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THE DESIGN CENTER 5.1
1.0) Introduction
This file describes the new features and changes for the 5.1
release of the Design Center programs: PSpice, Probe,
Stimulus Editor, and Parts. The platforms covered in this
file include: non-windows IBM-PC and NEC-PC with DOS/16M,
Windows 3.0 IBM-PC and NEC-PC, Macintosh, Sun, DECstation,
and VAX/VMS. Most of the material in this file will direct
you to the location in the analysis manuals where detailed
information on each subject can be found.
The analysis documentation referenced in this README.DOC
consists of the following manuals:
"Analysis System Setup Manual"
"Analysis User's Guide"
"Analysis Reference Manual"
2.0) PSpice
2.1) DOS Only / Install Program for PSpice
The installation program used to install PSpice, INSTALL, is
licensed software provided by Knowledge Dynamics Corporation,
P.O. Box 1558, Canyon Lake, Texas 78130-1558 (USA). INSTALL
is Copyright (c) 1987-1992 by Knowledge Dynamics Corporation
which reserves all copyright protection worldwide. INSTALL
is provided to you for the exclusive purpose of installing
PSpice. MicroSim Corporation is exclusively responsible for
the support of PSpice, including support during the
installation phase. In no event will Knowledge Dynamics
Corporation be able to provide any technical support for
PSpice.
2.2) Table 4 on page 52 of the Analysis Reference Manual
lists two new intrinsic functions for PSpice expressions.
Please refer to the manual for detailed information regarding
the results of each expression.
The new functions are:
TABLE(x,x1,y1,x2,y2,...xn,yn)
LIMIT(x,min,max)
2.3) To link the DOS/16M version, you must use the Microsoft
segment-executable linker that comes with the Microsoft C
compiler. To link the DOS version, we recommend that you
use the Plink86plus linker (version 2.24) from Intersolve.
For more information contact:
Life Boat Distribution Services
1163 Shrewsbury Avenue
Shrewsbury, New Jersey 07702
(800) 445-7899
2.4) Fourier Analysis (.FOUR command)
The .FOUR command for Fourier analysis now allows an
argument to specify the number of harmonics you wish
to have calculated.
The general format is:
.FOUR <frequency value> [no. harmonics value] <output variable>*
For example:
.FOUR 60Hz 20 V(17)
If the number of harmonics is not specified, the DC
component, fundamental, and 2nd through 9th harmonics
are calculated by default.
Refer to Chapter Three, page 62 of the Analysis Reference
Manual for information on the .FOUR command.
2.5) Lossy Transmission Line Model
A Lossy Transmission Line model has been implemented in
version 5.1. Using the distributed model approach rather
than the the traditional lumped model approach allows you
to simulate lossy lines in a significantly reduced amount
of time.
The general format is:
T<name> <A port (+) node> <A port (-) node>
+ <B port (+) node> <B port (-) node>
+ LEN=<value> R=<value> L=<value>
+ G=<value> C=<value>
For examples refer to Chapter Four, page 127 "Transmission
Line" (T device), of the Analysis Reference Manual.
2.6) Device Libraries
2.6.1) Digital Library Additions
The new library files added to the Digital Library are:
dig_pal.lib - Programmable Array Logic devices
Note: PAL20RA10 is listed in the library list,
but is not currently available in this library.
dig_gal.lib - Generic Array Logic devices
dig_ecl.lib - Emitter Coupled Logic 10K and 100K devices
Note: 100181 is listed in the library list, but is not
currently available in this library.
The devices and their pin lists are provided in tables in the
Analysis Reference Manual. These tables can be found at the
end of Chapter Five on pages 288-292.
2.6.2) Analog Library Additions
The following libraries have been added to the 5.1 version
of PSpice:
europe.lib - European-manufactured semiconductor devices
harris.lib - RCA/GE/Harris power-transistor devices
swit_rav.lib - Averaging power supply devices
Note: The Average Power Supply Model VMSSDCM is listed in
the library list, but is not currently available in this
library.
2.6.2.1) EUROPE.LIB
Some of the devices in EUROPE.LIB and their counterparts in
the regular libraries (eg. DIODE.LIB) have identical names.
In order for PSpice to find the correct model/subcircuit
definition, you must ensure that the appropriate library is
specified first in NOM.LIB.
If EUROPE.LIB is specified before another model library
containing duplicate names, none of the duplicate devices
in the second library will be accessed. Therefore, if
D1N4148 and D1N4149 exist in both EUROPE.LIB and DIODE.LIB,
PSpice would take both the D1N4148 and D1N4149 definitions
from EUROPE.LIB which is listed before DIODE.LIB in NOM.LIB.
To avoid this from happening you can extract the specific
devices from the desired libraries and put them into a library
that is listed before any other library containing the device
with the duplicate name.
If you are using Schematics, the order of symbol libraries
specified in the [SCHEMATICS LIBS] section of msim.ini should
reflect the order of model libraries specified in NOM.LIB.
2.7) Inertial and Transport Delay
PSpice uses two different types of internal delay functions when
simulating the digital portion of the circuit: "inertial delay"
and "transport delay". The application of these concepts is
embodied within the implementation of the digital primitives
within PSpice. Therefore, they are not user-selectable.
To obtain detailed information on Inertial and Transport Delay,
please refer to the Analysis Reference Manual, Chapter Four,
Section 4.8.4.4 (pages 100-101).
2.8) Digital Worst-case Timing Simulation
With "digital worst-case timing simulation" (new for the
5.1 release), you will be able to use PSpice to evaluate
the timing behavior of your digital and mixed analog/digital
designs using a full range of component propagation delay
tolerances. In Chapter Five of the Analysis User's Guide
you will find information on digital worst-case timing
simulation, starting with Section 5.5
on page 135. The remaining sections and their subjects are:
5.5.1 Simulator Representation of Timing Ambiguity
5.5.2 Simulator Propagation of Timing Ambiguity
5.5.3 Identification of Timing Hazards
5.5.3.1 Convergence Hazard
5.5.3.2 Critical Hazard
5.5.3.3 Cumulative Ambiguity Hazard
5.5.3.4 Reconvergence Hazard
5.5.4 Glitch Suppression Due to Inertial Delay
5.5.5 Methodology
2.9) PSpice as a Native Windows 3.0 Program on the IBM-PC and NEC-PC
The general operating instructions for Windows PSpice as a
native Windows 3.0 program can be found in Chapter Two,
Section 2.3.1.2, (pages 16-20) of the Analysis Reference Manual.
Windows PSpice will run on any IBM 386 or 486 based PC, IBM-PC
compatible computers, or NEC-PC running the Design Center
package with schematic capture. This program requires a
minimum of one megabyte of memory available in the Windows
environment, plus the amount needed to run your particular
circuit files.
2.9.1) Windows PSpice Menus
To assist you in navigating through the Windows PSpice menus
here is a list of the new menus and the commands within each.
(a) HELP MENU
About PSpice...
(b) FILE MENU
Open
Terminate Simulation
Save Window Configuration
Exit to Windows
(c) FONT MENU
System
ANSI Fixed
ANSI Variable
OEM
Other Fonts...
(d) COLOR MENU
Text Color
Background Color
Error Text Color
Error Background Color
(e) DISPLAY MENU
Immediate
Fast
Slow
3.0) Probe
3.1) Analog and Digital Plots
For the 5.0 and earlier releases of Probe, you could have
0, 1, or more analog plots, and 0 or 1 digital plots.
For the 5.1 release of Probe, you can have 0, 1, or several
plots. Each plot can be analog only, digital only, or both
analog and digital. When a plot is both analog and digital,
the analog traces are displayed in the bottom part of the
plot with a dashed border, and the digital traces are
displayed in the top part of the plot with a solid border.
When you start Probe with a .dat file that has both analog and
digital data, an empty analog plot is shown. After adding
traces, the plot will have both analog and digital parts if
both analog and digital traces have been displayed.
Digital plot size is now specified as a percentage of the
overall plot size. In Probe 5.0, there was only one digital
plot and the digital plot size was specified as the number of
digital traces the digital plot could display.
3.2) Menus
The menus have been modified to improve the command flow for
displaying both analog and digital waveforms on the same plot.
The Analog Plot Menu and the Digital Plot Menu are now combined.
This new menu structure includes the digital_Trace_commands
which allow the user to move, insert, change, and scroll
digital traces.
3.3) Remove_trace
Changes have been made to allow one or more traces to be
selected for removal, before actually removing the traces
(and doing the sometimes time consuming redraw of the
display).
The traces to be removed may be selected by using either the
mouse or the arrow keys and space bar. Selected traces are
marked with a '<' to the right of the trace name
e.g. V(4)< ).
Using the mouse:
Clicking on the trace name the first time selects
the trace.
Clicking on the trace again deselects it.
Using the arrow keys and space bar:
When select is chosen, the first trace is
highlighted. The right and left arrows will
move the highlight to other trace names.
The space bar selects/deselects the trace.
Also, an Undelete command has been added. It will redisplay
the last trace(s) deleted since entering the Remove_trace menu.
Undelete only appears in the menu if traces have been deleted
since entering the Remove_trace menu.
NOTE: because of these changes, Probe command files created by
Probe 5.0 or earlier, will no longer work for deleting traces.
3.4) Add Trace
Add_trace now allows you to specify analog traces, digital
traces, or both at the same time. You cannot create an
expression that combines analog and digital nodes to create
one trace.
Digital expressions have been added, and the syntax for
specifying a bus has changed.
A digital signal can be any digital node in the data file or
a boolean expression involving digital nodes. Please see
page 312 of the Analysis Reference Manual for information
on digital signals and digital expressions.
3.5) Goal function search commands:
Limited expressions have been added for LEVEL(val),
and XVALUE(val).
In 5.0, val could be:
a floating number (e.g., 1e5, 100n, 1, ...)
a percent (eg 50%)
a marked point (e.g., x1, y1, ...)
In 5.1, val can also be:
a db value relative to max or min
max-3db or -3db => 3db below maximum range
min+3db or 3db => 3db above minimum range
a value relative to max or min
max-3 => maximum range - 3
min+3 => minimum range + 3
a relative db value
.-3db => 3db below lastvalue
.+3db => 3db above lastvalue
a relative value
.-3 => lastvalue - 3
.+3 => lastvalue + 3
where lastvalue is the x or y value found by the last search
command. For the first search command, lastvalue is the
starting point for the first search command.
Refer to page 320 of the Analysis Reference Manual for
more information on Search_commands.
3.6) Probe as a Native Windows 3.0 Program on the IBM-PC and NEC-PC
Probe running as a Windows 3.0 application, is only available
in the Design Center package with schematic capture. Windows
Probe provides similar functionality included in non-windows
Probe, implemented by utilizing pull-down menus and dialog
boxes.
To help you locate Probe functions, the following Windows
Probe main menus and their command items are provided. For
details on the command defintions see Chapter Six, Section
6.3.2.1 (page 342) of the Analysis Reference Manual.
FILE MENU ANALYSIS MENU TRACE MENU
Load AC Add
Print DC Remove
Printer Setup Transient Macro
Log Commands Symbols
Run Commands Mark Data Points
Exit
About Probe
AXIS MENU ZOOM MENU CURSOR MENU
Set Range Display Pointer Display
Add Y Normal Peak
Delete Y In Trough
Color Out Slope
Title Area Min
Y Log Scale Max
X Log Scale Search Commands
X Variable Next Transition
Restrict Data Previous Transition
Fourier
Performance Analysis
DISPLAY MENU
Digital Plot Size
Save/Restore
Copy to Clipboard
Redraw
In general, all commands are available at all times, provided
that the command makes sense. For instance, Remove in the
trace menu is enabled only when there are traces to remove.
Some options, such as Fourier, are toggles which can be
either on or off. On is denoted by a check mark next to the
command, and off is denoted by the absence of the check mark.
Some commands require some prior action before they will work.
Trace Remove: You must first select the traces to remove.
This is done by pointing at the name of the trace in the
legend and clicking the left mouse button. You may
select multiple traces by holding down the shift key while
selecting the trace names.
Zoom commands: You must enable the zoom pointer before you
zoom in or out. You may move the zoom pointer with the
mouse by clicking over a point of interest. Zooming in
and out works by a factor of two around the zoom pointer.
If you "click and drag" (press and hold the mouse button,
move the mouse, release the button), you can define an
area to zoom into using the Zoom Area command. Zoom Normal
is always available.
Cursor commands: You must display the cursors before you can
use any cursor commands. If the command has implied
direction, such as Peak, then the direction moved is the
same as the last direction moved, or right if there was no
last direction. Likewise, the cursor moved will be the same
as the last cursor moved. Next Transition and Previous
Transition are not available in the beta version.
Features not available through the menus:
Digital Scrolling: To scroll the digital plot, use the mouse
to click on the "+" signs in the digital legend. They will
only appear if there are additional digital traces not
currently displayed.
Compatibility with non-windows Probe:
Log/Command Files: These are specific to the windows version.
Macro Files (.mac): Compatible
Display Files (.dsp): Compatible
Data Files (.dat): Compatible
Data Files (.txt): CSDF data files are not available in the
beta version.
Goal Function Files (.gf): Compatible
4.0) Parts
If you are running on an NEC-PC or IBM-PC (or compatible)
then you will need 510 kilobytes of conventional memory free
to run Parts.
4.1) Non-linear Magnetic Core Model
A non-linear magnetic core model has been added and uses
a derivative of the Jiles-Atherton formulation to provide
a closed-form, analytic solution. For detailed information
please refer to Chapter Eight, page 414, of the Analysis
Reference Manual.