![]() ![]() ![]() Anyway, a lot of work has to be done and thus we are looking for people who want to support the project. DC, AC, S-parameter, noise and transient analysis is possible, mathematical equations and use of a subcircuit hierarchy are available. In fact there is now a kind of useful user interface for setting up schematics and presenting simulation results in various types of diagrams. So far we were working on the GUI and on some basic simulation features. It has been programmed for usage in the Qucs project but may also be used by other applications. It takes a network list in a certain format as input and outputs a Qucs dataset. Qucsator, the simulation backend, is a command line circuit simulator.DC, AC, S-parameter, Harmonic Balance analysis, noise analysis, etc. The software aims to support all kinds of circuit simulation types, e.g. Qucs, briefly for Quite Universal Circuit Simulator, is a circuit simulator with graphical user interface (GUI).Download Qucs Linux Windows Mac Integrated Circuit Simulator After that simulation has finished you can view the simulation results on a presentation page or window. Then one is left to fiddle with the simulation parameters randomly. My QUCS schematic source files here: qucs-schematic.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. Though annoyingly, qucs provides very little feedback when simulation fails, just Singular jacobian at t 0.123e-5 s. So what is wrong here? Should i add 50Ohm at the end or maybe decoupling capacitors. I want to build a simple circuit with S-parameters box as a starting point for further matching. Frequency sweep range the same as in datasheet (100Mhz to 26GHz) My idea was that if i see smith chart of a raw device, it must be something like datasheet:īut it is not. So here it is:Īnd build Smith-chart for it. Actually it is modified last example of line matching to 300 Ohm at **broken link removed** tutorial. So i decided stop searching for spice equivalent scheme of NE3210S01 and use simple S-parameters file NE3210S01v1_2-18_2_10.S2P.Īfter adding two-port S-parameters box to QUCS i found some unknown Vref voltage pin, and connected it to ground. Qucs 0.0.8 was the rst release to include digi-tal simulation. Hello guys, in this video I will show how to design and simulate the high pass filter (second-order) circuit in Qucs software. Adding performance analysis in the digital domain makes Qucs a truly universal simulator. How to design high pass filter (second order) circuit in Qucs V-8. But i read somewhere that S-parameter files can be successfully used for many simulations, representing device as a "black box" with known input and output. One of the primary aims of the Qucs project is the development of a universal circuit simulator that allows circuit performance to be investigated from DC to microwave frequencies. Fortunately i've found this tutorial: **broken link removed** (A Qucs Tutorial for RF Transmission Lines) Very good tutorial.Īlso i found information about using SPICE model of some transistor in QUCS: reports/14.Bah-Transistor_simulating_report.pdf. QUCS is very good program, although it is not so obvious how things can be done because need to add some equations. NE3210S01v1_2-18_2_10.S2P - ! Vds = 2 V Id = 10 mA <- (i think need use this file, looks like typical safe biased operation). NE3210S01v1_2-18_0_-2p5.S2P - Vds = 0 V Vgs = -2.5 V (device is turned off, but some negative DC bias on gate?) My first confusion is why there are three sets of S-parameters? ![]() I downloaded S-parameters files for NE3210S01 from this webpage: ![]()
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