PSpice User Guide

PSpice User Guide

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PSpice User Guide Importing Spice Models October 2019 865 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Editing Model Editor created symbols Depending on the model definition, different symbol shapes are generated by the Model Editor. Regular symbol shapes are generated for the standard PSpice primitive models that are defined using the .MODEL statement. For devices based on a more complicated subcircuit model definition, .SUBCKT, a generic rectangle is created that interfaces with the subcircuit model. For example, if the downloaded simulation model is an OPAMP model defined using a.SUBCKT statement, the symbol generated by the Model Editor will be a generic rectangular graphic with pins attached. In such cases, you can edit the symbol created by the Model Editor. This section demonstrates the steps for editing the symbol generated using the Model Editor for an OPAMP simulation model LF442A.MOD, downloaded from the National Semiconductor's web site. LF442A is a Dual Low Power JFET Input Operational Amplifier. After you download the simulation model, use the Model Editor to generate the part symbol, as explained in the Generating Part Symbols section. 1. After the symbol generation is complete, open the Model Editor created symbol library in Capture. a. Launch Capture. From the Start menu choose Programs > Installed OrCAD release > Capture. b. From the File menu in Capture, choose Open > Library. 2. Double click on the part for which the symbol is to be modified. The part symbol appears as shown below.

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