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The following table is split into two groups based on whether it has a graphical visual interface or not. The latter requires a separate program to provide that feature, such as Qucs-S, [1] Oregano, [2] or a schematic design application that supports external simulators, such as KiCad or gEDA.
This permissive open source license allows its integration as a simulation engine into several — proprietary or free/libre — EDA tools such as KiCad, [10] [11] EAGLE (program), [12] CoolSPICE, Altium and others. Ngspice has a command line input interface and offers plotting capability.
Of these, LTSpice and Micro-cap are free proprietary applications based on SPICE. Micro-Cap was released as freeware in July 2019, when its parent company Spectrum Software closed down while LTSpice has been free for a long time.
KiCad schematic editor for schematic capture KiCad PCB editor for board layout and design KiCad 3D viewer showing both VRML and IDF features on a demo board KiCad 3D viewer. KiCad uses an integrated environment for all of the stages of the design process: Schematic capture, PCB layout, Gerber file generation/visualization, and library editing.
LTspice is a SPICE-based analog electronic circuit simulator computer software, produced by semiconductor manufacturer Analog Devices (originally by Linear Technology). [2] It is the most widely distributed and used SPICE software in the industry. [ 6 ]
Unbalanced Splitter drawn with KiCad. KiCad is a free software suite of tools including schematic design. It has some nice features: Snap to grid; Component libraries with built-in editor; Rotate components; Moving a component moves attached traces when pressing CTRL while clicking the group to move.
The table below provides an overview of notable computer-aided design (CAD) software. It does not judge power, ease of use, or other user-experience aspects. The table does not include software that is still in development (beta software).
Most analog circuits are still designed in a manual fashion, requiring specialist knowledge that is unique to analog design (such as matching concepts). [9] Hence, analog EDA tools are far less modular, since many more functions are required, they interact more strongly and the components are, in general, less ideal.