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ngspice-26: update documentation

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Ngspice F.A.Q.Version 1.9 (rework-25 release)
Ngspice F.A.Q.Version 2.0 (ngspice 26 release)
Maintained by Paolo Nenzi, Holger Vogt
Last update: 22-12-2012
Last update: 02-01-2014
This document contains the Frequently Asked Questions (and Answers)
for ngspice project.
@@ -11,17 +11,18 @@
1. INTRODUCTION AND GENERAL INFORMATION
1.1 What is ngspice?
1.2 What is tclspice ?
1.3 Why resurrecting Berkeley's Spice?
1.4 What is the project's goal?
1.5 What you are going to do?
1.6 Legal issues
1.7 What mailing lists exist for ngspice?
1.8 Are the mailing lists archived anywhere?
1.9 What newsgroups exist for ngspice?
1.10 Where can I get a copy of ngspice?
1.11 Where should I look on the World Wide Web for ngspice stuff?
1.12 Where should I look on the World Wide Web for Spice documentation?
1.2 What is sharedspice?
1.3 What is tclspice ?
1.4 Why resurrecting Berkeley's Spice?
1.5 What is the project's goal?
1.6 What you are going to do?
1.7 Legal issues
1.8 What mailing lists exist for ngspice?
1.9 Are the mailing lists archived anywhere?
1.10 What newsgroups exist for ngspice?
1.11 Where can I get a copy of ngspice?
1.12 Where should I look on the World Wide Web for ngspice stuff?
1.13 Where should I look on the World Wide Web for Spice documentation?
2. DEVELOPMENT
2.1 What is the current version?
@@ -52,8 +53,9 @@
1.1 What is ngspice ?
Ngspice is a mixed-level/mixed-signal circuit simulator based on three
open source software packages: Spice3f5, Cider1b1 and Xspice:
Ngspice is a mixed-level/mixed-signal circuit simulator, based on three
open source software packages: Spice3f5, Cider1b1 and Xspice, and
including many bug fixes and enhancements:
- Spice3 is a widely used circuit simulator. It was developed by the
University of California at Berkeley (UCB), by "a cast of thousand"
@@ -73,20 +75,28 @@
The NG prefix has lot of meanings: Next Generation, New Good, etc.
Choose or invent the one you prefer. The heart of the project is the
ngspice program.
ngspice program, with its tremendous advancements.
1.2 What is tclspice ?
1.2 What is sharedspice ?
Tclspice is a circuit simulator that embeds ngspice and provides a
tcl/tk interface to the user. Tclspice is both a batch and interactive
simulator and a building block for simulator applications. Analyses can
be run from a tcl script and vector plotted or post processed using tcl
or a small GUI can be built to analyze a circuit or a set of circuits.
Sharedspice is an interface option to ngspice. It compiles the simulator
into a shared object (or dynamic link library), providing full control
of ngspice to any suitable controlling program (GUI, optimizer,
development system, etc., to be provided by the user).
1.3 What is tclspice ?
Tclspice is a another interface option of ngspice, providing a tcl/tk
interface to the user. Tclspice is both a batch and interactive simulator
and a building block for simulator applications. Analyses can be run
from a tcl script and vector plotted or post processed using tcl. A small
GUI may be built by the user to analyze a circuit or a set of circuits.
Tclspice is obtained compiling ngspice activating an additional option.
1.3 Why resurrecting Berkeley's Spice?
1.4 Why resurrecting Berkeley's Spice?
Berkeley's Spice can be considered the father of most circuit
simulators available today. It is an old but still good piece of
@@ -99,7 +109,7 @@
its source code in the past made this simulator the de-facto standard.
1.4 What is the project's goal?
1.5 What is the project's goal?
Ngspice is both a maintenance and enhancement project. It is a maintenance
project because it aims to provide the free EDA community the best spice3
@@ -110,7 +120,7 @@
capabilities) and user interface are other goals.
1.5 What you are going to do?
1.6 What you are going to do?
An official roadmap for ngspice was never drawn. Contributions made by
developers drive ngspice development and the roadmap is built day by
@@ -119,7 +129,7 @@
+ Compatibility: Ngspice should be compatible with commercial products,
thus allowing people to use the netlist generated for such tools. As
most of the commercial simulators avaiable tracked each other in netlist
most of the commercial simulators available tracked each other in netlist
language, this should not be an impossible task. The most important goal
here is to provide a reliable support for model libraries coming from
foundries.
@@ -135,28 +145,29 @@
Spice3f manual, available on the Internet has been used as the basis
for the new manual. It will be constantly improved during ngspice
development and integrated with the documentation accompanying Xspice
and Cider. This is a very time consuming task and probably the
documentation will always be left slightly behind.
and Cider. The ngspice manual today contains description of all
features ngspice is offering. It is however not a tutorial of ngspice
usage, but there are now several good ones available on the internet
(see http://ngspice.sourceforge.net/tutorials.html).
1.6 Legal issues
1.7 Legal issues
Ngspice, starting from release rework-18 is released under BSD/LGPL
license. Part of the code are covered by other compatible licenses:
spice3 and cider are BSD, xspice is Public Domain and TCLSPICE is
LGPL and the copyright is of their respective owners (need to write better)
The ngspice base license is new BSD, as provided by UCB. For some parts
of the code other compatible licences apply. Please see file COPYING
for details.
1.7. What mailing lists exist for ngspice?
1.8 What mailing lists exist for ngspice?
There are two general mailing lists dedicated to the ngspice project.
Users mailing list: <[email protected]>
This list is for ngspice users, examples, problems, bug reports
This list is for ngspice users. Examples, problems, bug reports
and general discussion on ngspice can be sent here.
Developers mailing list: <[email protected]>
The list dedicated to ngspice development. Developers shold
The list is dedicated to ngspice development. Developers should
subscribe here, to follow the program development. May be used
to send patches, and technical discussion on ngspice.
@@ -176,64 +187,49 @@
http://www.gnu.org/software/mailman/mailman-member
1.8. Are the mailing lists archived anywhere ?
1.9 Are the mailing lists archived anywhere ?
Yes, the lists are archived. There are two places where to look for
archives. The project started on the IEEE Central and South Italy
web server and then moved to sourceforge. Sourceforge provides an
archiving service that cam be accessed via the summary page:
http://sourceforge.net/projects/ngspice
(look for the "Lists" link). Old messages from the pre-sourceforge
age are available at:
http://ngspice.sourceforge.net/lists.html
http://sourceforge.net/p/ngspice/mailman/
1.9. What newsgroups exist for ngspice?
There is no ngspice specific newsgroup. Anyway ngspice threads appear
on newsgroups dedicated to circuit simulation and electronic design.
An (incomplete) list is:
1.10 What newsgroups exist for ngspice?
sci.electronics.cad
comp.lsi.cad
There is no ngspice specific newsgroup. Sourceforge offers additional
discussion groups for ngspice, please see
http://sourceforge.net/p/ngspice/discussion/
ngspice threads may appear on newsgroups dedicated to circuit
simulation and electronic design.
1.10. Where can I get a copy of ngspice?
1.11 Where can I get a copy of ngspice?
You can download ngspice from:
http://sourceforge.net/projects/ngspice
http://sourceforge.net/projects/ngspice/files/ng-spice-rework/
1.11. Where should I look on the World Wide Web for ngspice stuff?
1.12 Where should I look on the World Wide Web for ngspice stuff?
Look at the official Ngpice Web Page:
http://ngspice.sourceforge.net
1.12. Where should I look on the World Wide Web for Spice documentation?
1.13 Where should I look on the World Wide Web for Spice documentation?
There is a detailed ngspice manual available at:
http://ngspice.sourceforge.net/docs.html
There are a lot of Internet sites that have information on spice. The
best way is to ask your preferred search engine. Some interesting
sites are:
Pages on Spice:
http://bwrc.eecs.berkeley.edu/Classes/IcBook/SPICE/
http://embedded.eecs.berkeley.edu/pubs/downloads/spice/index.htm
http://newton.ex.ac.uk/teaching/CDHW/Electronics2/userguide/index.html#toc
Xspice Page:
http://users.ece.gatech.edu/~mrichard/Xspice
Cider Page:
http://embedded.eecs.berkeley.edu/pubs/downloads/cider/index.htm
Others docs are assembled at:
http://ngspice.sourceforge.net/literature.html
@@ -244,7 +240,7 @@
The latest version released is:
* ngspice-rework-25 (released on 04/01/2013)
* ngspice-26 (released on 04/01/2013)
2.2. What are the latest features in the current release?
@@ -288,7 +284,7 @@
2.3. What does it look like?
Ngspice, as the original Spice3 (and Xspice and Cider) is a command
line simulator.
line simulator, but with a graphics output capability.
2.4. Who are the authors of ngspice?