. ngSpice is available for gEDA. gnuCAP is also available for gEDA. LTSpice is free from Linear Technology.I thought that one of the other analog chip makers had a spice too but I can't rememberwho:(I have been to a few talks on simulation given by physicists and EEs who have donechip design. Each of the talks seems to end like this -. Except for simple circuits you will spend most of your time getting modelsand determining where the models need to be modified for your application. Unless you are doing work for an IC manufacturer the manufacturer will notgive you detailed models.

You will not be able to avoid a prototype. You should only simulate subsections of your design. Simulating the entiredesign is not usually practical.Also most of the free simulators are not distributed with models. Re-distribution ofthe models is usually a copyright violation. LTspice is distributed with models ofthe Linear Tech parts. I am not sure the quality of the models.

All sources are assembled into a tarball for download. Elmedia player serial number for mac. Binary packages for MS Windows and MAC OS X are to be found here as well. Ngspice installation (quick intro) If you are on MS Windows (64 bit, Windows 7 and up), download ngspice-3064.zip from the web site given above. Expand the contents of the zip file to an arbitrary location on your.

Most manufacturersdo not want to reveal too many details about their process. I found an excellent online written in Java, and its free-and-open-source. You can play with the software by visiting the link, and wait for the applet to pop-up.

(you need the )Edit components and connections by right-clicking anywhere/on a component. You can build entire circuits using this and simulate it visually to understand how the circuit works. (voltage is shown in green/red, simply amazing) If you start with one of the gate, (choose it from the Circuits menu), then you can click on gates or digital signals to switch them on/off, and see your circuit react.You can setup oscilloscope views on any connection too. (see bottom of the pic). $begingroup$ ngspice is based on Spice 3f5 while most commercial offerings used the Spice 2 code as a base. This does not mean they are worse since the Spice 3 rewrite is not all roses.

Back to the point: the most important difference is the change in specification of nonlinear components (POLYNOMIAL vs. Normal equation) which breaks many models and treating node names as strings (in the original Spice 2 they had to be numbers and were compared numerically 0 00). $endgroup$–Apr 1 '11 at 16:28.

There are a couple of heavy-duty packages and a lightweight program for Linux.The serious packages are. They are each a collection of programs that work well together (like Orcad); they include a schematic capture, a simulator, a waveform viewer, and a PCB layout tool. They are very sufficient except my professor requires the '.out' file generated by pspice, so I still have to use that.The lightweight program is. It's great for quick simulations. The libraries are quick and easy to use and find parts from.

The schematic capture is much easier to use and prettier than the other programs. It uses either gnucap or ngspice for the simulations, so they're pretty good. One major drawback that I have found is that the waveform viewer does not provide a logarithmic view and there's no way to get data out of it.