ac/dc freeware downloads
Qucs
0.0.19 freeware downloadQucs 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, Harmonic Balance ...
LTspice IV
24.1.3 freeware downloadLTspice, developed by Linear Technology, is a high-performance SPICE simulation software that has become a staple tool for engineers and designers in the electronics industry. Renowned ...