MicroSim Corporation's Design Center Version 5.3 
New! - Histograms, HP700 Support, Interface to PADS & Protel, and More!!!

November 30, 1992 -- (Irvine, CA) MicroSim Corporation continues to enhance
and strengthen the Design Center by introducing an interface to the PADS
and Protel board layout packages, HP700 support, device temperature
customization, histograms, multiple plot windows for waveform analysis,
hard copy enhancements, tracking/displaying of simulator (PSpice)
generated condition messages and editing of model definitions in the
schematic capture program (Schematics) to support Monte Carlo analysis.

Designers can now interface the Design Center's schematic capture program
to the PADS and Protel board layout packages. The layout netlist can be
used as input to the appropriate layout package. During the layout
process, changes may be made which the user wants reflected back into the
schematic. These changes can be read directly from the PADS ECO file, and
used to automatically update (back annotate) the schematic.

Schematics also now supports Monte Carlo, worst-case, and modeling editing
by providing a mechanism for direct manipulation of model and subcircuit
definitions. Schematics allows the user to edit model definitions, create
new models, associate model definitions with symbols, or derive new model
definitions from existing ones.

PSpice now allows for the customization of model temperature for passive
and semiconductor devices. There are two levels of temperature attributes
which can be customized on a model by model basis; the temperature at
which the model parameters are assumed to be measured and current device
temperatures.

The graphical waveform analyzer (Probe) now displays histograms. The Monte
Carlo statistical analysis supported in PSpice results in several "runs"
of any DC sweep, AC response, or transient analysis specified for
simulation. As each standard analysis is rerun, model parameter values are
varied within specified tolerances. The results can be analyzed by
user-defined functions to measure any arbitrary characteristic of each
waveform. The distribution of this characteristic applied to the waveforms
randomly generated by the Monte Carlo analysis can be viewed as a
histogram.

With the addition of multiple plot windows, graphical results from
different simulations can be displayed simultaneously in different Probe
windows. Multiple plot windows is also useful to display different
analyses results for the same circuit simultaneously.

When a PSpice generated data file is read into Probe, there is now a
facility to check for simulation-time conditions and errors which may have
occurred. Probe warns the user of any errors, and gives them the option of
examining the details.

MicroSim is pleased to announce its support of the HP700 workstation. Now,
all of the functionality of the Design Center System 1 is available on the
HP700. With direct program management, the user can enter any combination
of analog and digital circuitry for simulation and graphical waveform
analysis.

The Design Center continues to be unique in the CAD/CAE industry for its
"native" support of both analog and digital circuits at all levels of the
design process, including simulation with PSpice. The analog and digital
algorithms are tightly coupled within the same program. Hence, only one
circuit need be defined, only one simulation need be run, and only one
graphical interface is needed to analyze the results of a mixed analog and
digital circuit.

There are three Design Center configurations from which to choose. Our
full-featured configuration with schematic capture is available on
Microsoft Windows and Sun OpenWindows ranging from $8,200 to $15,900
depending upon platform. Two reduced configurations are available without
schematic capture. On DOS (the only platform limited to analog design) and
DOS/16M platforms, the Design Center is available with a shell manager
that coordinates circuit file editing, PSpice simulations, graphical
waveform analysis, and stimulus generation.

This configuration ranges from $2,450 to $6,750 depending upon platform.
Our final configuration allows for direct management of the Design Center
programs, with prices ranging from $4,950 to $17,900 depending upon
platform.

Any Design Center configuration can be purchased with these options:

-- Device equations, which supplies partial source code that can be
modified to tailor a device's behavior to your application ($350 to $3,600
depending upon platform).

-- Filter synthesis, for realizing active and passive filters supporting RC
active, switched-capacitor, and LC ladder architectures ($900 on the
IBM-PC or Macintosh).

For more information about MicroSim Corporation's Design Center, please
call us at (714) 770-3022, or toll free at (800) 245-3022.

MicroSim Corp, 20 Fairbanks, Irvine, CA 92718
714-770-3022,  800-245-3022,  Fax: 714-455-0554

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