This talk will present an overview of analog(ue) and mixed-signal simulation, with a focus on Gnucap .. the GNU Circuit Analysis Package.

I will introduce the basis of simulation, the basic "SPICE" methods (DC, AC, and transient analysis), mixed-signal (event driven) simulations, and "Fast-Spice". Also, some derived methods, including Fourier analysis, Harmonic Balance, and Periodic Steady State will be introduced. Along with this, I will review where the Free simulators (Gnucap, Qucs, NGspice, Xyce) stand.

I will also present the plugin based architecture of Gnucap, and how it encourages contributions and fast deployment without sacrificing quality of the base work.