Recent changes to news

Qucs 0.0.16 has been released.

Michael Margraf — Thu, 17 Mar 2011 21:21:33 -0000

Qucs 0.0.16 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.16, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Qucs, including all its libraries and its applications, is available
as free (as in speech) software under Open Source licenses. Qucs can
be obtained in source code from <http://sourceforge.net/projects/qucs>.

Features

Qucs provides a GUI based on Qt for setting up electrical and
electronic circuitry, a simulator, which is able to simulate the small-
and large signal as well as the noise behaviour of these circuits.
The results can be shown on a special presentation page in different
formats (rect, polar, smith, tabular, 3d-cartesian, locus and
polar-smith combinations). Pure digital simulations are also
supported.

Compiling Qucs 0.0.16

The complete source code for Qucs 0.0.16 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.16 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Qucs is an independent project of only a few developers, translators,
etc, collaborating over the Internet to create and freely distribute a
sophisticated, customizable and stable microwave circuit simulator.
For enhancing the development speed we are looking for more
developers, who want to support the Qucs Project.

Changes in this release

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.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.15 has been released.

Michael Margraf — Sat, 25 Apr 2009 16:37:34 -0000

Qucs 0.0.15 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.15, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.15

The complete source code for Qucs 0.0.15 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.15 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with new translations into Arabic and Czech,
model libraries for PMOSFETs, NMOSFETs, regulators, varistors and
ideal components, and many new primitive components such as EPFL-EKV
NMOS/PMOS V2.6, rectangular waveguide, HICUM L0 v1.2, HICUM L2 v3.23,
photodiode, digital buffer, microstrip radial stub, phototransistor,
RLCG transmission line and numerous new digital primitives. Passing
parameters to Verilog-HDL and VHDL subcircuits and typed generic
parameters of VHDL files are now supported as well as arbitrary in/out
signals. Simulation time for digital files (Verilog and VHDL) are now
stored in an additional configuration file and the import dialog has
been replaced by a complete import/export frontend for the
Qucs-Converter command line tool. US letter formats for schematic
frame have been added. The build system now implements an additional
install step for MacOSX and the appropriate icons.

In the analogue simulation core global nodes (e.g. subst!) have been
introduced, property references inside the same instance of a
component and variables in constant parameter simulation boxes are
allowed. A noise figure property has been added to the amplifier
model and the matrix power operation is available in the equation
solver. The Qucs-Converter command line tool allows now to translate
existing HICUM models into library elements as well as the translation
of polynomial C's and L's and F, H, E and G polynomial SPICE sources.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.13 has been released.

Michael Margraf — Sun, 30 Dec 2007 14:45:56 -0000

Qucs 0.0.13 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.13, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.13

The complete source code for Qucs 0.0.13 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.13 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with some new components, i.e. file based
current and voltage sources, a modular operational amplifier and the
HICUM L2 v2.22 device model. In equations immediate vectors and
matrices are allowed as well as engineering notation of numbers; also
some more functions have been added (random, srandom, StabFactor and
StabMeasure). Touchstone files can be exported and CSV files can be
imported using the command line data converter QucsConv.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.12 has been released.

Michael Margraf — Sun, 17 Jun 2007 11:29:43 -0000

Qucs 0.0.12 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.12, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.12

The complete source code for Qucs 0.0.12 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.12 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with a new translation into Ukrainian, a
selectable preprocessor in the SPICE file component and two new
components, i.e. an exponential voltage and current source. Libraries
can now contain analogue as well as digital subcircuits. Analogue
modelling is substantially strengthened by symbolically defined
devices. And last but not least pure digital simulations can be also
performed by Verilog-HDL as an alternative to VHDL.

In the simulation backend the equation defined devices (EDD) have been
implemented as well as the two new signal sources. Also the list of
available functions in the equation solver has been extended to
support vt(), hypot(), limexp(), arcsec(), arccosec(), arsech() and
arcosech(). Furthermore logical and rational operators as well as the
ternary ?: construct can be used in equations.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.11 has been released.

Michael Margraf — Sat, 17 Mar 2007 22:49:42 -0000

Qucs 0.0.11 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.11, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.11

The complete source code for Qucs 0.0.11 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.11 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with two new translations into Czech and
Catalan, subcircuit parameters and equations in subcircuits. The
tabular scrollbar can now be moved directly with the mouse cursor
dragging and painting and handling of graphics has been much improved
at zoom factors != 1. Some new components have been added including
the device models for HICUM L2 v2.1 and FBH HBT.

The simulation backend now supports the knee current in the diode
model and the excess phase of the BJT during transient analysis.
Subcircuit parameters have been implemented which can be sweep
parameters and constants as well as equation variables. Equation
variables can now also be used in component properties and input
parameters of components in equations. The model for the non-ideal
microstrip junction has been implemented. There are three new
components, i.e. twisted pair, 4-terminal transmission line and a
bondwire. Moreover ADMS XML scripts have been implemented for
Verilog-AMS device models. Two example device models have been
added: HICUM L2 v2.1 and FBH HBT.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.10 has been released.

Michael Margraf — Fri, 01 Sep 2006 07:40:05 -0000

Qucs 0.0.10 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.10, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.10

The complete source code for Qucs 0.0.10 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.10 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with an attenuator synthesis application,
support for nine-valued VHDL logic and user libraries which can be
created from subcircuits. Steps have been taken to allow circuit
optimization using ASCO in one of the next releases. Data files such
as Touchstone, CITIfiles, VCD and IC-CAP model files can be imported
using a graphical interface, CSV files can be exported. Projects can
be easily exchanged using a project package file. There is now
support for a schematic frame and syntax highlighting for VHDL data
types and attributes.

The simulation backend is now supporting the SVD algorithm as an
equation system solver, initial conditions (transient analysis) for L
and C are available and the equation solver has a new function signum.
Support for IC-CAP model files, ZVR ascii data, CITIfile and
Touchstone as import file formats has been added to the qucsconv data
converter.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.9 has been released.

Michael Margraf — Mon, 29 May 2006 06:54:58 -0000

Qucs 0.0.9 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.9, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.9

The complete source code for Qucs 0.0.9 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.9 are
included in the software archive. Only Qt-Libs >= 3.1 (but < 4.x) and
the glibc are required.

About Qucs

Changes in this release

The new release comes with a Russian translation and the GUIs language
can be explicitely chosen in the application settings dialog. The
digital simulation abilities have been improved by a VHDL text editor
and hand-crafted VHDL files can be used as subcircuits. The number of
ports of the S-parameter component is no more limited. Components can
now be either deactivated as a short or an open. There are some new
components such as a coaxial line, a differential voltage probe, a
switch, AM- and PM-modulators and a relais. Also many bug-fixes have
been incorporated.

The simulation backend does support the above mentioned new components
as well. Additionally delay times of digital components and controlled
sources during the transient analysis are now considered. There is
a time-domain model of the ideal transmission line and a frequency-
independent loss factor for this component. A damping factor for the AC
voltage and current sources during transient analysis has been
introduced. Temperature coefficients for the resistor have been added.
Certain characteristic values (e.g. ErEff or Zl) of components can be
saved into the dataset during the S-parameter simulation. Moreover the
DC behaviour of the S-parameter file component can be chosen to be
either an open or a short. There have been added many new functions
to the equation solver: ceil, fix, floor, round, step, besselj,
bessely, erf, erfc, cumsum, cumavg, cumprod, sqr, polar, rms, dbm2w,
w2dbm, integrate, dbm, besseli0, erfinv, erfcinv, kbd, runavg, variance,
stddev, Time2Freq and Freq2Time. The functions xvalue, yvalue, min,
max and avg can have an additional range specification and the following
new two-argument functions have been introduced: arctan, min and max.
Last but not least a dataset can now be exported to the csv file format
using the command line converter.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.8 has been released.

Michael Margraf — Sat, 21 Jan 2006 22:34:45 -0000

Qucs 0.0.8 has been released.

The Qucs project (Qucs = Quite Universal Circuit Simulator) today
announced the immediate availability of Qucs 0.0.8, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Compiling Qucs 0.0.8

The complete source code for Qucs 0.0.8 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.8 are
included in the software archive. Only Qt-Libs >= 3.1 and the glibc
are required.

About Qucs

Changes in this release

Digital simulations using FreeHDL are now possible with Qucs. The
FreeHDL program is available at <http://www.freehdl.seul.org>.
Truth-table generation as well as arbitrary signals in digital
circuits are possible.

The new release comes with a translation into Turkish, two new
diagrams - truth table and timing diagram. Non-Qucs files can be
added to a project, matching circuits can be created and there is
a dialog for changing the properties of several components at once.
The filter synthesis tool supports some more filter types, many new
models have been added to the component libraries and the DC bias
can be annotated in the schematic. Also digital gates, correlated
noise sources, an ideal coupler and mutual inductors are now
supported.

Beside the above new components the simulation backend also
implements the temperature and area models of the diode, jfet, mosfet
and bjt. The equation solver allows impedances other than 50ohms
in rtoz(), ztor(), stoy(), ytos(), stoz(), ztos(), rtoy() and ytor()
and supports some new functions: stos(), dft(), idft(), fft() and
ifft(). For imported S-parameter file data a cubic spline
interpolation is possible. The SPICE converter now also translates
two and three mutual inductor constellations.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Qucs 0.0.7 has been released.

Michael Margraf — Fri, 22 Jul 2005 08:39:41 -0000

Qucs 0.0.7 has been released.

The Qucs project (Qucs = Quite universal circuit simulator) today
announced the immediate availability of Qucs 0.0.7, a Qt-based
advanced and powerful microwave circuit simulator for GNU/Linux and
other UNIXes.

Features

Qucs provides a GUI based on Qt for setting up microwave circuits, a
simulator, which is able to simulate the small- and large signal
behaviour of microwave circuits. The results can be shown on a
special presentation page in different formats (rect, polar, smith,
tabular, 3d-cartesian, locus and polar-smith combinations).

Compiling Qucs 0.0.7

The complete source code for Qucs 0.0.7 may be freely
downloaded. Instructions on compiling and installing Qucs 0.0.7 are
included in the software archive. Only Qt-Libs >= 3.1 and the glibc
are required.

About Qucs

Changes in this release

Qucs is now known as 'Quite Universal Circuit Simulator'. The GUI
additionally supports text painting rotations in subcircuit symbols,
Latex-like mnemonics (e.g. \tau) in graphic texts and diagram labels
and a new tool was born: a library manager already including some
transistors, diodes, substrates, etc. Several small improvements and
bug fixes have been incorporated. The simulation backend supports
some new functions in the equation solver, i.e. unwrap(), rad2deg()
and deg2rad(). Also a heavy bug in the non-linear operational
amplifier model has been fixed.

Thanks

A lot of thanks go to the translators and to the supportive user
responses so far encouraging us to improve the software. We couldn't
have done it without you!

Project renaming.

Michael Margraf — Mon, 04 Jul 2005 07:10:20 -0000

According to a request made by Trolltech we had to rename Qucs from "Qt universal circuit simulator" to "Quite Universal Circuit Simulator". That is because the name Qt belongs to Trolltech, as Qt is a trademark of Trolltech. So they are not fine with the software name incorporating their registered trademark.