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Ngspice F.A.Q.Version 2.8 (ngspice-38 release) |
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Ngspice F.A.Q.Version 2.9 (ngspice-39 release) |
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Maintained by Holger Vogt |
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Last update: Oct 23 2022 |
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Last update: Jan 24 2023 |
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This document contains the Frequently Asked Questions (and Answers) |
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for ngspice project. |
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@ -123,7 +123,7 @@ |
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capabilities) and user interface are other goals. |
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1.6 What you are going to do? |
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1.6 What are you going to do? |
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An official roadmap for ngspice was never drawn. Contributions made by |
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developers drive ngspice development and the roadmap is built day by |
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@ -140,17 +140,17 @@ |
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+ Compact models: The interest in using ngspice is intimately connected |
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to the available models. To provide the latest models available for |
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active and passive devices is a fundamental goal of the project. In |
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this direction we are integrating ADMS model compiler into ngspice. |
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this direction we are integrating OSDI interface into ngspice for |
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reading OpenVAF compiled Verilog-A compact models. |
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+ Documentation: Commercial simulators come with very good manuals |
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containing tutorials, description of models equations, example of |
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use, suggestions, etc. Spice came with little documentation. The |
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Spice3f manual, available on the Internet has been used as the basis |
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for the new manual. It will be constantly improved during ngspice |
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development and integrated with the documentation accompanying Xspice |
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and Cider. The ngspice manual today contains description of all |
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for the ngspice manual. It will be constantly improved during ngspice |
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development. The ngspice manual today contains description of all |
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features ngspice is offering. It is however not a tutorial of ngspice |
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usage, but there are now several good ones available on the internet |
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usage, but there are several good ones available on the internet |
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(see https://ngspice.sourceforge.io/tutorials.html). |
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@ -252,54 +252,20 @@ |
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The latest version released is: |
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* ngspice-38 (released on Oct 30 2022) |
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* ngspice-39 (released on Jan 31 2023) |
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2.2. What are the latest features in the current release? |
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- New features: |
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+ Add multiplier flag 'm' to behavioral capacitor and inductor. |
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+ Re-enable dc sweep after transient sim. |
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+ When plotting the phase, standard now is "Radiant". |
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+ Add Lundin's geometry correction to the inductance formula. |
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+ New variable keep#branch to write the current to raw file |
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in the old fashion 1 v1#branch current |
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+ Translate PSPICE U instances into equivaalent XSPICE code models. |
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+ New configure flag --enable-shortcheck to enable a shortened make check |
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(only BSIM3 and BSIM4). |
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+ B source will accept parameters in statistical functions like agauss. |
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+ WinGUI: Add a button 'Stop' to stop a simulation in intercative |
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or control mode. |
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+ Update to the .probe p (power measurement) and .probe alli commands. |
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+ Update to XSPICE aswitch and pswitch. |
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+ Make FROM/TO work in TRIG/TARG and WHEN variants of .meas/meas command. |
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+ Limits to exp function, allow 0 for log (returning -1e99), used |
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when starting iterations. |
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+ Insert XSPICE bridging devices automatically when an analogue node |
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has the same name as an XSPICE event node. |
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+ New options savecurrents_bsim3, savecurrents_bsim4, savecurrents_mos1. |
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+ pwlts: a pwl v/i source with time input, smoothing and limiting |
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functions. |
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+ New functions to the Code Model Library: cm_get_node_name() |
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and cm_probe_node(). |
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+ XSPICE: Add bidirectional digital/analog bridge. |
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+ Search for .spiceinit firstly in a user defined directory named in env |
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SPICE_USERINIT_DIR, then in the current directory, then in HOME, then |
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in USERPROFILE. |
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+ If compatmode is lt, change the pow(x,y) and x**y functions: |
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If x < 0, output only if y is integer number, otherwise output 0. |
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+ Add a limit of 0.999 to bipolar parameters mje, mjc, and mjs. |
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- Bug fixes: |
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+ many bugs fixed and code improvements (see bugs 583 and up) |
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+ making error messages more verbose |
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+ memory leaks removed |
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Please see file NEWS accompaniing this FAQ. |
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2.3. What does it look like? |
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Ngspice, as the original Spice3 (and Xspice and Cider) is a command |
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line simulator, but with a graphics output capability. |
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line simulator, but with a graphics output capability. Excellent |
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open source third party tool for schematic capture (KiCad, XSCHEM, |
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Qucs-S and others) are available. |
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2.4. Who are the authors of ngspice? |
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@ -384,7 +350,7 @@ |
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4.4. Disclaimer and Copyright |
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Copyright: Holger Vogt, 2022 |
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Copyright: Holger Vogt, 2023 |
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License: Creative Commons Attribution Share-Alike (CC-BY-SA) v4.0. |
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This document is provided as is. The information in it is not |
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warranted to be correct: you use it at your own risk. |
Holger Vogt
3 years ago