qucs_s/NEWS.md

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;