Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.
- schematic capture
- analog and digital simulations
- data visualization
Hey I am sorry for previous bad review This is superb......
This is probably the most useful open source circuit simulator I ever found. It is accurate and (once you learn a bit) really easy to use.
This is a good program, but when I use the RLCG transmission line to generate a .s4p file, I meet a problem: In the frequency domain, there won’t be anything in the 1,3/1,4 or 2,3/2,4 combinations.
Very nice product. I am a DSP guy, so I do not use circuit simulators often. I have some experience with SPICE and Orchad, but I have a very strong preference for Qucs. Easier to use and richer in features. For example, the "basic OpAmp" is just what you need when you want to make some examples in class without drowning in the complexities of a "real" OpAmp.
Great program ! THANKS