Monthly Archives: November 2014

OrCAD PSPICE – AC Parametric Sweeps

dBV units

AC Parametric Sweeps:   In order to learn about the frequency response of circuits, an AC parametric sweep can be performed. This is a different type of analysis than transient analysis as far as PSPICE is concerned, because instead of calculating the instantaneous values for voltages and currents, PSPICE instead …

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OrCAD PSPICE – Transient Analysis

Transient Analysis

Transient Analysis   In PSPICE, the transient analysis option is used to do both steady and transient analysis of circuits. This can involve both AC and DC signal sources. Steady-state AC time-domain results are obtained by the same setup as for transient analysis. Let’s try it out. 1. Start a …

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OrCAD PSPICE – Debugging PSPICE Simulation Errors

Debugging PSPICE Simulation

Debugging PSPICE Simulation Errors Sooner or later (probably sooner), you’ll get a nasty error message from the simulator. Because this program uses a PSPICE core to do the actual work, you need to be able to locate and decipher the actual error within the OUTPUT file, then correct it in …

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OrCAD PSPICE – DC Static Analysis Example

SOURCE l ibrary

DC Static Analysis Example 1. Start OrCAD Lite as shown below: Note that the only program you need to start is “Capture Lite Edition.” The other programs will run automatically as they’re needed. 2. Click the “Create Document” button on the toolbar. 3. The following dialog will appear. Fill in …

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Introduction to OrCAD PSPICE

Introduction to OrCAD PSPICE

Introduction to OrCAD PSPICE PSPICE Rules: 1. All circuits must have a reference node. In PSPICE, this node is usually marked with the number “0.”  Note: The conventional OrCAD ground symbol is not appropriate for PSPICE simulation. 2. All component leads must be connected. Unconnected wires and leads will cause …

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A Guided Tour of the ISIS Editor

Auto hide the Object Selector Device mode Icon

A Guided Tour of the ISIS Editor   We shall assume at this point that you have installed the package, and that the current directory is some convenient work area on your hard disk. To start the ISIS program, click on the Start button and select Programs, Proteus 7 Professional …

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Proteus-7.8 Overview

A Guided Tour of the ISIS Editor

Proteus-7.8 Overview The aim of this tutorial is to take you through the process of entering a circuit of modest complexity in order to familiarise you with the techniques required to drive ISIS. The tutorial starts with the easiest topics such as placing and wiring up components, and then moves …

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Insulated-gate bipolar transistor (IGBT)

Cross section of a typical IGBT cell. The illustration is not to scale.

Insulated-gate bipolar transistor (IGBT)   The insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast switching. It switches electric power in many modern appliances:variable-frequency drives (VFDs), electric cars, trains, variable speed refrigerators, lamp ballasts, air-conditioners and even …

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Phase in Ac Circuit

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Phase in Ac Circuit   When capacitors or inductors are involved in an AC circuit, the current and voltage do not peak at the same time. The fraction of a period difference between the peaks expressed in degrees is said to be the phase difference. The phase difference is <= 90 degrees. It is …

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The decibel (dB)

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The decibel (dB)   The decibel (dB) is a logarithmic unit used to express the ratio between two values of a physical quantity, often power orintensity. One of these quantities is often a reference value, and in this case the decibel can be used to express the absolute level of the physical quantity, as in the …

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