Introduction to OrCAD Capture and PSpice（介绍OrCAD捕获和PSpice软件）.pdfVIP

Introduction to OrCAD Capture and PSpice Professor John H. Davies September 18, 2008 Abstract This handout explains how to get started with Cadence OrCAD to draw a circuit (schematic capture) and simulate it using PSpice. There are examples of all four types of standard simulation and a selection of different plots. 1 Introduction This document introduces you to a suite of computer programs that are used to design electronic circuits. Cadence OrCAD PCB Designer with PSpice comprises three main applications. Capture is used to drawn a circuit on the screen, known formally as schematic capture. It offers great flexibility compared with a traditional pencil and paper drawing, as design changes can be incorporated and errors corrected quickly and easily. (On the other hand, it is much faster to develop the outline of a circuit using pencil and paper.) PSpice simulates the captured circuit. You can analyse its behaviour in many ways and confirm that it performs as specified. PCB Editor is used to design printed circuit boards. The output is a set of files that can be sent to a manufacturer or the electronics workshop in the Rankine Building. I do not cover PCBs in this handout. The programs communicate using files called netlists but you should never need to look at them – everything happens transparently. OrCAD is available on networked Windows PCs in the department, with up to 30 users at any one time. Unfortunately the licensing arrangements do not permit access from out- with the Rankine Building. There is a free version on a CD with Hambley’s textbook and we have a demo CD that may be copied. In principle you can download the demo version from /orcad but it is nearly 700 MB a