gnucap(1) [debian man page]
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)
Check Out this Related Man Page
XCLOCK(1) General Commands Manual XCLOCK(1) NAME
xclock - analog / digital clock for X SYNOPSIS
xclock [ -help ] [ -analog ] [ -digital ] [ -brief ] [ -chime ] [ -hd color ] [ -hl color ] [ -update seconds ] [ -strftime format ] [ -padding number ] DESCRIPTION
The xclock program displays the time in analog or digital form. The time is continuously updated at a frequency which may be specified by the user. OPTIONS
Xclock accepts all of the standard X Toolkit command line options along with the additional options listed below: -help This option indicates that a brief summary of the allowed options should be printed on the standard error. -analog This option indicates that a conventional 12 hour clock face with tick marks and hands should be used. This is the default. -digital or -d This option indicates that a 24 hour digital clock should be used. -brief This option indicates that the digital clock should only display the hours and minutes fields. The default is to show the full time and date information. -utime or -d This option indicates that a digital clock should display seconds since the Epoch (in format '970012340 seconds since Epoch' instead of a standard 24-hour time. -strftime format This option allows an strftime(3) format string to be specified for the digital clock's display. -twelve This option indicates that a digital clock should display the time in twelve hour format. -twentyfour This option indicates that a digital clock should display the time in twenty-four hour format. This is the default when a digital clock is used. -chime This option indicates that the clock should chime once on the half hour and twice on the hour. -hands color (or -hd color) This option specifies the color of the hands on an analog clock. The default is black. -highlight color (or -hl color) This option specifies the color of the edges of the hands on an analog clock, and is only useful on color displays. The default is black. -update seconds This option specifies the frequency in seconds at which xclock should update its display. If the clock is obscured and then exposed, it will be updated immediately. A value of 30 seconds or less will enable a second hand on an analog clock. The default is 60 seconds. -padding number This option specifies the width in pixels of the padding between the window border and clock text or picture. The default is 10 on a digital clock and 8 on an analog clock. X DEFAULTS
This program uses the Clock widget. It understands all of the core resource names and classes as well as: width (class Width) Specifies the width of the clock. The default for analog clocks is 164 pixels; the default for digital clocks is whatever is needed to hold the clock when displayed in the chosen font. height (class Height) Specifies the height of the clock. The default for analog clocks is 164 pixels; the default for digital clocks is whatever is needed to hold the clock when displayed in the chosen font. update (class Interval) Specifies the frequency in seconds at which the time should be redisplayed. foreground (class Foreground) Specifies the color for the tic marks. The default is depends on whether reverseVideo is specified. If reverseVideo is specified the default is lwhite, otherwise the default is black. hands (class Foreground) Specifies the color of the insides of the clock's hands. The default is depends on whether reverseVideo is specified. If reverseV- ideo is specified the default is lwhite, otherwise the default is black. highlight (class Foreground) Specifies the color used to highlight the clock's hands. The default is depends on whether reverseVideo is specified. If reverseVideo is specified the default is lwhite, otherwise the default is black. analog (class Boolean) Specifies whether or not an analog clock should be used instead of a digital one. The default is True. twentyfour (class Boolean) Specifies whether or not a digital clock should display the time in twenty-four hour format. The default is True. chime (class Boolean) Specifies whether or not a bell should be rung on the hour and half hour. padding (class Margin) Specifies the amount of internal padding in pixels to be used. The default is 8. font (class Font) Specifies the font to be used for the digital clock. Note that variable width fonts currently will not always display correctly. WIDGETS
In order to specify resources, it is useful to know the hierarchy of the widgets which compose xclock. In the notation below, indentation indicates hierarchical structure. The widget class name is given first, followed by the widget instance name. XClock xclock Clock clock ENVIRONMENT
DISPLAY to get the default host and display number. XENVIRONMENT to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property. FILES
/usr/X11R6/lib/X11/app-defaults/XClock specifies required resources SEE ALSO
X(7x), xrdb(1), time(3C) BUGS
Xclock believes the system clock. When in digital mode, the string should be centered automatically. AUTHORS
Tony Della Fera (MIT-Athena, DEC) Dave Mankins (MIT-Athena, BBN) Ed Moy (UC Berkeley) X Version 11 Release 6.6 XCLOCK(1)