Esquema De Montagem De Circuitos No Pspice

Chapter Overview

The examples in this chapter provide an introduction to the

methods and tools for creating circuit designs, running

simulations with PSpice, and analyzing simulation results using

Probe. All analyses are performed on the same example circuit

to clearly illustrate analysis setup, simulation, and result

analysis procedures for each analysis type.

This chapter includes the following sections:

Example Circuit Creation on page 2-2

Bias Point Analysis on page 2-6

DC Sweep Analysis on page 2-10

Transient Analysis on page 2-16

AC Sweep Analysis on page 2-20

Parametric Analysis on page 2-24

Probe Performance Analysis on page 2-30

2-2 Simulation Examples

Example Circuit

Creation

This section describes how to use MicroSim Schematics to

create the simple diode clipper circuit shown in Figure 2-1.

Figure 2-1 Diode Clipper Circuit

To open a new schematic window

1 Start Schematics. If Schematics is already running, be sure

you are in the schematic editor.If you are in a blank

schematic window (indicated by “Schematicn” in the title

bar at the top of the window), you can begin creating the

circuit.

If you need to open a new schematic window, from the File

menu, select New.

To place the voltage sources

1 From the Draw menu, select Get New Part to display the

Part Browser dialog box.

2 In the Part Name text box, type VDC.

3 Click Place & Close.

or press C+g

If you have enough room on your

screen, click Place to leave the

Part Browser dialog box open.

Example Circuit Creation 2-3

4 Move the pointer to the correct position on the schematic

(see Figure 2-1) and click to place the first source.

5 Move the cursor and click again to place the second source.

6 Right-click to cancel placement mode.

To place the diodes

1 Go to the Part Browser dialog box.

2 In the Part name text box, type D1N39* to display a list of

diodes.

3 Click D1N3940.

4 Click Place (to leave the dialog box open) or Place & Close

(to close the dialog box).

5 Press C+r to rotate the diode outline to the correct

orientation.

6 Click to place the first diode (D1), then click to place the

second diode (D2).

7 Right-click to cancel placement mode.

To move the text associated with the diodes (or

any other object)

1 Click the text once to select it.

2 Drag the text to a new location.

To place the other components

Follow similar steps as described for the diodes to place the

components listed below. The symbol names you need to type

in the Part name text box of the Part Browser dialog box are

shown in parentheses:

· resistors (R)

· capacitor (C)

· ground symbols (EGND)

· bubble symbols (BUBBLE)

If needed, click to redisplay

the Part Browser dialog box.

When placing components:

· Leave space to connect the

components with wires.

· You will change device

names and values that don’t

match those shown in

Figure 2-1 later in this

section.

To refresh the schematic display,

select Redraw from the View

menu or press C+l.

2-4 Simulation Examples

To connect the components

1 From the Draw menu, select Wire to enter wiring mode. The

cursor changes to a pencil.

2 Click the connection point (the very end) of the pin on the

bubble at the input of the circuit.

3 Click the nearest connection point of the input resistor R1.

4 Connect the other end of R1 to the output capacitor.

5 Connect the diodes to each other and to the wire between

them:

a Click the connection point of the anode for the lower

diode.

b Move the cursor straight up and click the wire between

the diodes.