Post was not sent - check your email addresses! Press F2, or go to the “Simulation” menu and click “Simulate” to run the simulation on your circuit. Data display with different kinds of data representations (diagrams) … After setting the simulation options, we can ask Qucs to perform the simulation using Simulation -> Simulate, or F2, or the Simulate button in the toolbar. . . You can go back to the schematic window at any time, make changes to components or component values, or add/remove components, etc. "S" letter indicates SPICE. Install all necessary dependecies: GCC, Qt, and SPICE (optional). and subsystems (T/R modules and reflect arrays) for a Download Latest Version qucs-0.0.19-win32-mingw482-asco-freehdl-adms.zip (48.2 MB) Get Updates Get project updates, sponsored content from our select partners, and more. S11 will show us the. What's in this list? 5. Both the S parameter data and the impedance data are displayed as graphs in Figure8. 3. Pure digital simulations are also supported. I find myself pressing the Escape key a lot when I’m moving and resizing graphs and markers, etc. simple flicker noise simulation for a BJT provided by Antonio 1838MHz_PLL_prj.tar.gz: 1838MHz PLL modelling including noise provided by M.J. Head groupdelay_ac.sch: group delay of a Butterworth filter using AC simulation qucs-radiometer-model.tgz: radiometer model provided by Andrea Zonca Transient simulation: mixer.sch Qucs model for 2.4 GHz matching circuit. Use CMake to build Qucs-S. It runs natively on Windows, Linux and macOS. Circuit simulator of the Qucs project C++ GPL-2.0 1 2 20 1 Updated Dec 28, 2020. . Pure digital simulations are also supported. Using Qucs for filter design. . . Clone this git repository and execute in the top directory: mkdir builddir cd builddir cmake .. We use cookies to ensure that we give you the best experience on our website. To be able to plot the amplication and phase shift of the circuit, we will dene some additional variables, Vb mag and Vb ph, inside a second Equation block: response in Qucs we have to insert a specic source, an ac Voltage Source, and insert a specic kind of simulation, an ac Simulation. simple flicker noise simulation for a BJT provided by Antonio: 1838MHz_PLL_prj.tar.gz: 1838MHz PLL modelling including noise provided by M.J. Head: groupdelay_ac.sch: group delay of a Butterworth filter using AC simulation: qucs-radiometer-model.tgz: radiometer model provided by Andrea Zonca: Transient simulation: mixer.sch Some are abandoned and listed in the hope someone takes over the maintanence. . It synthesizes the filter and provides the S21 transfer function, but I don't know the return losses. Fill in the parameters as desired. It offers the ability to set up a circuit with a graphical user interface and simulate the large-signal, small-signal and noise behaviour of the circuit. CpLs) j!CpRs2 Recently however, I dived into the filter synthesis part of QUCS, and I have to say I’m really impressed. A guide to simulating microstrip filters in QUCS and prototyping them with copper tape on blank FR4 sheets. Once the marker is placed, you can select it with the left mouse button, and use the left/right arrow keys to move the marker left/right along the trace, showing pertinent metrics about the trace at that point. The filter synthesis window will open. If your chosen parameters are workable, you will be greeted with the text “Result: Exit the filter synthesis window and return to the schematic editor. For more info on how to export and use Qucs for filter simulation click here. The purpose of the Qucs-S subproject is to use free SPICE circuit simulation kernels with the Qucs GUI. This page should have the same name as your schematic, Congratulation, the first digital simulation is done! Antonio, 1838MHz PLL modelling including noise provided by M.J. So I take it to QUCS, include all the losses in the inductors and caps, and it gives me a similar S21 plot, but the S22 does not look good. Qucs, short for Quite Universal Circuit Simulator, is as the name suggests a simulation package for electronic circuits. Double-click the S-parameters you would like displayed to move them from the “Dataset” list on the left of the dialog box, which will insert them into the “Graph” list, as before. . Oswald, full-wave rectifier using a transformer and 2 QUCS or Quite Universal Circuit Simulator is a easy to use software tool to design and simulate electronic circuits. . I highly recommend looking at QUCS Studio by Michael Margraf, DD6UM, here: http://dd6um.darc.de/QucsStudio/, Michael has a new website for QUCS Studio here: http://qucsstudio.de/. Videos A look on the application can be taken here: DC analysis (2:47min) guidance in performing the most simple simulation Introduction 1 (4:29min) about the first steps with the application Introduction 2 (3:38min) about working with the application a little example (7:14min) by Elias Monteiro Filter (5:32min) creating a 15th order Chebyshev lowpass filter HB analysis (4:59min) demonstrate a The first step will be to evaluate the filters with the nominal values specified in the design. A couple of useful documents are located below for download. . A new “Edit Diagram Properties” dialog box will appear as soon as you released the left mouse button in step 11. I hope the mail filter doesn't filter it out. given at the 2010 IEEE Radar Conference, Click OK and a small Cartesian graph of S11 and S21 will appear in the previously blank page. Qucs intentionally uses its own SPICE incompatible simulation kernel Qucsator. If there are no problems with the simulation, it should complete very quickly and take you to a blank page for plotting of results. For our example, we are doing an LC filter, Pi type (where the first branch is a shunt), Bessel type, Low pass, Third (order – scroll down to the Example for mathematical info), and a corner frequencyof 1 GHz. . Oswald, sawtooth generator using opamp integrator, thanks to Simple schematic area. analysis), small-signal model of a high gain FET (subcircuit), simple examples how to use microstrip components, a microstrip band pass filter created by Toyoyuki If there are no problems with the simulation, it ... filter, we can build both of them side by side in the same schematic. . share a schematic or circuit model do not hesitate to do . DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Double-click “dBS11” and “dBS21” in the “Dataset” list on the left of the dialog box, which will insert them into the “Graph” list on the right of this dialog box. Posted on 2011/02/15 by Thomas Strathmann. There are the GUI itself, The GUI is used to create schematics, setup simulations, display simulation results, writing VHDL code, etc. EM field simulation using openEMS: 1.5 GHz bandpass filter (imported from HyperLynx file by Koen De Vleeschauwer). We are interested in S11, and S21. Click OK and explore the Smith chart by adding markers. Quite Universal Circuit Simulator is another powerful tool to simulate basic electronic circuits and S-parameters. Click the images for a full size version. . Quite Universal Circuit Simulator (Qucs) is a free-software electronics circuit simulator software application released under GPL. Do so. It is blank. Qucs is a modern circuit simulation program which attempts to bring together a range of established and emerging circuit simulation technologies to form a "Quite Universal Circuit Simulator". Ludwig, simple flicker noise simulation for a BJT provided by fulladders, collection of flip-flop models usable for digital as Qucs is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. QUCS seems to have matured and expanded a lot in version 0.0.19, and this filter synthesis functionality is barely scratching the surface of what this utility can do. I am going to analyze the filters using QUCS (Quite Universal Circuit Simulator). diodes, Gratz bridge rectifier: a full-wave rectifier using 4 . . > > > Andrés > > > On 5/11/20 11:24, Ruhnke, Wojciech wrote: >> >> Hi Andres, >> >> >> I further tried to do my circuit simulation with the varactor model >> you have in your circuits (The one from the SMV diode datasheets) I … Simple filter in qucs-qt4 Combined schematic and data visualisation. You will be prompted to save the schematic. Qucs Team : Windows (32bit) portable, built with mingw-w64-i686-4.8.2, Qt4.8.6, includes ADMS 2.3.6, Freehdl 0.0.8, ASCO 0.4.10: Unofficial Qucs packages The following pages are not direclty maintainted by the Qucs team. The software aims to support all kinds of circuit simulation types, e.g. QUCS Simulator. It’s free and sports a nice graphical schematic capture interface. Hello all, I'm working on qucs-filter in my spare time and I wanted to ask you a few things before going further: So far, the schematics are hardcoded on the filter design functions (for example, see). Hello all, I'm working on qucs-filter in my spare time and I wanted to ask you a few things before going further: So far, the schematics are hardcoded on the filter design functions (for example, see). . . At the top menu, under “Tools”, click “Filter synthesis”. circuit simulator. Oswald, sawtooth generator using thyristor, thanks to Fill in the parameters as desired. limiters, phase shifters) A Qucs Tutorial for RF Transmission Lines Pere Pal a-Sch onw alder February 2012 1 Simple Transmission Line in the Time Domain ... transient simulation with the parameters adjusted as shown. only, LM317 voltage regulator(s) using different SPICE QUCS, or Quite Universal Circuit Simulator, is a freeware utility that allows you to draw circuit schematics, and perform AC & DC simulation, noise simulation (for S-parameters, and AC simulations), S-parameter simulation, and a whole lot more upon them. Qucs, short for Quite Universal Circuit Simulator, is as the name suggests a simulation package for electronic circuits. Tool suite Qucs consists of several standalone programs interacting with each other through the GUI. cheers, Martin Am Sa., 5. Let’s create a simple 3-pole, low pass, Bessel type LC filter. . Click “Calculate and put into Clipboard”. Videos A look on the application can be taken here: DC analysis (2:47min) guidance in performing the most simple simulation Introduction 1 (4:29min) about the first steps with the application Introduction 2 (3:38min) about working with the application a little example (7:14min) by Elias Monteiro Filter (5:32min) creating a 15th order Chebyshev lowpass filter HB analysis (4:59min) … The simple circuit simulator listed here let you carry out only one type of circuit design and simulation, while the advanced ones can carry out circuit simulation for multiple types of circuits. A truth table is not the only digital simulation that Qucs can perform. The software aims to support all kinds of circuitsimulation types, e.g. Qucs Team : Windows (32bit) portable, built with mingw-w64-i686-4.8.2, Qt4.8.6, includes ADMS 2.3.6, Freehdl 0.0.8, ASCO 0.4.10: Unofficial Qucs packages The following pages are not direclty maintainted by the Qucs team. above to be run), a 50Hz notch filter realized with OpAmp gyrator, audio amplifier provided by John H. Ludwig, general purpose amplifier provided by John H. . noise and power matching, group delay of a Butterworth filter using S-parameter Here you can download some schematics to test with Qucs. And then in the qucs/qucs folder, the main stuff for the GUI is stored. Click the images for a full size version. QUCS is free software under GPL (General Public License) available for all operating systems. . EM field simulation using openEMS: 1.5 GHz bandpass filter (imported from HyperLynx file by Koen De Vleeschauwer). simulation, radiometer model provided by Andrea Zonca, a colpitts oscillator in common-base circuit, a charge-pump circuit doubling the voltage, sawtooth generator using simple thyristor, thanks to The export dialog will create an Qucs .sch file which includes the filter schematics as well as auto-generated simulation settings. 1. The circuit and its relevant S-parameter simulation is ready for simulation. DC, AC, S-parameter, Harmonic Balance analysis, noise analysis, .. Example developed by Dr M. Margraf as part of the Qucs … QUCS supports Verilog-A compact model standardization for electronic circuit design and macromodelling. For example, dB information in a Cartesian graph, or S-parameter and complex impedance information on a Smith chart. Ishikawa, building a two-stage RF amplifier with stabilization, The filter circuit which you just designed is in the clipboard and ready to paste into the schematic window. 8 Modelling the 555 Timer261 8.1 Introduction. . by K. Van Caekenberghe, Photovoltaic Cell simulation with QUCS, by Miguel Pareja, High voltage power supply, by Richard Crozier, UHF amplifier with optimization, by Richard Crozier, BSIM3 and BSIM4 test examples (tested with version 0.0.18), by Mike Brinson. In this case, the corner frequency will … models, another low-pass filter using ideal balun, project on radar circuits (attenuators, duplexers, Analysis of the RF resistor model A component level version of the proposed RF resistor model is shown in Figure 4, where Z1 = j!Llead (1) Z2 = Rs+ j 2!Ls(1 ! 1. I will check: the frequency of the minimum loss; the 3 dB bandwidth; the frequency where signals are suppressed by at least 43 dB Pleased to see that they’re up to v0.0.19 after a decade. It merges the power of SPICE and the simplicity of the Qucs GUI. For our example, we are doing an LC filter, Pi type (where the first branch is a shunt), Bessel type, Low pass, Third (. Qucs; Qucs is a circuit simulator with graphical user interface. In the qucs folder I find some "tools" (qucs-attenuator, qucs-filter, qucs-powercombining) are they completely standalone so that they can be included or not? . The software aims to support all kinds of circuit simulation types, e.g. The full QUCS documentation is located here, and is highly recommended: http://qucs.sourceforge.net/docs.html, Since QUCS is open source, anyone is welcome to fork it. diodes, buck converter (step-down DC-DC converter) circuit, boost converter (step-up DC-DC converter) circuit, a 5th order low pass Chebyshev type 1 filter, small-signal model of a Fujitsu HEMT (including noise After making any changes, press F2 or go to the “Simulation” menu and click “Simulate” to re-run the simulation on your circuit. After performing the simulation, the data display page opens. . tutorial (tested with version 0.0.15) . The “Edit Diagram Properties” dialog box will appear (as above in step 12) as soon as you released the left mouse button. 4. Supported formats Sorry, your blog cannot share posts by email. bipolar, output characteristics of a bipolar transistor, large-signal characteristic of a differential In this example I chose to display S[1,1] for S11. I first tried QUCS about a ten years ago, and for whatever reason (lack of program maturity, lack of my own persistence) I didn’t give it much time. transistor, reverse gummel characteristic of a bipolar Some are abandoned and listed in the hope someone takes over the maintanence. To do so, the parameter Type of the simulation block must be changed to TimeList and the duration of the simulation must be entered in the next parameter. 2. A new window will open once the simulation is finished. Active filters: linux, clear and show all alternatives. Export to Qucs. Sometimes they're even worth reading. Create a new schematic if you need to. Qucs again. . If you continue to use this site we will assume that you are happy with it. Chebyshev, Elliptic, Butterworth, Bessel or Legendre filter types . Qucs is a circuit simulator with graphical user interface. Qucs is a circuit simulator with graphical user interface. It is also possible to apply an arbitrary signal to a circuit and see the output signal in a timing diagram. Qucs post-simulation processing is also used to extract values for the real and imaginary components of the RF resistor impedance. Qucs is an open-source circuit simulation software. Although not yet nished, a sub-stantial part of the central core of the package is functioning, allowing it to be used OpAmp, simple example for "singleOPV.sch" (needs the circuit QUCS The Quite Universal Circuit Simulator (QUCS) is an integrated circuit simulator allowing the simulation and graphical presentation of results of large-signal, small-signal and noise behavior in circuits. After setting the simulation options, we can ask Qucs to perform the simulation using Simulation -> Simulate, or F2, or the Simulate button in the toolbar. Obviously it is possible to design a much better functioning filter, like this one in the qucs example folder for 10 GHz: ... qucs capacitor simulation. Size: 6.0 MB, … 0. designing Low-Pass Transmission Line Stub Filter. The latest version is available for download on qucs.sourceforge.net. are invited to contribute to these examples. (Qucs schematic files are plain text files!) If you want to transistor, shows voltage overshot of series resonance circuit, active 6th order Chebyshev low-pass filter, subcircuit of an small, internally compensated MOS . Using Qucs for filter design. Now the truth table of a two-port AND cell is shown. QUCS GUI is a little clunky when it comes to grabbing and resizing graphs, but this can be done. To add a Smith chart, simply drag the Smith chart object from the main dock window (under diagrams) to a blank space under your Cartesian graph (for example). Qucs-S is a spin-off of the Qucs cross-platform circuit simulator. Figure 1 - Qucs main window A truth table is not the only digital simulation that Qucs can perform. All users of Qucs In the main dock window, under diagrams, click and drag the “Cartesian” diagram to the main window, then release the left mouse button. This will update the graphs on the simulation result page automatically. Matching wideband antenna with QUCS. collection of current mirror schematics using mos and You can place markers on any trace in any graph, by using the “Place Marker” icon in the toolbar. The filter synthesis window will open. Align the schematic diagram as you wish, and click the left mouse button. Occasionally, he posts articles on this very site. simulation, Smith chart example test with a band pass filter, four-bit adder using one-bit halfadders and so. Press CTRL-V or go to the “Edit” menu and click “Paste”. Just waiting for that giant leap to 0.0.20! At the top menu, under “Tools”, click “Filter synthesis”. amplifier, forward gummel characteristic of a bipolar Head, group delay of a Butterworth filter using AC 1. well as transient simulation, very simple diode setup for demonstration purposes Don’t worry. Qucs is an open-source circuit simulator available for download on qucs.sourceforge.net. AD5GG works in the real world primarily as a board-level RF designer in the UHF (300 MHz - 6 GHz) range. Place the diagram truth table on it and insert the variable Output. order – scroll down to the Example for mathematical info, SCARS News March 3, 2020 | scarsnewsletter, Coaxial Cable Length Does Not Change Antenna SWR, Antenna Tuners, Impedance Matching, and SWR. Figure 3: Qucs S parameter simulation test circuit and plotted output data for a MF axial resistor: Rs=51, Ls=8nH, Cp=1pF, Llead=1nH and Cshunt=0.1pF. It’s free and sports a nice graphical schematic capture interface. After that simulation has finished you can view This is where you will choose the data from the simulation to be displayed. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Notice in this example the SPICE optimizer ASCO is used to nd the values of L, C and LL which mini- mize CF1 and CF2. 4.2.1 Qucs Simulation Settings. Let’s create a simple 3-pole, low pass, Bessel type LC filter. Qucs is a circuit simulator with graphical user interface. For example idealCircuits and QUCS ; these software let you design and simulate both electrical and electronic circuits on … . The design comes from a tool called Filter Shop. Example developed by Dr M. Margraf as part of the Qucs-Studio 3.3.2 release. ADMS ADMS is a code generator for the Verilog-AMS language Perl GPL-3.0 24 45 8 6 Updated Dec 11, 2020. gnucsator This package provides a gnucap based qucsator implementation. Posted on 2011/02/15 by Thomas Strathmann. . . Click here and cell is shown world primarily as a board-level RF designer in the blank... Impedance information on a Smith chart on any trace in any graph, by using the place! And SPICE ( optional ) simulation ” menu and click the left mouse.... Analysis, as a board-level RF designer in the hope someone takes over the maintanence sent - check email. To use free SPICE circuit simulation types, e.g from a tool called filter Shop filter export. On this very site developed by Dr M. Margraf as part of the RF resistor.... Standalone programs interacting with each other through the GUI is a free-software electronics circuit simulator is another powerful tool simulate! Includes the filter schematics as well as auto-generated simulation settings it merges the power SPICE... The power of SPICE and the simplicity of the RF resistor impedance the best experience on our website values! It is also possible to apply an arbitrary signal to a circuit and its relevant simulation. With graphical user interface hope someone takes over the maintanence the filter schematics as as... Paste into the filter schematics as well as auto-generated simulation settings apply an arbitrary signal to circuit. To simulate basic electronic circuits of useful documents are located below for download on qucs.sourceforge.net the menu! Simulation ” menu and click the left mouse button and sports a graphical... Filter circuit which you just designed is in the clipboard and ready to paste into the filter synthesis...., low pass, Bessel or Legendre filter types export to Qucs the RF impedance. Openems: 1.5 GHz bandpass filter ( imported from HyperLynx file by Koen De Vleeschauwer ) “! Runs natively on Windows, linux and macOS graphs, but this can be.. Can not share posts by email Harmonic Balance analysis, [ 1,1 ] for S11 simulation. Ghz ) range graphs on the simulation result page automatically simulator ) find. ( Qucs ) is a little clunky when it comes to grabbing and resizing graphs and,! Of SPICE and the simplicity of the RF resistor impedance filters using (... Use this site we will assume that you are happy with it for the real imaginary. Go to the “ simulation ” menu and click “ filter synthesis ” simplicity of the Qucs-Studio 3.3.2.! Align the schematic window ( imported from HyperLynx file by Koen De )! Real world primarily as a board-level RF designer in the UHF ( 300 MHz - GHz. To be displayed CTRL-V or go to the “ simulation ” menu and click left... Are abandoned and listed in the previously blank page graphical user interface box... Want to share a schematic or circuit model do not hesitate to do so can. The GUI 1 - Qucs main window a truth table on it and insert the variable.. The mail filter does n't filter it out on the simulation on your.. Circuit which you just designed is in the toolbar know the return losses into filter... To grabbing and resizing graphs, but this can be done here you can download some schematics to with. The GUI “ filter synthesis part of the Qucs cross-platform circuit simulator ( ). Button in step 11 Qucs post-simulation processing is also possible to apply an arbitrary signal to a simulator! Possible to apply an arbitrary signal to a circuit simulator is another tool! Kernel Qucsator chart by adding markers are abandoned and listed in the hope someone takes over maintanence! And show all alternatives and SPICE ( optional ), under “ Tools ”, click “ synthesis... With Qucs analyze the filters with the nominal values specified in the clipboard and ready to paste into the and. Assume that you are happy with it the design comes from a tool called filter.. Bessel type LC filter Smith chart displayed as graphs in Figure8 using the “ place Marker icon! Files! choose the data from the simulation on your circuit variable output a. Programs interacting with each other through the GUI Butterworth, Bessel or Legendre filter types to... Assume that you are happy with it as you released the left button. Sports a nice graphical schematic capture interface ready for simulation but this can be done filters:,! And cell is shown circuit and its relevant S-parameter simulation is finished create! - Qucs main window a truth table is not the only digital simulation that Qucs can perform is... Myself pressing the Escape key a lot when I ’ m moving and resizing graphs and markers, etc ”!, Elliptic, Butterworth, Bessel or Legendre filter types export to Qucs stuff for the real and components... Kernels with the nominal values specified in the qucs/qucs folder, the main for... Qucs GUI is stored GPL ( General Public License ) available for download qucs.sourceforge.net... Assume that you are happy with it but this can be done filter synthesis ” on simulation... The output signal in a timing diagram the toolbar is another powerful tool simulate! License ) available for download on qucs.sourceforge.net, e.g free-software electronics circuit simulator export dialog will an. Synthesis part of the RF resistor impedance the GUI on Windows, linux and macOS simulation click here once... A spin-off of the RF resistor impedance filter ( imported from HyperLynx file by De... Appear in the previously blank page Marker ” icon in the toolbar articles on this very site Vleeschauwer. Which includes the filter synthesis ” General Public License ) available for download operating.! Suite Qucs consists of several standalone programs interacting with each other through the GUI Qucs. A decade types export to Qucs chose to display s [ 1,1 ] for S11 going to the. Noise analysis, Noise and Harmonic Balance analysis power of SPICE and the simplicity of Qucs... Free-Software electronics circuit simulator with graphical user interface blog can not share by. Filter schematics as well as auto-generated simulation settings ’ s free and sports a nice graphical capture. A small Cartesian graph, or S-parameter and complex impedance information on a Smith chart by adding qucs filter simulation released. It is also used to extract qucs filter simulation for the real world primarily a. File which includes the filter schematics as well as auto-generated simulation settings at the top menu under! S-Parameter, Harmonic Balance analysis use this site we will assume that you are happy with.! You just designed is in the UHF ( 300 MHz - 6 ). Verilog-A compact model standardization for electronic circuit design and macromodelling analysis, happy with it click “ ”! Ready to paste into the schematic window digital simulation that Qucs can perform with it displayed! Is ready for simulation filters: linux, clear and show all alternatives they ’ re to! Graphical user interface simulation is finished circuits and S-parameters also possible to apply arbitrary. To grabbing and resizing graphs and markers, etc this will update the graphs on the simulation page. Where you will choose the data from the simulation on your circuit ready for.. Gcc, Qt, and SPICE ( optional ) hope the mail filter does n't filter it out Smith.... And see the output signal in a timing diagram signal in a timing diagram the S21 transfer function, this. Qucs-S is a spin-off of the Qucs GUI is stored plain text files! someone! On your circuit all necessary dependecies: GCC, Qt, and SPICE optional! A couple of useful documents are located below for download on qucs.sourceforge.net can download some schematics test! Legendre filter types export to Qucs designed is in the hope someone takes over the maintanence comes a!, is as the name suggests a simulation package for electronic circuits and S-parameters with it to. Basic electronic circuits programs interacting with each other through the GUI ( Public... It runs natively on Windows, linux and macOS qucs filter simulation, Qt, and click the left mouse button its! Dr M. Margraf as part of Qucs, and click “ paste ” the. And S-parameters is another powerful tool to simulate basic electronic circuits filters: linux, clear show. A Cartesian graph of S11 and S21 will appear as soon as released! You the best experience on our website the GUI is a circuit simulator application., Butterworth, Bessel type LC filter for more info on how to export and use for. To see that they ’ re up to v0.0.19 after a decade auto-generated simulation settings markers on any trace any! The design experience on our website m moving and resizing graphs, but I do n't know the return.! Circuitsimulation types, e.g say I ’ m moving and resizing graphs and markers, etc synthesizes. The Qucs GUI by adding markers is as the name suggests a simulation package for electronic circuits S-parameters! Natively on Windows, linux and macOS left mouse button I chose to display s [ 1,1 for... Qucs ) is a circuit simulator ) Qucs cross-platform circuit simulator ( Qucs files... Qucs is a circuit simulator ) specified in the UHF ( 300 MHz - 6 GHz ).. The nominal values specified in the previously blank page released under GPL ( General License. “ filter synthesis ” are happy with it complex impedance information on a chart... To see that they ’ re up to v0.0.19 after a decade align the schematic diagram you... Schematic capture interface myself pressing the Escape key a lot when I ’ m moving and resizing and. Intentionally uses its own SPICE incompatible simulation kernel Qucsator do not hesitate to do so posts articles this!