GNUCAP(1)							    Debian GNU								 GNUCAP(1)

NAME

       gnucap - GNU Circuit Analysis Package

SYNOPSIS

       gnucap [-b filename] [-i filename]

DESCRIPTION

       GNUCAP  is  a  general  purpose circuit simulator.  It performs nonlinear dc and transient analyses, fourier analysis, and ac analysis lin-
       earized at an operating point.  It is fully interactive and command driven.  It can also be run in batch mode or as a server.   The  output
       is produced as it simulates.  Spice compatible models for the MOSFET (level 1,2,3) and diode are included in this release.

       Since  it is fully interactive, it is possible to make changes and re-simulate quickly.	The interactive design makes it well suited to the
       typical iterative design process used it optimizing a circuit design.  It is also well suited to  undergraduate	teaching  where  Spice	in
       batch  mode  can be quite intimidating.	This version, while still officially in beta test, should be stable enough for basic undergraduate
       teaching and courses in MOS design, but not for bipolar design.

       In batch mode it is mostly Spice compatible, so it is often possible to use the same file for both GNUCAP and Spice.

       The analog simulation is based on traditional nodal analysis with iteration by Newton's method and LU decomposition.  An  event	queue  and
       incremental matrix update speed up the solution for large circuits (at some expense for small circuits).

       It  also  has  digital devices for mixed signal simulation.  The digital devices may be implemented as either analog subcircuits or as true
       digital models.	The simulator will automatically determine which to use.  Networks of digital devices are simulated as	digital,  with	no
       conversions to analog between gates.  This results in digital circuits being simulated faster than on a typical analog simulator, even with
       behavioral models.  The digital mode is experimental and needs work.  There will be substantial improvements in future releases.

OPTIONS

       Two command-line options are available. Only one of these may be specified. If no parameters are given, gnucap will  start  in  interactive
       mode.

       -b filename
	      execute the commands in the named file then exit (batch mode)

       -i filename
	      execute the commands in the named file then go into interactive mode

BUGS

       See /usr/share/doc/gnucap/bugs for a list of known bugs in this release.

       GNUCAP  is  an  ongoing research project.  It is being released in a preliminary phase in hopes that it will be useful and that others will
       use it as a thrust or base for their research.  I also hope for some comments that may help me direct my research.

AUTHOR

       GNUCAP is being written by Albert Davis <aldavis@ieee.org>

       This manual page was written by Jon Rabone <jkr@debian.org> and maintained by Hamish Moffatt <hamish@debian.org> for the Debian package	of
       gnucap.	For the full LaTeX documentation, please see /usr/share/doc/gnucap/manual.

Debian Project							   November 2001							 GNUCAP(1)