WRspice is a powerful and flexible circuit simulation and analysis tool. WRspice is an extension of Jspice3, which was derived from Berkeley Spice3f4 and Spice2g.6. While WRspice is being developed to include new features, it will continue to support those capabilities and modes which remain in extensive use with the Spice2 and Spice3 programs.
Unlike the Jspice3 program, WRspice makes extensive use of input graphics and the point and click metaphor for program control. About a dozen different control panels are available from a toolbar for controlling various aspects of simulator operation. The user can open a selection of control panels and arrange them according to preference. An "update" command saves the arrangement for future WRspice sessions. Unlike Jspice3, WRspice does not contain an internal schematic capture front-end. Instead, it is designed to work in conjunction with the powerful Xic graphical editor.
WRspice includes several unique features, including a built-in Verilog parser and language extensions for mixed-mode (analog/digital) simulations, and random noise sources.
Although the command line interface remains (though it has been enhanced) many users prefer the graphical controls. The large number of "set" variables has been reduced to a few graphical buttons and input boxes.
Context sensitive help is provided throughout. The HTML-based help system functions as a web browser, making Internet resources conveniently available. The help database can be easily augmented with site-specific information.
WRspice provides internal device models through a separate library loaded at run time. This library is modifiable by the user, so that the user with some programming experience in the C++ language can add, modify, or delete device models. The user has full control over the device models used by the simulator, and can easily add specialized models needed for the user's applications.
WRspice works seamlessly with the Xic graphical editor program, providing the illusion of a single application to the user. Xic provides a graphical framework for generating input from a schematic, initiating the simulation run, and plotting output. WRspice is also highly effective as a stand-alone application, where input is supplied in ascii files using a superset of the industry standard Spice syntax.
A powerful scripting language and interpreter are provided, so that automated simulation and data manipulation can be employed. The syntax used is an efficient but easy to learn C-like scripting language representing a superset of the capabilities of the scripting language used in Spice3.
Commands exist for certain repetitive analysis types, such as Monte Carlo and operating range analysis. A "loop" command analyzes a circuit while varying circuit parameters, producing multi-dimensional output vectors. WRspice has the capability of parceling out tasks to other machines on a network, greatly reducing the time required for a multi-analysis job.
WRspice is available for FreeBSD, Linux, Sun Solaris (sparc), and Microsoft Windows.
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