#Pspice schematics not working how to#
But in the interest of completeness, a brief explanation of how to add PSpice models to your Capture parts is discussed here. A detailed explanation of PSpice model development and simulation process is outside of the scope of this text and many references are available on the subject. Making and/or obtaining PSpice libraries for making New Capture partsīefore you send a final board design to be manufactured, at some point in the design process you will want to simulate your design. To view the new part library, start Capture and select Open → Library… from the File menu in the Capture session frame. You need to use the Capture Part Editor to modify the graphical appearance of the parts, as described in the earlier examples. The PSpice Model Editor generates Capture parts with correctly named and numbered pins, but the parts are generic boxes because the PSpice Model Editor describes only how the parts function, not what they look like. The Capture parts can then be used for both PSpice simulations and PCB layout.įigure 7.37. The chapter also demonstrates how to attach PSpice models to Capture's schematic parts using PSpice models downloaded from the Internet and basic PSpice models developed from functional Capture projects. Different methods are used depending on whether a part will be used for simple schematic entry, design projects intended for PCB layout, PSpice simulations, or all of these. PCB footprints can be assigned to any of the parts regardless of how it was constructed, and the footprints can be assigned when the parts are first constructed or assigned later when the parts are actually used in a design. Three of the methods are completed from the Capture Library Manager and the fourth is initiated from the PSpice Model Editor and finished with the Capture Library Manager. Heterogeneous and homogeneous parts are developed in examples using four methods. All the parts can be the same (homogeneous), or the parts can be different (heterogeneous), and either type of part can be passive or active. Users can build custom parts and save them to existing or new libraries, modify existing parts and save them to a library, or modify and save parts to just a specific project. Capture provides many libraries of parts that one can use to build your schematic, perform simulations, and generate Printed Circuit Board (PCB) layouts. This chapter discusses how to construct Capture parts using the Capture Library Manager and Part Editor and the PSpice Model Editor. Kraig Mitzner, in Complete PCB Design Using OrCAD Capture and PCB Editor, 2009 Publisher Summary There is an encryption facility in the Model Editor that allows one to encrypt PSpice models or libraries such that the models can be used for simulation but the model definitions cannot be viewed. The Model Editor is useful for displaying the characteristic curves for models, especially if the PSpice model has been downloaded from a vendor's website. The Model Import Wizard, File > Import Wizard, allows one to view and select, or replace Capture parts (symbols) for the models in a library one at a time. The Model Editor has the facility to make a copy of an existing PSpice model from an existing library. The Model Editor is used to view text model definitions and to display graphical model characteristics and model parameters. These are the implementation: name of the model implementation path: left blank as model is searched for in the configured libraries in the simulation profile implementation type: PSpice Model and PSpice template: provides the Capture part interface to the model or subcircuit. For PSpice simulation, a Capture part needs to have four specific properties attached. The copied library is written to the project file and can be seen as one of the configured PSpice libraries in the Project Manager. This is so that the original PSpice model does not get modified. When users edit a PSpice part from Capture, a copy of the PSpice model is created in a library file, which will have the same name as the project. PSpice models can be created and edited in the PSpice Model Editor. Dennis Fitzpatrick, in Analog Design and Simulation Using OrCAD Capture and PSpice (Second Edition), 2018 Abstract
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