![]() Qucs, briefly for Quite Universal Circuit Simulator, is aĬircuit simulator with graphical user interface (GUI).The simulation results on a presentation page or window. After that simulation has finished you can view Qucs is an integrated circuit simulator which means you areĪble to setup a circuit with a graphical user interface (GUI)Īnd simulate the large-signal, small-signal and noise behaviour Take a look at the screenshots to get a feel for what it So far Qucs is not yet finished, but it is already Previous news items What's Qucs?Qucs stands for Quite Universal Circuit Other paths using QSettings (~/.qucs/qucsrc is nowĪdded beginnings of m-code transient solver New implementation of matrix calculations usingĪdded option for changing the home directory and Updated manuals, developers and FAQ webpages Released Mac OSX installer (10.7 to 10.9), ASCO included.įor FreeHDL, Verilog-A, users are better served using a Updated package for Ubuntu 14.04 (Trusty) and 14.10 (Utopic), Released installer fo Mac OSX 10.6 (Intel 64 bit) (ASCO included). Latest documentation for "master" branch available for Publication "Qucs: An introduction to the new simulation and compact device modelling features implemented in release 0.0.19/0.0.19Src2 of the popular GPL circuit simulator.",Įnabled automatic generation and deployment of Doxygen source code documentation. If you want to stitch the voltage and current plots together into one image, you can use ImageMagick for that:Ĭonvert voltage.png current.png append voltsamps.Latest News Latest stable release: 0.0.19 The Plot->2D.->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on. Open this up with QtOctave and plot a histogram. If all goes well, it should generate a monte_carlo.m file. Sed s/$REPLACE/$(date %N)/ $INFILE | qucsator | sed -nr \ The value of NUM determines how many times the simulation is run. The value of REPLACEME should be the unique placeholder value used as the pseudo-random number generator seed earlier. The variables of the script can be edited to suit. Then, paste the following bash script into a text editor and save it as monte_carlo.sh. Copy the contents of this file into a text editor and save it as monte_carlo_netlist.txt. Open up the netlist by selecting Simulation->Show Last Netlist. ![]() You'll now need to automate running the simulation with different seeds. ![]() You should be able verify that the result changes slightly given different random number seeds. The actual value is just a placeholder and will be replaced when the simulations are run from the commandline. For now, define an equation the likes of z=srandom(1337). For randomized results on each run, it is necessary to provide a seed to the random number generator. Next, replace all the regular resistors in your original circuit with subcircuits of the previously made varying resistor. You can recreate this circuit yourself or download res_tol.sch from. This can be accomplished with the following circuit. It is necessary to define a resistor with a variable value within a given tolerance. Use a dc simulation, a current probe to measure the current you're interested in and two labels and a difference equation to define the specific voltage drop you're interested in measuring. The first step is to draw your circuit and make sure it simulates as expected. The following steps show how to produce voltage and current histograms in a simple sources-and-resistors circuit.
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