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Qucs-S 24.3.2

Bugfixes

  • Fixed editing of File-type properties #948
  • Implemented @model[param] syntax recognition for Parameter sweep #948

Qucs-S 24.3.1

Packaging

  • Stable release packages are now generated autmatically using Github CI #871

QucsatorRF

  • QucsatorRF updated to v1.0.2; See the release notes

Bugfixes and general improvements

  • Improved temperature sweep using unified devices #925
  • Fixed library manger always substitute absoute path #923
  • Fixed stars/circles/arrows plots rendering #892
  • Fixed library devices symbol text rendering #873
  • Fixed touchstones files export from GUI #910
  • Fixed mathicng circuit tool issues #905
  • Implemented SPICE entry for DC block and DC feed #889
  • Fixed Octave start #883
  • Fixed right scroll issue #884
  • Fixed wires selection issue #875
  • Fixed decimal separators processing in attenuator tool #864
  • Fixed shortcut conflict #930
  • Schematic version check checks only major version #931

Libraries

  • Update Optocoupler.lib #846

Localization

  • Updated Russian translation #885

Qucs-S 24.3.0

New features

  • SpiceLibComp redesign. This device is renamed to Spice Library Device and provides an easy way to add SPICE model to schematic and assign symbol to it. See #679
  • Added possibity to import SPICE model for Diode, BJT, MOSFET, and JFET unified devices (blue) #795
  • Implemeted symbol files (*.sym) editing mode. These files are needed to attach symbol to SPICE devices #700
  • Redesign of schematic rendering engine. Improve rendering quality on HiDPI displays #723
  • Improved Qucsconv GUI to reflect new converter features #826
  • Improved libraries portability, relative path support for libraries, show libraries from project directory #567
  • Added a global setting for Ngspice compatibility mode (LTspice, HSPICE, etc.) #851
  • Add global Ngspice compatibility mode (LTspice/HSPICE/S3) setting #851
  • QucsatorRF updated to version 1.0.1

Deprecated features

  • The *.qucs binary archives are not supported anymore. Use system archivers to pack the projects instead #811
  • The SweepModel property of Parameter Sweep simulaiton has been deprecated. It is not needed anymore after Ngspice has added variable sweep feature. Use variable sweep instead #839
  • Toolbars and status bar made always visible #852
  • Icons theme settings removed from settings dialog. These settings have no effect since v2.1.0 when unified and auto-generated icons were introduced.

Packaging

  • Linux DEB and RPM packages switched to Qt6
  • Windows package switched to Qt6
  • Introduced continous release of Linux, Windows, and Mac packages #719
  • Added MacOS package build #797 and homebrew support #804

General improvements

  • The TEMP and TEMPER variables are recognized by parameter sweep to apply temperature sweep #816
  • Fixed ASCO optimization with QucsatorRF #830
  • Enabled variables as parameters for unified nonlinear devices and pulsed source #838 and #808
  • Fixed issues with XYCE simulation #701
  • Improved attenuator synthesis tool #722
  • Improved filter synthesis tool #715 #673
  • Redesign File->Open examples menu. Show open dialog instead of file manager #672
  • Qucs-S now follows XDG standard for cached data location #145
  • Apply .OPTION INTERP when simulating transient with parameter sweep; prevent broken par. sweep data #766
  • Implemented relative paths support for library devices #567

Component library

  • Added PWM controllers (TL494, UC384x, etc.) library #846
  • Added Germanium diodes library #846
  • Added Mixer IC library containing SA612 model #846
  • Added Diodes extended library containing different USSR diodes models
  • Added new Varactor library #759
  • Added new PIN diode library #764

Localization

  • Russian translation update

Qucs-S 24.2.1

This release contains no new features except the fixing of the critical bugs.

General improvements

  • Fixed zero output on DC bias simulation (F8) #667
  • Fixed build failure of the Fedora RPM becuase of RPATH in qucsator_rf

Qucs-S 24.2.0

New features

  • QucsatorRF is now a part of the package; No need to compile and install qucsator manually #370
  • Qucs-RFLayout tool could be launched from Tools menu #465; this tool must be installed separated
  • Redesign of the Qucsconv GUI #647
  • Matching tool backported from Qucs-0.0.20 #401
  • Added RF devices group; backported different RF devices for Qucsator #607

General imporvements and fixes

  • Fixed parameter sweep step issues #186 @ivandi69
  • Fixed SPICE devices bounding box #590 #637
  • Fixed netlist export from CLI #639
  • Fixed parameter sweep simulation with Xyce #624
  • Revert explicit WITH_QT6 compile flag because of cmake bug #592
  • Fixed tuner issues for German locale #416
  • Refactoring in schematic editor #626 #618 @wawuwo

Localization

  • Russian translation update

Qucs-S 24.1.0

Important notes

  • Versioning switched to CalVer. The first digit means year, the second digit means the release number, the third digit means patch number #328

New features

  • Added 3-pin RCD devices #349 to improve support of microelectronics PDKs
  • Improvements of Ngspice support; allowed multiple simulation of the same type #463 by @ivandi69
  • Automatic extraction of THD from FOURIER simulation #525 @ivandi69
  • Nutmeg equations improvements; implemented simulation selection from drop-down list #463 #519
  • Improvements of Nutmeg script simulation type; implemented custom prefixes for plots #476 #435 @ivandi69
  • Export DC OP simulation data to dataset #463 #140 @ivandi69
  • Implemented zoom by selection on the rectangular plots #305
  • Implemeted potentiometer device #122
  • Switched digital simulation from FreeHDL to GHDL #395 @iwbnwif
  • Status bar improvements #493

RF simulation features

  • Added RCLG device support for SPICE #564
  • Added YLIN device support for XYCE #451
  • Fixed touchstone simulation issues for Ngspice #392
  • Added BiasT device support for SPICE #374
  • Added option to disable transient model for RF port #410

Libraries

  • Fixed different issues related to creating libraries #432
  • Added audio IC library
  • Added loudspeaker library #421
  • Added comparators library #436
  • Modified voltage regulators library #433
  • Added voltage references library #439
  • Added thermistor library #538
  • Fixed ideal library #258 #428
  • Fixed transformers library #362
  • Added new devices in SpiceOpamp library #501

General improvements

  • Fixed different tuner issues
  • Schematic zooming improvements #502
  • Different improvements on schematic look and control
  • Added schematic pan mode with the middle mouse button #488
  • HiDPI support improvements including grid rendering
  • Fixed schematic glitches using Wayland #227
  • Added text document zoom and font setting #534

Documentation

  • Added new examples
  • Added Ngspice templates #441
  • The readthdocs documentantion is a candidate for deprecation #554

Localization

  • Added Chinese translation #453 by @hvwyl

Thanks @wawuwo and @iwbnwif for providing refactoring PRs! Many thanks to @tomhajjar for providing libraries, examples and testing.

Qucs-S 2.1.0

New features

  • Added tuner simulation mode #123 (used implementation by @tipofthesowrd)
  • Added support for touchstone s2p file devices for Ngspice #233 (implementation by @transmitterdan)
  • Redesign of the simulation window #309
  • Diagrams are placed on schematic and *.dpl files are disabled by default #309
  • Backport of the active Legendre filter synthesis from Qucs-0.0.20rc2 #318
  • Added SPICE entry for MUT and MUT2 devices
  • Backported circular waveguide and tapered line symbols from Qucs-0.0.20rc2
  • Added zoom to selection mode #327
  • Toolbar icons replaced by SVG; improved look for HiDPI #323 #304
  • Implemented automatic generation of high resolution device icons #334 #304

General improvements

  • Added Tstart option for Spectrum simulaiton #336
  • Added low voltage for VRect source #310
  • Russian translation update #292 #324
  • Added SPICE group for project tree

Bugfixes

  • Fixed simulation of the files with double extension #311
  • Fixed simulation of the files containing unicode symbols #312
  • Fixed display of the Xanalogue.lib library #308
  • Fixed show checker errors for Xyce
  • Fixed load symbol for Verilog-A device #321
  • Fixed component rotation with right mouse button

Library

  • Added thyristor library #212
  • Added optocoupler library #213
  • Added photovoltaic relays library #222

Documentation

  • Added subcircuit symbol templates to share/qucs_s/examples/symbols (by @tomhajjar)
  • Added sections on tuner mode and RF simulation to the Qucs-S tutorial

Packaging

  • Windows 32-bit package is not provided anymore

Qucs-S 2.0.0

New features

  • Implemented quick switch of the simulator without application restart #274 (thanks @Zergud)

Packaging

  • Linux AppImage build switched to Github workflow #281
  • Added Windows 64-bit installer with Ngspice

Component library

  • Fixed issues in Transformers library #228 and #231

General improvements

  • Finished Qt6 porting #190
  • Show warning if the directory protected by Windows UAC #282
  • Fixed PDF print on Windows #285
  • Added option to export grayscale image #288
  • Fixed setting initial conditions in wire labels #291
  • Fixed missing ground warning

Qucs-S 1.1.0

New features

  • Qucs-S supports digital simulation mode using IcarusVerilog or FreeHDL backends #97
  • Added analog model for digital source #265
  • Qucs-S runs DC bias simulation mode if schematic contains DC simulation only #271
  • Selection rectangle update #276

Deprecated features

  • XSPICE CodeModel synthesiszer has been deprected since v1.0.3. The precompiled CM libraries are still supported using spiceinit virtual device. See #204

Known issues of digital simulation

  • Digital buses are not supported;
  • Digital simulation represents its state as of Qucs-0.0.20-RC1; No new features added

Qucs-S 1.0.2

New features

  • Added XSPICE flip-flop digital devices #262 (thanks @Radvall)
  • Added INDQ and CAPQ devices representing inductor and capacitor with Q-factor #143
  • Added .LIB directive support #242
  • Added SPICE entries for I and V file sources #254
  • Added symbols for 4 and 5 terminal BJT device #198

Component library

  • Added behavioral XSPICE 555 timer model #252

General improvements

  • Added option to save SPICE netlist without simulation #225
  • Improved Qt6 compatibility (thanks @Zergud)
  • Improved MacOS compatibility (thanks @nanoant) #214
  • CMake build system update to bring features of the modern CMake (thanks @dsm) #216

Qucs-S 1.0.1

New features

  • Added support for Verilog-A defined devices using Ngspice+OpenVAF #197. Old Qucsator+ADMS workflow is marked as deprecated. Ngspice >=39 is required to support OpenVAF.
  • Implemented variable parameter sweep analysis #189
  • Added possibility to build Qucs-S with Qt6 #190 The -DWITH=QT6=ON option for cmake is required. The source code of the Qucs-S is Qt6 compatible now. Thanks @Zergud !
  • Simulator prefixes like "ngspice/" are not show anymore on plot traces if the plot contains data from only one simulator #178

Component library

  • Added TL071/TL072 opamp models
  • Added 555_timer.lib library containing the 555 timer model
  • Added extended BJT exteneded and Schottky diodes libraries

Bugfix and general improvements

  • Change default RCL device values and simulation settings to prevent convergence error when putting together device with default values #195
  • Fixed auto-scaling issue on Windows 64-bit platform #133

Qucs-S 1.0.0

New features

  • Added basic support for logic gates simulation (Ngspice >= 38) required #97
  • Added possibility to set engineering notation (like 1k, 1M, etc.) for numbers on diagrams #92
  • Added symbol preview and search feature for component library in main windows #135
  • Backported qucs-attenuator, qucs-transcalc and qucs-powercombining from Qucs-0.0.20 #142
  • Added possibility to set dB units for Y-axis on digrams from the diagram properties dialog #92
  • Backported advanced features for projects tree from Qucs-0.0.20 #95
  • Show warning if schematic file name changed, but dataset/display file name are not updated #111
  • Revised examples tree (by Tom Hajjar @tomhajjar); legacy Ngspice-incompatible examples moved to examples/qucsator subdirectory

Component library

  • Qucs-lib tool has been removed from the application; all its features are availbale now from the main window left panel #139
  • Fixed Tubes.lib and LEDs.lib libraries (by @tomhajjar)

General improvements

  • Fixed numerous bug reports. Thanks @tomhajjar and @Zergud for testing.

Windows

  • Added 32-bit Windows portable package

Known issues

  • Parameter sweep doesn't work when using the Fourier simulation with XYCE backend #73
  • Netlister may produce duplicate .SUBCKT entry when using the same component from user and system library #82
  • Auto-scaling on diagram may fail on some conditions for Windows 64-bit platform #133 Other platforms are not affected
  • The 1-point AC simulation produce a set of 1x1 plot if ParameterSweep instead of smooth curve is attached #156

Qucs-S 0.0.24

New simulation types

  • Added S-parameter simulation using Ngspice and Xyce backends; Ngspice>=37 requiered #84, #79
  • Added FFT analysis with Ngspice backend #88

GUI improvements

  • Implemented dark desktop theme support #66
  • Implemented manual setting of the X-axis markers postion #92
  • Added separate setting for schematic and application font

Qt5 support

  • Removed QtScript dependency (thanks @Zergud) #77
  • Fixed Qt5.15 deprecation warnings #75

Component libraries

  • Added quartz crystal library (Crystal.lib); the quartz model is optimized for filter design;
  • Added TL431 device in Regulators library;

General bugfixes

  • Fixed crash on HB simulation with XYCE #28
  • Fixed empty path for working directory #86
  • Show error when schematic contains only DC simulation (no effect for Ngspice) #83
  • Fixed layout in arrow properties dialog #81
  • Fixed drag'n'drop operation from left dock to schematic
  • Fixed newlines in SPICE resitors #62
  • Fixed crash on Wayland #76

Documentation and examples

  • Added offline PDF tutorial; the link for old Qucs tutorial removed from Help menu #78
  • Added examples for new S-parameter and FFT simulations
  • Fixed distortion simulation example #83

Known issues

  • Parameter sweep doesn't work when using the Fourier simulation with XYCE backend #73
  • Netlister may produce duplicate .SUBCKT entry when using the same component from user and system library #82

Qucs-S 0.0.23

Qt5 support and new features

  • The Qucs-S application is now fully ported to Qt5 and could be compiled on modern Linux distributions; #72 #32
  • Added two new component libraries: BF998 and Tubes containing two-gate MOSFET and vacuum tubes (triodes and penthodes provided by @olegkapitonov ) models;
  • Windows binary switched to 64-bit build. The old 32-bit binaries are not provided anymore;
  • Ngspice is now the default simulation kernel on the first application start;
  • The Qucs-S doesn't use a shared settings file with Qucs anymore #71

General bugfixes

  • Fixed "Show last netlists" not showing SPICE netlist when SPICE engine is selected #41
  • Use system default sans serif font instead of "Helvetica", because "Helvetica" cannot be rendered correctly on some platforms;
  • Fixed .INCLUDE directive support with SpiceOpus #16
  • Partially fixed .FOUR simulation support for Xyce backend #73
  • Removed warning about experimental feature in the simulation dialog. Qucs-S is considered to be stable now;