Ngspice is an open source mixed-level/mixed-signal circuit simulator based on Berkeley SPICE 3. The simulator is developed and maintained by a collective group of volunteers, and is based on the venerable SPICE circuit simulator. Ngspice provides a powerful, yet simple-to-use, circuit simulation environment that can be used for both analog and digital circuit simulation.
Features of Ngspice
1. Mixed-level/mixed-signal circuit simulation: Ngspice is capable of simulating both analog and digital circuits. It is also suitable for use in mixed-level/mixed-signal designs, allowing for the simulation of components such as transistors, op-amps, logic gates, etc.
2. Full-featured user interface: Ngspice provides a comprehensive user interface that allows users to enter and view circuit design data, simulation results, and other information. The user interface also provides easy access to a variety of features, including circuit optimization, parameter sweeps, Monte Carlo analysis, and more.
3. Extensive library of circuit elements: Ngspice includes a large library of circuit elements, allowing users to easily and quickly simulate a wide variety of circuits.
4. Flexible and customizable: Ngspice is highly customizable, allowing users to modify and extend the simulator to meet their specific needs. It also provides an extensive set of command-line options, allowing users to control the simulation and analysis process.
5. Cross-platform support: Ngspice is available for a variety of platforms, including Windows, Linux, OS X, and more.
6. Simulation speed: Ngspice provides fast simulation speeds, allowing the user to quickly and efficiently simulate and analyze their designs.
7. Support for external solvers: Ngspice can be used with a variety of external solvers, such as SPICE, HSPICE, and Verilog-A.
8. Open source: Ngspice is open source, and its source code is freely available for anyone to modify or use as they wish.
9. Comprehensive documentation: Ngspice includes comprehensive documentation, allowing users to quickly get up to speed with the simulator.
10. Free and powerful: Ngspice is free to use, and provides an excellent and powerful tool for circuit simulation and analysis.
The use of ngspice provides engineers with a powerful simulation tool to accurately analyze and debug their electronic circuits.