Hi, First of all thank you very much for your efforts for QUCS! I have a question about the software. I know it is possible to do ac time domain simulations but I also wonder if I can do Time Domain Reflectometer (TDR) impedance simulations for ensuring signal integrity in my design with the QUCS. Can you help me with my question? Best regards.
I have a Qucs circuit with the Optimizer apparently running OK. I see a dialog box for a number of seconds with values changing. This is my first optimizer problem under Qucs. The difficulty is that I always end up with the initial values shown under "optValues1" equations. When I look at the tutorial, "Getting Started with Optimization," it makes the point that, "The variable names correspond to the identifiers placed into properties of components and not the components' names. " But I can find...
Thanks but this is rather new to me. Do I download an app for my Mac for Qucs-S and, if I chose to use spice models directly, is Github the working environment?
Hi, Qucs as a project is stopped at the moment. I suggest you use Qucs-S, a very active project. On the other hand, you can use spice models directly. https://github.com/ra3xdh/qucs_s
Hi there, I have used LTSpice in the past but no longer use Windows so am exploring QUCS on a Mac Mini. I am trying to find out how to obtain a model for the MJL21194C transistor as it is not in the component models provided. What are the best ways to create or load a model, presumably from a library elsewhere? Thank you.
RC filter synthesis?
RC filter synthesis?
Amp works doing s-parameter analysis. In Qucs, 10dB = Voltage gain in Qucstudio, 10dB = Power gain
Amp works doing s-parameter analysis. In Qucs, 10dB = Voltage gain in Qucstudio, 10dB = Power gain
I made a misstatement. The amp does work for most test cases. For the attached case it doesn't work but it may be "Power Source" doesn't work for Transient Analysis.
On Sat, Nov 04, 2023 at 09:15:57PM -0000, Tom Hajjar wrote: The "ideal" amplifier component in Qucs and Qucsstudio doesn't work correctly. I would not use it. Please share a netlist.txt, and explain/point out what doesn't work. It's good to keep track of bugs in Qucsator. thanks.
Yes Voltage gain is 20 log Vout/Vin Power gain is 10 log Pout/Pin The "ideal" amplifier component in Qucs and Qucsstudio doesn't work correctly. I would not use it.
Hello Tom, thanks for your answer. First i must learn more about S-Parameters. But in your schematic you wrote: 20dB=10log10. Shouldn't the equation be like this: 20dB=20log10? Achim
Amp partially works doing s-parameter analysis. S11, S22 are wrong however. In Qucs, 10dB = Voltage gain in Qucstudio, 10dB = Power gain
Amp works doing s-parameter analysis
Amp works doing s-parameter analysis
I selected RC filter synthesis from the tool, but I don't get any curves on the Cartesian screen....Smith's map normally shows S-paramet curves...the same Graph parameters were selected. Is there an easy explanation. Question about WIndows version.. BR Matti T. Koskinen
Hello, who can help? Subject: Ideal Amplifier: There is only the right result, when parametrizing Z1=50 Ohm, Z2=50 Ohm, R_load=50 Ohm. All other parametrizing gives a wrong result. G-setting: G=10 (see attached files).
UPS, just saw this is not the right place for QUCS-S! Sorry....
Hello! I am new here. I have used QUCS before, for AC an S parameter simulations, mostly RF stuff. Now I decided to try transient with QUCS-S / ngspice. For start, I simulated a simple oscillator. The simulation seems to run OK, I only have two problems/questions. I have added an initial voltage to the tank capacitor, to kickstart the oscillation, but I see no effect. The oscillator still does a cold start. How can I persuade the simulator to use the initial value? I would like the spectrum in dB,...
Hello Vadim, I'll write to my dedicated forum for QUCS-S. I have a last request: Could you joint the .sh file of your schematic. It will be very useful to understand it, for the beginner that I'm. See you on Github discussion page, goodbye. Thierry
On Mon, Sep 25, 2023 at 08:05:43AM -0000, Vadim Kuznetsov wrote: Verilog-A in Qucs has not been finished. Qucs-S supports Verilog-A models using Ngspice+OpenVAF link. ADMS+Qucsator support is kept in Qucs-S only for backward compatibility. Dear Vadim. Yes, sure. For those who do not know what I mean by "not finished".. The Qucs project is aiming at using Verilog-A/MS as intended by the designers: to replace SPICE. For an independent assessment of OpenVAF see [1]. The Qucs project is looking for contributors....
Dear Qucs-S users! Please read this before posting questions in this forum. Use Github discussion https://github.com/ra3xdh/qucs_s/discussions to ask questions about Qucs-S and find the proper support. This forum is for old Qucs project.
@thierryhardy , Also please don't post questions about Qucs-S here. This forum is for old Qucs application. Use special Github discussion page: https://github.com/ra3xdh/qucs_s/discussions
Hello Thierry Parameter sweep works differently in Qucs and Qucs-S. Parameter sweep requires device name but not variable name. Refer to new tutorial: https://ra3xdh.github.io/pdf/qucs_s_tutorial.pdf Don't use old Qucs tutorials with Qucs-S. Don't try to launch examples for qucsator with Qucs-S+Ngspice. This will not work without a modification. You can find the proper examples in share/qucs_s/examples/ngspice subdirectory in the application installation root. Your schematic requires slight modification...
Verilog-A in Qucs has not been finished. Qucs-S supports Verilog-A models using Ngspice+OpenVAF link. ADMS+Qucsator support is kept in Qucs-S only for backward compatibility.
One year later, any news regarding Qucs 0.0.20 for Windows? Consider switching to Qucs-S. It was recently ported to Qt6 and released for all modern platform. I have added a 64-bit Windows installer recently. Qucs-S uses Ngspice as the default simulation kernlel. Since v2.0.0 it supports quick simulator switching if you still need to use Qucsator. Get the latest release here: https://github.com/ra3xdh/qucs_s/releases/tag/2.0.0
I need to perform a wideband matching. I have the complex S11 for the input impedance measured by VNA in a touchstone/csv file, and the same for the load. However, I do not see a way in Qucs to defin e a power-port (S-port) with a frequency-dependent impedance, or any alternate option to simulate such a port with a transformer perfectly matched to the desired impedance. Is there any way to do that?
I need to perform a wideband matching. I have the complex S11 for the input impedance measured by VNA in a touchstone/csv file, and the same for the load. However, I do not see a wai in Qucs to defile a power-port (S-port) with a frequency-dependent impedance, or any alternate option to simulate such a port with a lumped network. Is there any way to do that?
I need to perform a wideband matching. I have the complex S11 for the input impedance measured by VNA in a touchstone/csv file, and the same for the load. However, I do not see a wai in Qucs to defile a power-port (S-port) with a frequency-dependent impedance, or any alternate option to simulate such a port with a lumped network. Is there any way to do that?
On Wed, Sep 13, 2023 at 03:23:43PM -0000, Tom Hajjar wrote: Qucs 0.0.20 won't do Verilog-A due to a bug but Qucs 0.0.19 does. Qucs 0.0.20 has never been released. The problem is, that it depends on Qt3. So, it is hard to build and harder to distribute. Last time I looked, Qucs-S maintained a Qt3 copy/fork/wrapper. I tried, and it didn't seem to just work with Qucs.. Verilog-A in Qucs has not been finished. But we'll need the structure, especially, as soon as Verilog-AMS is ready. You may consider...
I've been using Qucs-S instead. It has come a long way in the last few years and allows using manufacturer Spice models. Qucs-S now does S-parameter analysis and supports S-parameter files. Qucs 0.0.20 won't do Verilog-A due to a bug but Qucs 0.0.19 does.
Hi. One year later, any news regarding Qucs 0.0.20 for Windows? Is this project still alive?
On Wed, Sep 06, 2023 at 01:32:02PM -0000, Thierry Hardy wrote: here is the netlist.txt, if you can add missing features in Gnucap it’s a good think. But the amont of work you have is so big, don’t take care of the small linux user that I am. Greetings Thierry The netlist [..] Thanks Thierry. This seems to be a Spice netlist. Gnucsator only replaces Qucsator, and Qucsator does not need Spice. I think Qucs-S has some option to set the simulator back to Qucsator. With this, netlist.txt should be compatible....
Hi Félix, here is the netlist.txt, if you can add missing features in Gnucap it’s a good think. But the amont of work you have is so big, don’t take care of the small linux user that I am. Greetings Thierry The netlist : Qucs 2.0.0 /home/thierryhardy/Téléchargements/bridge04_ok/bridge04_ok.sch .INCLUDE "/usr/share/qucs-s/xspice_cmlib/include/ngspice_mathfunc.inc" Qucs 2.0.0 /home/thierryhardy/Téléchargements/bridge04_ok/bridge04_ok.sch R2 _net0 _net1 500 V1 _net1 0 DC 1 R5 0 _net0 {RMEASURE} R1 _net2...
On Tue, Sep 05, 2023 at 09:43:43AM -0000, Thierry Hardy wrote: This error message is attached as a file because it goes badly if I copy it into the forum. Please always provide the netlist.txt. Not sure if attachments are allowed on the mailing list. You can always paste the contents. It doesn't matter, I'll wait for qucsator simulator to progress. The Qucsator simulator is no longer developped (we will only fix obvious bugs). Gnucap will take over once the Verilog-AMS implementation is ready. Gnucsator...
the attached file sorry Thierry
Hi Cmat, I tried your recommendation, unfortunately the qucsator simulator does not work with my computer. I have an error message that I sent to qucs-bugs@lists.sourceforge.net The error message is join: This error message is attached as a file because it goes badly if I copy it into the forum. It doesn't matter, I'll wait for qucsator simulator to progress. For now I'm learning. Thanks for your help. Bye Thierry
Hi Thierry, Attached file with a correction, first select the qucsator simulator from "simulator settings..." then you must select "Pr1.I" from the data simulator. Greetings PS: It only works with the qucsator simulator.
Hi Thierry, Attached file with a correction, first select the qucsator simulator from "simulator settings..." then you must select "Pr1.I" from the data simulator. Greetings PS: It only works with the qucsator simulator.
Hello, this file is from the exemple of QUCS web page, it's the modelisation of a bridge, The simulation works but not the graphic. Can you help me and send me the corrected version of the file, I'm joining to you. PS: I'm using QUCS-S version 2.00. Thank you very much. Thierry
I found the solution please see the joint file Thierry
Hello CMAT Thank you very much for the attached files it works fine. Please have a look at my new topic: QUCS-S 2.00. simulation with two probes, one for voltage and one for current thank you very much Thierry
can you help me, now i am using QUCS-S 2.00. working with FEDORA 38. In the attached file there are two probes, one for voltage and one for current, do you know how to make them work? Best regards Thierry
Hi Thierry, I opened the diode file in Qucs-S, set up the "ngspice" motor simulator and ran it, the simulation finished fine. To see the diagram after the simulation, you need to take a "Cartesian" diagram of the component dock and place it on the schematic sheet (.sch). Remember to uncheck "open data visualization after simulation" (File>Document Settings...). I recommend updating the Qucs-s version to the latest version of Qucs-s 2.0.0. Please let me know if it helped you. Best regards CMAT
Hello CMat, Thank you for the file th01_tested.zip, I have tested it with Qucs-s Version 1.0.2. It's not the good format but it works with Qucs-s. I have try to make my own file but if I try to simulate a small window open. I can see: Initial Transient Solution Node Voltage vs 1.77612e-23 ve 0 v1#branch -1.77612e-26 No. of Data Rows : 2011 binary raw file "diode_file_04_tran.txt" Reset re-loads circuit * qucs 1.0.2 /run/media/thierryhardy/61/qucs-s/diode_file_04.sch Circuit: * qucs 1.0.2 /run/media/thierryhardy/61/qucs-s/diode_file_04.sch...
Hello, I think the problem is the ideal source of AC voltage. I am attaching a file with the ideal AC voltage source of version Qucs0.019 instead of Qucs0.0.20. In fact, I don't use Qucs as a simulator anymore because it's a stopped project. Now I use Qucs-S, you might want to give it a try. I hope it helps you.
a simple circuit with a diode and a resistance The software response is "line 4: syntax error". Can you help me for my first step whit qucs 0.020 Thanks a lot Thierry
Hi, I am trying to simulate s2p model using a template sch provided with “simulation_SParameter.qucs” from examples webpage. From the template I deleted all components. I have only input port, s2p file, output port. The simulation is configured as 1-5GHz with 5 point and noise sim enabled. As an s2p model I use BFU725F_2V_5mA_S_N.s2p downloaded from NXP website. Problem nr 1: the simulation fails with the model file BFU725F_2V_5mA_S_N.s2p. However the simulation runs fine when I remove the noise...
Hi, I am trying to simulate s2p model using a template sch provided with “simulation_SParameter.qucs” from examples webpage. From the template I deleted all components. I have only input port, s2p file, output port. The simulation is configured as 1-5GHz with 5 point and noise sim enabled. As an s2p model I use BFU725F_2V_5mA_S_N.s2p downloaded from NXP website. Problem nr 1: the simulation fails with the model file BFU725F_2V_5mA_S_N.s2p. However the simulation runs fine when I remove the noise...
Hi, I am trying to simulate s2p model using a template sch provided with “simulation_SParameter.qucs” from examples webpage. From the template I deleted all components. I have only input port, s2p file, output port. The simulation is configured as 1-5GHz with 5 point and noise sim enabled. As an s2p model I use BFU725F_2V_5mA_S_N.s2p downloaded from NXP website. Problem nr 1: the simulation fails with the model file BFU725F_2V_5mA_S_N.s2p. However the simulation runs fine when I remove the noise...
You need to add a new line character at the end of your s2p file. Just open the s2p file in a text editor and press "enter" once or twice at the end of your file.
I just upgraded to linux mint 21 and got this:''This PPA does not support jammy'' What's the fix?
Your in the wrong forum. Your file is for Qucs-S NOT Qucs. Qucs-S uses ngspice for it's simulation engine. Qucs uses Qucsator.
Without all the files in your project folder it is hard to help you. Also ngspice is used with Qucs-S not Qucs. Qucs uses Qucsator for it's simulation engine.
Without all the files in your project folder it is hard to help you. Also ngspice is used with Qucs-S not Qucs
I fixed my issue. Well at least all the technical issues with QUCS and ngspice. I found the equations work great for static variables but do not support run time. So I just need to move any runtime equations into the source equation. Also QUCS has an NGspice SW (voltage controlled switch) but and CSW current controlled switch but the operation is very different. And lastly the B current source does not allow for negative currents.
I may have found my issue. In ngspice LET is used to define a vector. But QUCS seems to be using LET to define variables. My error message is that one of those variables is undefined.
I seem to have one thing corrected. For some reason I had selected ngspice, and it let me add ngspice components but it was still using QUCS for simulation so it wasn't recognizing the ngspice devices. Resetting the default simulator to ngspice and restarting seemed to fix that issue. And now the netlist looks very similar to the netlist in ngspice examples. However it still doesn't work. Now the error message is that BIspad can't decode what Vex is. Vex is generated in the QUCS function. Qucs 0.0.19...
OK, I seem to have hit a different problem. I had found a voltage controlled current source that was documented in the ngspice docs, and a voltage controlled switch. However after closing QUCS and restarting, when I open the schematic it says there are errors and both of those models don't exist. Further when I search to try to add those components back in, they are not found. I can't find the B supplies any more. I included a screen shot of the ngspice spec sheet for B supplies.
I am using QUCS 0.0.19 on Ubuntu 22.04. I am trying to run a transient simulation with 3 non linear switches and a non linear current source. The goal was to implement a SPAD image sensor circuit based on a few papers I read, but this is just a small circuit with the components which were giving me issues. The error is: line 14: syntax error, unexpected Identifier, expecting '"' I think my error is some misunderstanding on how the syntax works. I have seen a lot of explanations for syntax on ngspice,...
Hello Brian. I found your posts interesting as I have been down a similar path but with different tools. My interest was getting maximum light from a vintage headlamp rather than charging, but there is a great deal in common. Two observations follow. What is needed for your circuit is a "behavioural" AC voltage source that produces an output controlled by a formula that depends on the current frequency. I have no idea if it exists in QUCS, but in LTSPICE the E-source with LAPLACE keyword does that....
OK, so I finally managed to get some working solution, painful but it works. I wanted to cover the speed range 0-30Kph (as per the manufacturers graph above) so I created an ac simulation with 31 points covering 0Hz to 48.501Hz, for this I created an equation of 1.6167Hz/Kph (represents the o/c voltage from the graph of 10V @ 14Kph). From this simulation I exported the data from the Cartesian chart of Vout to a csv file. Unfortunately the csv file didn't contain the expected voltages, it exported...
Hi, I'm new to QUCS and have done some simple circuit DC and AC simulations and found it quite useful. I'm trying to simulate a circuit for a dymano (Bicycle Hub Dynamo) where the open circuit AC voltage is directly proportional to the frequency (speed of rotation) and simulate this with a simple load. Basically its open circuit voltage is 0.44V/Hz equating to 22VAC (RMS) at 50Hz (30km/h). I've tried sweeping the voltage but this gives a frequency sweep for each step of voltage. What I'm looking...
On Tue, Mar 28, 2023 at 01:44:10PM -0000, Filipe Rodrigues wrote: Im doing a project where i need to convert schematics to netlists subsequently. Im wondering if we have some information available. Is there any description or code available? Any help would be appreciated. Thanks in advance. I am assuming that you wish to create Qucsator netlists from Qucs schematics. There is code for this in Qucs, embedded into the Qt3 GUI [0]. A refactored approach, modular Qucs [1] also reads and writes schematics...
Im doing a project where i need to convert schematics to netlists subsequently. Im wondering if we have some information available. Is there any description or code available? Any help would be appreciated. Thanks in advance.
I try to understand the nigbt model written in Verilog-A. But making a sweep with the default parameter set for output characteristic I only get values in nA. range w/o any expected characteristic. BTW - same behaviour I have with openVAF compiled model and ngspice. Has this model worked at any time? Thank you.
I need to simulate 171050601 IC . For that , i want to knoiw whether that design can able to simulate in qucs or not?
Does library file for 171050601 IC available?
Does library file for 171050601 IC available?
On Sun, Jan 29, 2023 at 04:31:14PM -0000, JTech wrote: Did you do the step: sudo apt-get install libqt4-dev libqt4-qt3support ? Does not exist on my OS. I imported Vadims Qt3 compat layer (Qucs actually needs Qt3, not 4), and pushed a patch to the qt3_compat branch. It also/still crashes on startup, but there is something to dig into now...
If you look at the "configure" file in the qucs/qucs directory, that error message is generated based on the Qt package version not being >= 4.6.0 (see lines below). Try doing this command: pkg-config QtCore --modversion Mine says: 4.8.7 Even though my "qmake --version" says Using Qt version 5.13.3 In the "configure" file (note, not in the top qucs folder, but the qucs/qucs folder): if ! $PKG_CONFIG --atleast-version=4.6.0 ${qt_name}Core; then as_fn_error $? "Qt >= 4.6.0 is required." "$LINENO" 5...
If you look at the "configure" file in the qucs/qucs directory, that error message is generated based on the Qt package version being >= 4.6.0 (see lines below). Try doing this command: pkg-config QtCore --modversion Mine says: 4.8.7 Even though my "qmake --version" says Using Qt version 5.13.3 In the "configure" file (note, not in the top qucs folder, but the qucs/qucs folder): if ! $PKG_CONFIG --atleast-version=4.6.0 ${qt_name}Core; then as_fn_error $? "Qt >= 4.6.0 is required." "$LINENO" 5 fi
Did you do the step: sudo apt-get install libqt4-dev libqt4-qt3support ?
On Sun, Jan 29, 2023 at 03:39:06PM -0000, JTech wrote: I did not get that error on the "./configure" step. I have Qt version 5.15.3 on my system according to the command "qmake --version". Are you sure your qt is up to date? I installed qtbase5-dev (5.15.8+dfsg-2) $ qmake --version QMake version 3.1 Using Qt version 5.15.8 in /usr/lib/x86_64-linux-gnu And still configure: error: Qt >= 4.6.0 is required. The message should read "Qt4 is required", as it really checks for Qt4. Regarding the branch,...
Hi Felix, I did not get that error on the "./configure" step. I have Qt version 5.15.3 on my system according to the command "qmake --version". Are you sure your qt is up to date? Regarding the branch, I thought the doc's said that "master" would be the latest stable branch. I will try "develop_filtered" as you mentioned and see if that makes any difference. Regards, Eric
On Sat, Jan 28, 2023 at 06:54:21PM -0000, Eric Jappe wrote: I built qucs from the master branch up to "make install" with no errors. However, when I then do "make check" I get "PASS: helloworld.sh", "PASS: doesnotexist.sh" and then it just freezes. If I try to run qucs from the command line or the icon for it (in "show applications") nothing happens. I am building/running on Ubuntu 22.04. Any help appreciated! Hi Eric. How did you satisfy the Qt dependency? I only get "configure: error: Qt = 4.6.0...
I built qucs from the master branch (as well as relase-0.0.20) up to "make install" with no errors. However, when I then do "make check" I get "PASS: helloworld.sh", "PASS: doesnotexist.sh" and then it just freezes. Update: I rebuilt and this time "make check" fails on netlist.sh. but it completes the check. Before when it was hanging it was hanging on the netlist.sh test. Also, I was unable to do sudo apt-get install octave-epstk. prior to building. It cannot find that package. Not sure if this...
I built qucs from the master branch (as well as relase-0.0.20) up to "make install" with no errors. However, when I then do "make check" I get "PASS: helloworld.sh", "PASS: doesnotexist.sh" and then it just freezes. If I try to run qucs from the command line or the icon for it (in "show applications") nothing happens. I am building/running on Ubuntu 22.04. Any help appreciated!
I built qucs from the master branch up to "make install" with no errors. However, when I then do "make check" I get "PASS: helloworld.sh", "PASS: doesnotexist.sh" and then it just freezes. If I try to run qucs from the command line or the icon for it (in "show applications") nothing happens. I am building/running on Ubuntu 22.04. Any help appreciated!
Hi Szymon. Thanks for the bug report. For further debugging, please provide the netlist.txt file, and possibly, the s4p file referenced from your schematic. Do you have a similar circuit/analysis/schematic or parameters where the result matches the one obtained from LWTDR?
Single ended to mixed mode Mode conversion result of the same file with usage of Lecroy WavePulser TDR -- Pozdrawiam Szymon
Speaking as a long time contributor to Qucs, and the person who essentially once revived it from death with the help of others, I don't find him to be "abusing the forum" just for mentioning some alternative software. I recall a time when we actually cared about windows users and made sure there was a build, now there's barely a build available for Linux, so I don't think we can complain if people mention alternatives that they can actually use. Sadly I don't have time to help maintain Qucs any more,...
Towards an answer to the original question, Al has posted a preliminary response on our mailing list [1]. [1] https://lists.gnu.org/archive/html/gnucap-devel/2023-01/msg00001.html
On Fri, Dec 30, 2022 at 11:57:52PM -0000, rjrodrig wrote: It is totally free. It may be gratis. But it is not even open source. "Free" in "software" (such as Qucs) is about liberty, not price. The product you advertise is the exact opposite. Read about it free software here [1]. I am not abusing the forum at all. You are promoting non-free software, which is not the purpose of this discussion board. [1] https://www.fsf.org/about/
I was simply suggesting it to him so he does not struggle. It is totally free, and I am not abusing the forum at all. I am simply giving him a venue so he gets out of his rut. Up to you.
On Fri, Dec 30, 2022 at 08:09:36PM -0000, rjrodrig wrote: just download LTSpice and the LM741 is there. you won't have any of these issues with the simulator. it is at www.analog.com LTSpice is off-topic, as it won't work with qucs, and it is non-free. Please don't abuse this forum.
On Fri, Dec 30, 2022 at 07:19:33PM -0000, Francisco J. Velasco wrote [1]: Therefore, any solution that has to go through Linux, or by virtual machines, or the like, it is not possible for me to use it Thanks Francisco. I think I understand your situation. In case my previous email wasn't clear.. Yes, we used to have native windows support (no Linux, no VM, you name it). It's still there, but we'd need someone to try it and report back to us. I volunteer to attempt to cross compile Gnucap e.g. for...
just download LTSpice and the LM741 is there. you won't have any of these issues with the simulator. it is at www.analog.com
Thanks for the information, but I still don't know how to use Linux's most current versions (I only have some notion of a long time ago), and I see that I would have to do things that I do not understand right now. I downloaded qucs because it was free and worked under W10. And although I have in mind to install Linux (possibly Ubuntu) and look at how it works, I currently use W10 and I have no enough form to put myself with Linux with a minimum of seriousness. Therefore, any solution that has to...
On Fri, Dec 30, 2022 at 02:19:14AM -0000, Francisco J. Velasco wrote: gnucap works under windows 10? It used to work through wrappers, and it still should [1]. If you have a copy, you could try. Check "Make2.mingw32" Makefiles for the relevant build information. Nowadays, there is a POSIX subsystem, "WSL", and it should run an ordinary Gnucap build. One way to try this is thorugh Nix. Nix seems to run on WSL [2], and there are Gnucap packages [3] for Nix. If you need help, please let us know through...
gnucap works under windows 10? My Qucs version is 0.0.19
gnucap works under windows 10?
Hi Francisco. Thanks for the data points. I played with it for a bit. Qucsator seems to compute a DC operating point but no luck with tran. With Gnucsator I get an operating point that looks identical, and I get 1ms of a transient from there. Cant tell if it is correct. I get a few "open node" warnings... Your circuit may need some debugging. As Qucsator is probably obsolete, no longer developed or maintained, I recommend Gnucsator. It is essentially a bunch of Qucs related plugins, allowing the...
I attach the Netlist file, the log when I attempt the simulation, and the data and schemes files. As you will see, a Warning of the DC simulation appears, and I think it can be due to the value of the tension sources. The rest of Warnings I think they are for transistors. They are "ideal" transistors, since I am doing a theoretical study. And I intend to improve the circuit with "real" transistors, from the transistor library, if I can solve this simulation problem.
There are many ways in which a simulation can fail. Qucs produces a file, "netlist.txt", that it passes to the simulator. Please provide a copy.
Hello good. I am studying how the 741 operational amplifier works inside, so I have created a simulation of the internal circuit. When the simulation is of the type DC I have no problems, but when I try to do the simulation of transitory, I get the error that I have indicated, in addition to many warning lines where it places virtual resistances in the transistors. Can someone tell me what fails? This is the circuit that simulates: https://es.wikipedia.org/wiki/Amplificador_operacional#/media/Archivo:OpAmpTransistorLevel_Colored_Labeled.svg...
Allow optimization stop / display best values / cost function
Lossy Microstrip