| 16 | Mar | 2008 | Added coplanar lines (w/ and w/o backside metalization) to the Qucs Transcalc tool. | |
| 7 | Mar | 2008 | Finally fixed printing under Win32. Choosing AllPages/Selection is now properly working. Thanks to Christian Ehrlicher! | |
| 1 | Mar | 2008 | Fixed printing (font sizes) under Win32 using some work-arounds for current Qt3 implementation. | |
| 21 | Feb | 2008 | Also implemented 2-port equation defined RF device including H-, G-, T- and A-parameters (all hybrid). | |
| 18 | Feb | 2008 | Preliminary implementation of multi-port equation defined RF device (RF-EDD). S-, Y- and Z-parameters available. | |
| 8 | Feb | 2008 | New component: Potentiometer Verilog-A model. Thanks a lot to Mike Brinson! | |
| 1 | Feb | 2008 | Support for sub- and super-script in graphical text paintings. | |
| 25 | Jan | 2008 | New components: Thyristor (SCR) and Triac. | |
| 21 | Jan | 2008 | Added new Verilog-A transistor model HICUM L0 v1.12 to the available components. Both npn and pnp types seem to work properly. | |
| 19 | Jan | 2008 | New component: Logarithmic Amplifier Verilog-A device. Thanks to Mike Brinson! Added a report chapter about the new component, also provided by Mike Brinson. | |
| 18 | Jan | 2008 | Implemented 3- and more argument versions of PlotVs() in the equation solver. | |
| 16 | Jan | 2008 | Added working Diac implementation. | |
| 30 | Dec | 2007 | Released Qucs 0.0.13 ! | |
| 20 | Dec | 2007 | Added new Verilog-A transistor model HICUM L2 v2.22 to the available components. | |
| 13 | Dec | 2007 | New component: Modular Operational Amplifier Verilog-A device. Thanks a lot to Mike Brinson! Also added a new report chapter about this new component. | |
| 2 | Nov | 2007 | Added simple Smith chart example provided by Fredy Konig. Also added optional third argument to unwrap(). | |
| 1 | Nov | 2007 | New functions in the equation solver: StabMeasure() for the stability measure B1 of a 2-port network and StabFactor() as an alias for Rollet(). | |
| 31 | Oct | 2007 | New radiometer model added to the example section (provided by Andrea Zonca). | |
| 30 | Oct | 2007 | 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. | |
| 23 | Oct | 2007 | New component: file based current source. Added gain and delay parameter to both file based sources. | |
| 23 | Sep | 2007 | Allowing immediate vectors [v1, v2, ...] and matrices [m11, m12, ...; m21, m22, ...] in equations. | |
| 19 | Sep | 2007 | New functions added to the equation solver: random() and srandom(). | |
| 14 | Sep | 2007 | 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. | |
| 2 | Sep | 2007 | Allowing engineering notation of numbers (e.g. 1u instead of 1e-6) in equations (pre- and post-processing as well as EDD). | |
| 27 | Aug | 2007 | Qucs-Converter command line tool allows export of Touchstone data files. | |
| 22 | Aug | 2007 | 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. | |
| 16 | Aug | 2007 | CSV files files can be converted into Qucs datasets with the Qucs-Converter. | |
| 13 | Aug | 2007 | New component: file based voltage source. Thanks a lot to Gunther. | |
| 17 | Jun | 2007 | Released Qucs 0.0.12 ! Also updated the technical documentation. |
|
| 3 | Jun | 2007 | 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. | |
| 2 | Jun | 2007 | New report: Curtice level 1 MESFET model published. Thanks to Mike Brinson. | |
| 31 | May | 2007 | Preprocessor selectable in SPICE file component. | |
| 24 | May | 2007 | Added new vt() function (thermal voltage) and also made "q" (elementary charge) a constant in the equation solver. | |
| 17 | May | 2007 | Implementation of mutual inductances with a virtually unlimited number of inductors. Available in the SPICE to Qucs conversion program. | |
| 10 | May | 2007 | Added Ukrainian translations. Thanks to Dystryk. | |
| 9 | May | 2007 | Component library can now contain analogue as well as digital (Verilog and VHDL) subcircuits. | |
| 7 | May | 2007 | FreeHDL (used by Qucs for digital VHDL simulations) has finally been accepted in Debian. | |
| 3 | May | 2007 | New hypot() and limexp() functions in the set of available operations. | |
| 29 | Apr | 2007 | Added arcsec(), arccosec(), arsech() and arcosech() functions to the equati$ solver. Also support for logical and rational operators as well as the ternary ?: construct. | |
| 21 | Apr | 2007 | Support for symbolically defined devices. Explicit equations allowed. | |
| 20 | Apr | 2007 | Publication "GNU Simulators Supporting Verilog-A Compact Model Standardization" at MOS-AK meeting. Thanks to Mike Brinson and Wladek Grabinski. | |
| 15 | Apr | 2007 | Two new components: exponential voltage and current pulse sources. Thanks to Gunther. | |
| 10 | Apr | 2007 | Added Verilog file component. | |
| 9 | Apr | 2007 | Initiated the ReportBook. | |
| 30 | Mar | 2007 | Started support for Verilog-HDL using Icarus Verilog as an alternative to VHDL regarding digital simulations. | |
| 21 | Mar | 2007 | Finished the introductory tutorial Getting Started with Qucs. | |
| 18 | Mar | 2007 | Released Qucs 0.0.11 ! Also updated the technical online documentation as well as the appropriate pdf and ps documents. |
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| 17 | Mar | 2007 | Updated the WorkBook. Added an introductory tutorial. | |
| 9 | Mar | 2007 | Mike Brinson started a SPICE/Qucs compatibility test. | |
| 6 | Mar | 2007 | Updated the WorkBook. Added the tutorial update for operational amplifier modelling provided by Mike Brinson. | |
| 3 | Mar | 2007 | Updated documentation section on homepage. Added some build instructions. | |
| 1 | Mar | 2007 | Implemented high-injection knee current parameter for the diode. | |
| 24 | Feb | 2007 | Input parameters of components can be used in equations. | |
| 21 | Feb | 2007 | Implementation of subcircuit parameters. Allow equation variables and sweep parameters in component properties and subcircuit parameters. Equations can be placed in subcircuits. | |
| 9 | Feb | 2007 | Improved visualization and selection of graphs and paintings at zoom levels != 1. No more grainy diagrams. | |
| 5 | Feb | 2007 | Implemented non-ideal microstrip cross junction model. | |
| 24 | Jan | 2007 | New tutorial "Qucs simulation of SPICE netlists" provided by Mike Brinson. WorkBook has been updated. | |
| 23 | Jan | 2007 | Two new components: 4-terminal transmission line and twisted-pair line. | |
| 20 | Dec | 2006 | Implementation of bondwire model. Thanks to Bastien. | |
| 31 | Oct | 2006 | 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. | |
| 18 | Oct | 2006 | Added the Russian translation of the WorkBook provided by Vladimir. Thanks a lot! | |
| 15 | Sep | 2006 | 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. | |
| 4 | Sep | 2006 | New Czech translation. Thanks to Marek. Gopala started to port the GUI to Qt4 in a new CVS branch. | |
| 1 | Sep | 2006 | Released Qucs 0.0.10 ! Also updated the WorkBook. Added the tutorial update for digital simulation provided by Mike Brinson. | |
| 31 | Aug | 2006 | Michael decided to quit programming on the GUI for a while. Gopala is going to take this part, hopefully. | |
| 30 | Aug | 2006 | Preliminary support for analog circuit optimizations using ASCO. Version 0.4.4 required. | |
| 21 | Aug | 2006 | 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. | |
| 31 | Jul | 2006 | Attenuator design tool by Toyoyuki Ishikawa. | |
| 25 | Jul | 2006 | Added the "Modelling Operational Amplifiers" tutorial provided by Mike Brinson to the WorkBook. | |
| 17 | Jul | 2006 | 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. | |
| 3 | Jul | 2006 | 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. | |
| 1 | Jul | 2006 | Singular value decomposition (SVD) is now available for solving linear (real as well as complex) equation systems. | |
| 9 | Jun | 2006 | Added the "Measurement Expressions Reference Manual" provided by Gunther Kraut to the WorkBook. | |
| 6 | Jun | 2006 | 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. | |
| 29 | May | 2006 | Released Qucs 0.0.9 ! | |
| 24 | May | 2006 | 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. | |
| 15 | May | 2006 | 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). | |
| 7 | May | 2006 | Updated the WorkBook. Added the tutorial about the flip-flop models provided by Mike Brinson. Thanks a lot. | |
| 3 | May | 2006 | S-parameter file component can be open/short during DC analysis. Disabled components are either open or shorted. | |
| 2 | May | 2006 | Harmonic Balance: Non-linear (1-dimensional) balancing using diodes working. | |
| 28 | Apr | 2006 | New VHDL file component. Hand craftet VHDL components (files) can be used as subcircuits. | |
| 24 | Apr | 2006 | Harmonic Balance: Linear networks (R, L and C) with voltage excitations (Vac and Vdc) working. Stay tuned. | |
| 17 | Apr | 2006 | New translations into Russian. Thanks to Igor Gorbounov. | |
| 12 | Apr | 2006 | Started to implement the Harmonic Balance analysis. | |
| 10 | Apr | 2006 | VHDL text editor in the GUI for simulating VHDL directly. | |
| 28 | Mar | 2006 | Updated the WorkBook. Added the tutorial about digital simulation provided by Mike Brinson. | |
| 17 | Mar | 2006 | Implemented support for delay times of digital components' analogue models during the transient analysis. | |
| 15 | Mar | 2006 | Again new functions: besseli0(), kbd(), erfinv() and erfcinv(). | |
| 13 | Mar | 2006 | 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. | |
| 9 | Mar | 2006 | Conversion of Qucs dataset to CSV file possible using the command line converter Qucs-Converter. | |
| 2 | Mar | 2006 | New components: AM and PM modulated AC sources, relais and time controlled switch. Transient simulation model of ideal transmission line finally working. | |
| 26 | Feb | 2006 | Implementation of delay times of controlled sources during transient analysis. | |
| 22 | Feb | 2006 | 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. | |
| 13 | Feb | 2006 | New functions in equation solver: xvalue(), yvalue() and min(), max() and avg() with range specification. Language can be chosen in the application settings dialog. | |
| 3 | Feb | 2006 | Implementation of temperature dependencies of resistor. Output of characteristic values (e.g. ErEff or Zl) during S-parameter simulation possible. | |
| 1 | Feb | 2006 | New components: coaxial line and differential voltage probe. | |
| 25 | Jan | 2006 | 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. | |
| 21 | Jan | 2006 | Released Qucs 0.0.8 ! | |
| 17 | Jan | 2006 | Support for pure digital simulations using FreeHDL. | |
| 13 | Jan | 2006 | Preliminary support for (elliptic) Cauer filters in the filter synthesis tool. Thanks to Vincent. | |
| 11 | Jan | 2006 | Added pure digital components: D-flipflop, RS-flipflop and JK-flipflop. | |
| 9 | Jan | 2006 | Finished VCD to Qucs dataset conversion in the Qucs-Converter command line tool (necessary for digital simulations using FreeHDL). | |
| 4 | Jan | 2006 | New component: ideal coupler implemented (can also be used as hybrid). | |
| 2 | Jan | 2006 | Stefan decided to stay in Munich for a while. | |
| 19 | Dec | 2005 | Implementation of temperature/area models of existing non-linear device models. | |
| 5 | Dec | 2005 | New diagrams: Timing diagram and truth table for displaying results of digital simulations. | |
| 1 | Dec | 2005 | Started to communicate usage of the FreeHDL compiler in Qucs with the developers. FreeHDL is planned to perform digital simulations in Qucs. | |
| 24 | Nov | 2005 | Implementation of analog models of digital components (i.e. and, nand, xor, etc). | |
| 18 | Nov | 2005 | Displaying DC bias in schematic possible. Hidden lines in 3D diagram get invisible. | |
| 8 | Nov | 2005 | 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. | |
| 4 | Nov | 2005 | Qucs accepted at Fedora Extras. Thanks to Eric Tanguy. | |
| 19 | Oct | 2005 | Cubic spline interpolation in S-parameter file data possible. Added dft(), idft(), fft() and ifft() functionality in equation solver. | |
| 11 | Oct | 2005 | New components: mutual inductors and correlated noise sources. | |
| 26 | Sep | 2005 | Setup automatic CVS logger recording individual file changes in CVS. | |
| 21 | Sep | 2005 | New tutorial for 10dB coupler design available. | |
| 9 | Sep | 2005 | New dialog for changing properties of several components concurrently. | |
| 25 | Aug | 2005 | Some more filter types (Bessel, Chebyshev: band pass and band stop) supported by filter synthesis tool. | |
| 15 | Aug | 2005 | Many new transistors and diodes for the library manager. Thanks to Leandro Damian D'Archivio. | |
| 12 | Aug | 2005 | Power and noise matching tool with smith chart (one-port and two-port matching). | |
| 2 | Aug | 2005 | Setup link for Qucs RPM packages. | |
| 22 | Jul | 2005 | Released Qucs 0.0.7 ! Also updated the installer for Win32. | |
| 4 | Jul | 2005 | Project renaming to "Quite Universal Circuit Simulator" according to Trolltech's request. | |
| 23 | Jun | 2005 | 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. | |
| 22 | Jun | 2005 | Started to add user tutorials in CVS. Thanks to Chris Pitcher. Available here. | |
| 13 | Jun | 2005 | Qucs package for FreeBSD. | |
| 10 | Jun | 2005 | Some more mathematical functions: unwrap(), rad2deg() and deg2rad(). | |
| 26 | May | 2005 | Updated installer for Win32 according to the 0.0.6 release. Rotated text as well as filenames with spaces finally work in Qt®. | |
| 25 | May | 2005 | Released Qucs 0.0.6 ! | |
| 23 | May | 2005 | Updated technical online documentation as well as the ready-to-read postscript and pdf document. | |
| 17 | May | 2005 | 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. | |
| 13 | May | 2005 | Nightly CVS snapshot available. Thanks to Raimund. | |
| 12 | May | 2005 | New coplanar impedance step implemented. | |
| 2 | May | 2005 | New coplanar open- and short-circuits as well as series gap added. | |
| 24 | Apr | 2005 | Component properties can be edited directly on the schematic area. | |
| 15 | Apr | 2005 | Implemented three-dimensional cartesian diagram and locus curve. | |
| 10 | Apr | 2005 | Qucs has been accepted at Debian. Thanks to Jose. | |
| 30 | Mar | 2005 | First installer for Win32 releases done. | |
| 20 | Mar | 2005 | Updated the technical online documentation. | |
| 15 | Mar | 2005 | Noise and stability circles available. | |
| 9 | Mar | 2005 | Start development of transmission line calculator (based on the transcalc application) and filter synthesis program. | |
| 7 | Mar | 2005 | Implementation of AC and S-parameter noise for all microstrip components fixed. | |
| 2 | Mar | 2005 | Released Qucs 0.0.5 ! | |
| 25 | Feb | 2005 | AC noise analysis finished, all components available. | |
| 22 | Feb | 2005 | AC noise implementations of all noisy components. Testing in progress... | |
| 13 | Feb | 2005 | Homepage update. Brought some more screenshots online. | |
| 4 | Feb | 2005 | Preliminary coplanar line implementation finished. Thanks to Vincent Habchi. | |
| 1 | Feb | 2005 | Microstrip Tee implementation. | |
| 30 | Jan | 2005 | Basic AC noise analysis available. | |
| 2 | Dec | 2004 | Spice netlist converter. | |
| 30 | Nov | 2004 | New diagrams: Y-Smith and Smith-Polar-Combinations. | |
| 25 | Nov | 2004 | New components: Operational amplifier, Amplifier and Microstrip Via. | |
| 15 | Nov | 2004 | Stefan in Munich. | |
| 23 | Oct | 2004 | Released Qucs 0.0.4 ! | |
| 19 | Oct | 2004 | Updated the technical online documentation. | |
| 11 | Oct | 2004 | Some more example schematics added. | |
| 2 | Oct | 2004 | AC analysis finished, all components available. | |
| 25 | Sep | 2004 | Also non-linear transient analysis possible (e.g. JFET and diode). | |
| 19 | Sep | 2004 | Transient analysis of linear RCL networks. | |
| 8 | Sep | 2004 | Basic AC simulation features. | |
| 4 | Sep | 2004 | Released Qucs 0.0.3 ! | |
| 30 | Aug | 2004 | Implementation of various microstrip components. | |
| 10 | Aug | 2004 | New non-linear components: BJT and MOSFET. | |
| 26 | Jul | 2004 | 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. | |
| 25 | Jun | 2004 | Added list of available components on homepage. | |
| 22 | Jun | 2004 | Non-linear DC analysis possible (e.g. JFET and diode). | |
| 3 | Jun | 2004 | Released Qucs 0.0.2 ! | |
| 22 | Mar | 2004 | Qucs is now available under MacOS 10.3 | |
| 26 | Feb | 2004 | Homepage updated. | |
| 8 | Dec | 2003 | Released Qucs 0.0.1 ! |