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Many of the LTspice files are stored as an ASCII text file, which can be viewed or edited with any ASCII text editor program. One side benefit of an ASCII file format is that a schematic can be listed in any printed document, such as book, magazine, datasheet, research paper, or homework assignment, which allows recreating LTspice files without ...
For mixed signal circuit simulation ngspice allows users to create a user-defined node definition file (UDN) of a new device model interface. The implementation of the node is created and simulated by using C language with macros which is compiled by standard C/C++ compilers. New models can be added to the simulator using:
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 uses an integrated environment for all of the stages of the design process: Schematic capture, PCB layout, Gerber file generation/visualization, and library editing. KiCad is a cross-platform program, written in C++ with wxWidgets to run on FreeBSD , Linux , Microsoft Windows and Mac OS X .
Altium Designer supports import & export of various PCB and CAD data exchange file formats. [ 11 ] [ 12 ] The tool's native file formats are the binary file formats *.SchDoc and *.PcbDoc . It can also import and export AutoCAD *.dwg / *.dxf and ISO 10303-21 STEP file formats.
XCircuit regards circuits as inherently hierarchical and can save circuits both in PostScript (.ps) and Ngspice (.cir) netlists (hierarchical or flattened) file formats for further processing (e.g. for Layout vs. Schematic check). The program compiles PostScript files from special template-labels specified by user.
Schematic of Spice Gummel–Poon model NPN. The Gummel–Poon model is a model of the bipolar junction transistor.It was first described in an article published by Hermann Gummel and H. C. Poon at Bell Labs in 1970.
OrCAD Systems Corporation was a software company that made OrCAD, a proprietary software tool suite used primarily for electronic design automation (EDA). The software is used mainly by electronic design engineers and electronic technicians to create electronic schematics, and perform mixed-signal simulation and electronic prints for manufacturing printed circuit boards (PCBs).