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Text File | 1992-02-12 | 15.6 KB | 490 lines | [TEXT/MSWD]

DESIGN CENTER 5.1 EVALUATION VERSION 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 about 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" If you would like to purchase the complete production Version 5.1 of any of the Design Center packages, and the accompanying Analysis set of manuals, please contact MicroSim Corporation at (800) 245-3022, or FAX (714) 455-0554. Please note that the 5.1 Evaulation version is limited to 64 nodes and 10 active component (1 opamp = 2 active components). 2.0) PSpice 2.1) DOS Only 1. 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 isted 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 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: Average Power Supply Model VMSSDCM - Voltage mode small signal discontinuous conduction mode, 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.