Numerical analysis and visualisation routines for post processing Ngspice simulation data. Plus a significant number of extra simulation and device model extensions.ĭistributed with Ngspice is a data manipulation package called Ngnutmeg. Including for example, DC, AC, and transient simulation, Fourier-analysis and sensitivity analysis, It implements the original SPICE3f5 simulation capabilities, Of the most widely used and stable current generation open source SPICE simulators available. Three open source software packages: SPICE 3f5, Cider 1b1 and XSPICE. Ngspice is a mixed-level/mixed-signal circuit simulator implemented from The Ngspice, Xyce and SPICE OPUS simulators are not embedded in Qucs but operate as independent external simulators.īefore use they must be installed on the computer operating system that you are running Qucs. Subsystem specifically designed for this purpose. Spice4qucs includes built-in support for SPICE via a The Ngspice, Xyce and SPICE OPUS compatible simulator engines. This section describes a number of fundamental methods for launching circuit simulations from the Qucs GUI using Your proposal will need to list the commands you plan to implement and a reference showing syntax and usage.Basic Ngspice, Xyce and SPICE OPUS simulation Introduction To qualify for one of these projects, you should be a relatively advanced simulator user, already familiar with such scripting. If you want to do this, your application should include an analysis showing that you understand what we have, what they have, and what it will take to get there. Sometimes it is desirable to write scripts in some known language (Python, Ruby, Perl) or some numeric tool (octave, R). If you want to do this, your application should include an analysis showing that you understand what we have, what they have, and what it will take to get there.ģ. The idea here is to make a set of commands, many are just variants on what we have, to mimic the scripting capability of another simulator, such as NGspice, Hspice, Spectre, or Qucs. Compatibility with other simulators: We have a lot of the commands already, but maybe not in a compatible form. The “WAVE” class has a lot of what you need built-in, and can be extended, so part of this is already done.Ģ. This would include addition, multiplication, convolution, time-shifting, and others. Wave processing: We need the ability to do math on waveforms. Here are three categories of commands needed:ġ. Gnucap has the mechanism, but only a few commands are implemented. One example is the “nutmeg” part of Spice. Some other simulators have a scripting language with lots of commands. If you are already active in the community of the tool being translated (kicad, geda, or qucs), that will be considered favorably when comparing competing applications. Before applying you should be familiar with gnucap language plugins, the Verilog based intermediate format and also the format you are writing the translator for. If you want to tackle one of these, dig in ahead of time so you (and we) know what you are getting into. There have been several starts that were never completed. In the past, the schematic and pcb translator projects have been more difficult than expected. When used with gnucap's translation utility (a subset of gnucap), they will provide the ability to translate from any supported format to any other, and also to a Verilog based intermediate language that can be used as a neutral, nonproprietary exchange format. These plugins, when used with gnucap, will provide an interface for smooth interoperation. It is up to you to decide whether to use it or not. There is already some work done on some of these.
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