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  "desc_text": "1.0) Introduction\r\n\r\n          This file describes the enhancements and changes included in \r\n          the 5.0 release of PSpice.\r\n\r\n  \t  For information regarding installation, operation, \r\n\t  and technical details about the package, you may purchase the\r\n\t  Circuit Analysis User's Guide for $50.00.\r\n\r\n\r\n2.0) Updates and Corrections to the User's Guide\r\n\r\n        All manual modifications for this version have been marked by shading\r\n        those items.\r\n\r\n       Note: Release 5.0 of Probe, Parts, and StmEd (DOS and\r\n              DOS/16M) supports display modes VGA800 and VGA1024 on\r\n              Super VGA adapters that use one of the following chipsets:\r\n\r\n                     ATI Technologies 28800\r\n                     Chips & Technologies 82C451, 82C452, or 82C453\r\n                     Video7/Headland Technologies HT208 or HT209\r\n                     Trident TVGA8900\r\n                     Tseng Labs ET4000\r\n                     Western Digital WD90C00\r\n\r\n              In addition, the VESA (Video Electronics Standards\r\n              Association) standard BIOS interface for 800x600 and\r\n              1024x768 16-color modes is supported (DOS 640Kb version\r\n              only).  If your adapter manufacturer also supports this\r\n              standard, a VESA BIOS extension will have been included\r\n              in the software utilities provided with your video adapter.\r\n              This will be either an installable device driver (called\r\n              VESA.SYS or something similar) or a Terminate-and-Stay-\r\n              Resident program (called VESA.COM, VESA.EXE, or something\r\n              similar).  To use the VESA interface, you must install the\r\n               VESA BIOS extension prior to running Probe, Parts, or StmEd.\r\n\r\n       DIGITAL SIMULATION\r\n              The Multi-Bit Digital-to-Analog Converter switching time \r\n              model parameter default values have been modified.  The\r\n              default value for TSWMN, TSWTY, and TSWMX is now 10ns \r\n              instead of 0.\r\n\r\n              Ten new one-shots have been added to the digital library: the\r\n              121, 122, and 123 TTL-7400 series parts, and the CD4098B and\r\n              CD4538B.  The TTL-7400 series parts are included in the pin\r\n              list at the end of the Digital Simulation chapter of the \r\n              User's Guide, and the pin list for both the CD4098B and \r\n              CD4538B is Reset, TR_POS, TR_NEG, Q, and QBAR.\r\n\r\n       SUN (NETWORK LICENSE VERSION)\r\n              If the -q switch is used and if all copies of the program are\r\n              checked out, you are placed in a queue waiting for the next \r\n              available license.\r\n\r\n       DOS/16M (Extended-DOS VERSION)\r\n\t      The description on page 17 of the Circuit Analysis User's\r\n\t      Guide, section 2.1.1.6.5 Virtual Memory, is misleading.  The\r\n\t      DOS16VM environment variable specifies the TOTAL size of\r\n\t      virtual memory, NOT the size of the swap file.  Any difference\r\n\t      between the value set by DOS16VM and memory actually available\r\n\t      is made up for by the swap file.  For example, if you set\r\n\t      DOS16VM=4000 and your PC has 3Mb of extended memory, then a\r\n\t      swap file of about 1Mb will be created for the duration of\r\n\t      the simulation, etc.\r\n\r\n\t      Also, you may use the suffix \"M\" with the DOS16VM value to\r\n\t      denote megabytes (1Mb = 1024Kb).\r\n\r\n\r\n3.0) Program modifications since version 4.05.\r\n\r\n          PSPICE\r\n              1. The Probe data file name no longer defaults to PROBE.DAT.\r\n                 When a PSpice simulation successfully completes and there\r\n                 is a .PROBE statement in the circuit file, a Probe data\r\n                 file will be generated and will have the same name as\r\n                 the circuit file with a .DAT extension.  For example, if\r\n                 you ran PSpice with EXAMPLE1.CIR, your Probe data file\r\n                 will be named EXAMPLE1.DAT.  You may also override the\r\n                 default data file name by listing it as the third\r\n                 argument in your PSpice command statement.\r\n\r\n                 This file name is stored in the file PROBEDAT.NAM.\r\n                 Therefore, if Probe is executed without a data file name,\r\n                 Probe will read the file name from PROBEDAT.NAM.\r\n\r\n              2. There are two new model parameters for the GaAsFET model:\r\n                 VDELTA (capacitance transition voltage) and VMAX \r\n                 (capacitance limiting voltage).\r\n\r\n              3. There is one new model parameter for the Inductor Coupling\r\n                 (Transformer Core) model: Gamma.  A, C, K, and alpha also\r\n                 have some description modifications.\r\n\r\n              4. There are two new parameters for the .OPTIONS statement:\r\n                 DIGMNTYSCALE and DIGTYMXSCALE.\r\n\r\n              5. Current mode Pulse-Width Modulator (PWM) models (in \r\n                 SWIT_REG.LIB) are available and require both the Analog \r\n                 Behavioral Modeling and Digital Simulation options.\r\n\r\n              6. Unijunction Transistor (UJT) models (in THYRISTR.LIB) are \r\n                 available and require the Analog Behavioral Modeling option.\r\n\r\n\r\n       Analog \r\n       Behavioral\r\n       Modeling 1. The capability to simulate Chebyshev filters has been added\r\n                 to Analog Behavioral Modeling.  This allows the user to\r\n                 implement a Chebyshev filter based in terms of a set of \r\n                 frequency characteristics.\r\n\r\n\r\n          PROBE\r\n              1. If Probe is executed without specifying a data file name, \r\n                 it will read the file name from the file PROBEDAT.NAM.  If \r\n                 PROBEDAT.NAM does not exist, Probe will look for PROBE.DAT,\r\n                 and then PROBE.TXT.  If neither PROBE.DAT or PROBE.TXT\r\n                 exists, then Probe will prompt the user for the data file \r\n                 name.\r\n\r\n              2. Six new display device drivers have been added: GenericVGA,\r\n                 IBMVGAMono, NECHiClrMou, NECNrmMono, VGA800, and VGA1024.\r\n\r\n              3. Two new printer drivers have been added: HP_GL2-PCL and\r\n                 HPLJE.\r\n\r\n              4. The capability to label the coordinates of a cursor has\r\n                 been added as an option on the Cursor Menu.\r\n\r\n              5. There is now the capability of having multiple y axes.  The\r\n                 menu options are part of the Y Axis Menu.\r\n\r\n              6. The Performance Analysis feature containing the Goal \r\n                 Functions has been added to the X Axis Menu.\r\n\r\n                 Performance_analysis allows adding traces that show how a \r\n                 derived value changes during multiple PSpice runs.  The \r\n                 derived value is extracted from one or more PSpice waveforms \r\n                 by using search commands, marking points, and evaluating\r\n                 expressions of marked points.  For example, you could create \r\n                 a plot that shows propagation delay as a function of \r\n                 temperature, or pulse-width as a function of some component \r\n                 value, or frequency of the output as a function of a stepped\r\n                 parameter.\r\n\r\n              7. For EGA, VGA, and Super VGA displays, the colors for traces, \r\n                 cursors, background, foreground, etc., can now be defined by \r\n                 the user from within Probe from the Analog Plot Menu.\r\n\r\n\r\n          DIGITAL SIMULATION\r\n          \r\n              1. There are 8 new parameters for the UIO model: TSWLH1, \r\n                 TSWLH2, TSWLH3, TSWLH4, TSWHL1, TSWHL2, TSWHL3, and\r\n                 TSWHL4.\r\n\r\n              2. There are now two types of stimulus devices: the stimulus\r\n                 generator (STIM) which uses simple commands to generate a \r\n                 wide variety of waveforms; and the new file stimulus \r\n                 (FSTIM), which obtains the waveforms from an external file.\r\n\r\n4) Install program for PSpice\r\n\r\n     The installation program used to install PSpice, INSTALL, is\r\n     licensed software provided by Knowledge Dynamics\r\n     Corporation, P.O. Box 1558, Canyon Lake, Texas 78130-1558\r\n     (USA).  INSTALL is Copyright (c) 1987-1991 by Knowledge\r\n     Dynamics Corporation which reserves all copyright protection\r\n     worldwide.  INSTALL is provided to you for the exclusive\r\n     purpose of installing PSpice.  MicroSim Corporation is\r\n     exclusively responsible for the support of PSpice, including\r\n     support during the installation phase.  In no event will\r\n     Knowledge Dynamics Corporation be able to provide any\r\n     technical support for PSpice."
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