La creación de un esquemático del diseño en OrCAD Capture

Objective

To create a schematic design in OrCAD Capture. In this chapter, you will be introduced to basic design steps, such as placing a part, connecting parts using wires, adding ports, generating parts, and so on.

The steps for preparing your design for simulation using PSpice and for taking your design for placement and routing to the PCB board layout tool are also covered in this chapter.

Design example

In this chapter, you will create a full adder design in OrCAD Capture. The full adder design covered in this tutorial is a complex hierarchical design that has two hierarchical blocks referring to the same half adder design.

Duration:

40 minutes

Creating a design in Capture

Guidelines

When creating a new circuit design in OrCAD Capture, it is recommended that you follow the guidelines listed below.

1.

Avoid spaces in pathnames and filenames. This is necessary to get your design into downstream products, such as OrCAD PCB Editor or OrCAD PCB Router.

2.

Avoid using special characters for naming nets, nodes, projects, or libraries.

While naming nets, use of the following illegal characters might cause the netlister to fail:

leading and trailing white spaces

! (exclamation mark)

' (single-quote)

Creating a project

To create a new project, we will use Capture's Project Wizard. The Project Wizard provides you with the framework for creating any kind of project.

1.

Launch Capture.

2.

From the File menu, choose New - Project.

3.

In the New Project dialog box, specify the project name as FullAdd.

4.

To specify the project type, select Analog or Mixed A/D.

Note: An Analog or Mixed A/D project can easily be simulated using PSpice. It also ensures that your design flows smoothly into the PCB layout tool for your board design.

5.

Specify the location where you want the project files to be created and click OK.

The Create PSpice Project dialog box appears.

6.

In the Create PSpice Project dialog box, select Create a blank project.

Note: When you create a blank project, the project can be simulated in PSpice, but libraries are not configured by default. When you base your project on an existing project, the new project has same configured libraries.

7.

Click OK to create the FullAdd project with the above specifications.

In case you already have a schematic design file (.dsn) that you want to simulate using PSpice, you need to create an Analog or Mixed A/D project using the File - New - Project command and then add your design to it.

The

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