircuits.
  • Harmonic Balance: Linear networks (R, L and C) with voltage excitations (Vac and Vdc) working. Stay tuned.
  • New translations into Russian. Thanks to Igor Gorbounov.
  • Started to implement the Harmonic Balance analysis.
  • VHDL text editor in the GUI for simulating VHDL directly.
  • Updated the WorkBook. Added the tutorial about digital simulation provided by Mike Brinson.
  • Implemented support for delay times of digital components' analogue models during the transient analysis.
  • Again new functions: besseli0(), kbd(), erfinv() and erfcinv().
  • Support for two-argument functions of arctan(), min() and max(). Many new functions for equation solver: step(), besselj(), bessely(), erf(), erfc(), cumsum(), cumavg(), cumprod(), sqr(), polar(), rms(), dbm2w(), w2dbm(), integrate(), dbm(), runavg(), variance() and stddev(). Thanks to Gunther Kraut for his contributions.
  • Conversion of Qucs dataset to CSV file possible using the command line converter Qucs-Converter.
  • New components: AM and PM modulated AC sources, relais and time controlled switch. Transient simulation model of ideal transmission line finally working.
  • Implementation of delay times of controlled sources during transient analysis.
  • New damping factors for AC voltage/current sources available. Frequency independent losses for 'ideal' transmission line implemented. Number of ports in S-parameter component not anymore limited.
  • New functions in equation solver: xvalue(), yvalue() and min(), max() and avg() with range specification. Language can be chosen in the application settings dialog.
  • Implementation of temperature dependencies of resistor. Output of characteristic values (e.g. ErEff or Zl) during S-parameter simulation possible.
  • New components: coaxial line and differential voltage probe.
  • Updated the installer for Win32, the technical online documentation as well as the ready-to-read postscript and pdf document.
  • Also uploaded the preliminary WorkBook.

New in Qucs 0.0.8 (Oct 16, 2010)

  • Support for pure digital simulations using FreeHDL.
  • Preliminary support for (elliptic) Cauer filters in the filter synthesis tool. Thanks to Vincent.
  • Added pure digital components: D-flipflop, RS-flipflop and JK-flipflop.
  • Finished VCD to Qucs dataset conversion in the Qucs-Converter command line tool (necessary for digital simulations using FreeHDL).
  • New component: ideal coupler implemented (can also be used as hybrid).
  • Stefan decided to stay in Munich for a while.
  • Implementation of temperature/area models of existing non-linear device models.
  • New diagrams: Timing diagram and truth table for displaying results of digital simulations.
  • Started to communicate usage of the FreeHDL compiler in Qucs with the developers. FreeHDL is planned to perform digital simulations in Qucs.
  • Implementation of analog models of digital components (i.e. and, nand, xor, etc).
  • Displaying DC bias in schematic possible. Hidden lines in 3D diagram get invisible.
  • Moved tutorials and technical documentation into its own qucs-doc CVS. Thanks to Thierry Scordilis for the initial idea of the "Work Book" and thanks to Raimund for setting up the new CVS tree.
  • Qucs accepted at Fedora Extras. Thanks to Eric Tanguy.
  • Cubic spline interpolation in S-parameter file data possible. Added dft(), idft(), fft() and ifft() functionality in equation solver.
  • New components: mutual inductors and correlated noise sources.
  • Setup automatic CVS logger recording individual file changes in CVS.
  • New tutorial for 10dB coupler design available.
  • New dialog for changing properties of several components concurrently.
  • Some more filter types (Bessel, Chebyshev: band pass and band stop) supported by filter synthesis tool.
  • Many new transistors and diodes for the library manager. Thanks to Leandro Damian D'Archivio.
  • Power and noise matching tool with smith chart (one-port and two-port matching).
  • Setup link for Qucs RPM packages.

New in Qucs 0.0.7 (Oct 16, 2010)

  • Project renaming to "Quite Universal Circuit Simulator" according to Trolltech's request.
  • New library manager for often used subcircuits, devices and substrates. LaTex-like mnemonics (e.g. \alpha or \pm) can be used in diagram labels as well as in graphic texts.
  • Started to add user tutorials in CVS. Thanks to Chris Pitcher. Available here.
  • Qucs package for FreeBSD.
  • Some more mathematical functions: unwrap(), rad2deg() and deg2rad().
  • Updated installer for Win32 according to the 0.0.6 release.
  • Rotated text as well as filenames with spaces finally work in Qt.

New in Qucs 0.0.6 (Oct 16, 2010)

  • Updated technical online documentation as well as the ready-to-read postscript and pdf document.
  • SPICE component eventually available in the GUI.
  • Converter command line tool can now also generate schematic entries for SPICE device models, useful to import device libraries.
  • Nightly CVS snapshot available. Thanks to Raimund.
  • New coplanar impedance step implemented.
  • New coplanar open- and short-circuits as well as series gap added.
  • Component properties can be edited directly on the schematic area.
  • Implemented three-dimensional cartesian diagram and locus curve.
  • Qucs has been accepted at Debian. Thanks to Jose.
  • First installer for Win32 releases done.
  • Updated the technical online documentation.
  • Noise and stability circles available.
  • Start development of transmission line calculator (based on the transcalc application) and filter synthesis program.
  • Implementation of AC and S-parameter noise for all microstrip components fixed.

New in Qucs 0.0.5 (Oct 16, 2010)

  • AC noise analysis finished, all components available.
  • AC noise implementations of all noisy components. Testing in progress...
  • Homepage update. Brought some more screenshots online.
  • Preliminary coplanar line implementation finished. Thanks to Vincent Habchi.
  • Microstrip Tee implementation.
  • Basic AC noise analysis available.
  • Spice netlist converter.
  • New diagrams: Y-Smith and Smith-Polar-Combinations.
  • New components: Operational amplifier, Amplifier and Microstrip Via.

New in Qucs 0.0.4 (Oct 16, 2010)

  • Updated the technical online documentation.
  • Some more example schematics added.
  • AC analysis finished, all components available.
  • Also non-linear transient analysis possible (e.g. JFET and diode).
  • Transient analysis of linear RCL networks.
  • Basic AC simulation features.

New in Qucs 0.0.3 (Oct 16, 2010)

  • Implementation of various microstrip components.
  • New non-linear components: BJT and MOSFET.
  • Implementation of noise analysis based upon noise-wave correlation matrices and S-parameters.
  • Updated homepage and list of available components. Also added online readable documents.
  • Added list of available components on homepage.
  • Non-linear DC analysis possible (e.g. JFET and diode).