OrCAD PSpice, Capture, and Probe Tutorial



PSpice Tutorial

Contents

OrCAD PSPice, Capture, and Probe Tutorial (introduction)……………………….1

How to Get Started……………………………………………………………………..3

Learning Capture………………………………………………………………………4

Project Manager………………………………………………………………………..4

Schematic Page Editor…………………………………………………………………6

Some Words About Editing…………………………………………………………..11

Let’s Do Some Circuit Analysis!……………………………………………………..18

DC Sweep Analysis……………………………………………………………………25

Time Domain (Transient) Analysis…………………………………………………..30

AC Sweep/Noise Analysis……………………………………………………………..33

PSpice and Active Components………………………………………………………39

Monte Carlo Analysis…………………………………………………………………………………46

Appendix A

OrCAD PSpice, Capture, and Probe Tutorial

Last Update: 18-Aug-00

© 2000 by Don Peter, Seattle Pacific University

Introduction

With the recent transition of the popular PSpice circuit analysis tool from MicroSim Corp. to OrCAD, inc., there have been significant changes to it, especially with regard to its human interface, i.e., the way a user interacts with and operates the software. This tutorial has been written to aid those who either have never used PSpice before or have only used the MicroSim version of it (e.g., MicroSim Version 8). Because of the human interface differences with past versions, even those with prior PSpice experience will benefit from covering this material. This document is based on OrCAD Release 9.1.

Scope

This tutorial is by no means exhaustive. The core tool, PSpice, along with its companions Capture (schematic capture) and Probe (graphical output of analysis results) are sophisticated and extensive software packages whose full content cannot possibly be covered in a document such as this. The goal, instead, is to provide the user with a fairly brief guide that will enable him/her to use this powerful package to model and analyze circuits covered in their engineering education experience at SPU. Extensive help can be accessed via the Help menus provided in the tools. Specifically, as part of the Help in Capture there a menu item called Learning Capture, which has lessons and exercises you may use for supplementary learning (Figure 1). In addition, complete Online manuals are available via one of the the OrCAD Release 9.1 menu selections (Figure 2).

Contents

We will begin with an explanation of (1) how to get started. There are a few pointers you will need to follow in order to be able to successfully start the program and analyze your circuit. Next, we will look at (2) Capture, the tool that allows you to create a schematic. We will look at the working environment of menus and toolbars and then explore how to actually build a schematic of your own. Once a schematic has been built, we will be ready to set up (3) an analysis for that circuit. This will be done using the core PSpice portion of OrCAD. We will look at how to perform the following analyses: Bias Point, DC Sweep, Transient, and AC. We will also learn how to set up a parametric secondary analysis as part of one of the four main analyses types. As part of the learning of PSpice use, we will investigate the (4) capabilities of Probe, which is the main tool that makes doing PSpice analyses fun by rendering the results in attractive graphical form.

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Figure 1

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Figure 2

>>>>>> Let’s Get Started! ................
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