PSpice

By Jirawat Kanjanapitak (Tae)

Introduction

Created by CadenceTM Benefits of PSpice

Be able to solve difficult circuits Save time & easy to use Test schematic before construct a circuit

How to Start

Go to Start All Programs Orcad Family Release PSpice Student Schematics

Choosing the Components

Go to Draw Get New Part.. Shortcut : Ctrl G Type in the Name

Ex. Type “R” Choose “Place”

Or “Place & Close”

How to Draw

Choose and place all the components that you need. (Ground = GND_EARTH, Voltage Source = VDC) Tips: To flip – Ctrl P , to rotate – Ctrl R

Connect them with a “Draw Wire” option. Shortcut : Ctrl W

Specify the Values

Double click on each components

Ex. Change VDC to 5V, R1 to 2k ohms, and R2 to 3k ohms

Simulation

Click “Simulate” Click “V” and “I”

Example

Calculation Simplify the circuitR4||R3 = 2*4/(2+4) = 4/3 Ohms Assign I1, I2, and I3 current Set up equations:

0 = 5I1 + 2I2 – 10 ---1)

0 = 3I3 – 2I2 + (4/3)I3 + 20 ---2)

I1 = I3 + I2 ---3) Solve all three

Results

Ans. I1 = 0.58A.

I2 = 3.55A.

I3 = -2.98A.

Result from PSpice

Questions