PSpice User Guide

PSpice User Guide

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PSpice User Guide Creating and editing models October 2019 192 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Example usage: To set up device and lot tolerances on the model parameters for a particular part instance when running a Monte Carlo or sensitivity/worst-case analysis. Global models Global models are available to all designs you create. The part editor automatically creates a global model whenever you create a part with a new model definition. The Model Editor also creates global models. You can also create models externally and then manually configure the new libraries for use in all designs. To find out how to change the profile, design and global configuration of model libraries, see Changing the model library scope from profile to design, profile to global, design to global and vice versa on page 249. PSpice searches profile libraries before design libraries and design libraries before global libraries. To find out more, see Changing model library search order on page 251. Nested model libraries Besides model and subcircuit definitions, model libraries can also contain references to other model libraries using the PSpice .LIB syntax. When searching model libraries for matches, PSpice also scans these referenced libraries. Example: Suppose you have two custom model libraries, MYDIODES.LIB and MYOPAMPS.LIB, that you want PSpice A/D to search any time you simulate a design. Then you can create a third model library, MYMODELS.LIB, that contains these two statements: .LIB mydiodes.lib .LIB myopamps.lib and configure MYMODELS.LIB for global use. Because MYDIODES.LIB and MYOPAMPS.LIB are referenced from MYMODELS.LIB, they are automatically configured for global use as well.

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