About tools to simulate circuits. Specify the tool used.

Simulations use mathmatical models to predict the behaviour of a circuit. The wikipedia article is a good starting point to learn more. This tag should be used for questions related to circuit simulation tools (software).

Questions specifically about the popular SPICE simulator -- or one of its many descendant -- should also be tagged .

Typically circuits are described to the simulator in either a text file "SPICE netlist" or as a graphical .