Pspice is a simulation program that models the behavior. Simulation of a circuit in pspice to find the voltage, current, and power at any point and component in a schematic. In this tutorial, we will examine mosfets using a simple dc circuit and a cmos inverter with dc sweep analysis this tutorial is written with the assumption that you know how to do all of the basic things in pspice. Dc sweep analysis transient analysis ac sweep analysis. End statement so that spice knows when it has read the whole file. Understand how to use pspice for basic circuit analysis. Pspice tutorial pspice is a software tool for spice simulation. You should now see values on your circuit representing current andor voltage. Pspice commands on page 23, but also to the device declarations and interactive numeric entries described in subsequent chapters. A slightly longer introduction to pspice imperial college london. Organized into 22 chapters, each with exercises at the end, it explains how to start capture and set up the project type and libraries. Browse the free library of bjts, jfets, mosfets, igbts, scrs, discretes, operational amplifiers, optocouplers, regulators, and pwm controllers from various ic vendors.
Another problem is that when performing bias point analysis, i cant see cgs. 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. Cadence pspice offers more than 33,000 parameterized models covering various types of devices from major manufacturers. Pspice has a feature which allows you to automatically change a part value within a specified range and to simulate and graph the results. Analog simulation with pspice integrity solutions edais. To set up a pspice simulation, click on pspice and then select new simulation profile. Bias point analysis determines the equilibrium quiescent point voltages and currents for the circuit. In most cases, the results of the dc operating point analysis are intermediate values for further. Ppt introduction to pspice powerpoint presentation. Create another new pspice simulation profile but this time the bias point simulation settings will be inherited from the previous bias1 point simulation profile. If i create a new project, make a schematic, and do a bias point. Dc bias point analysis pspice for ti tutorial videos. Design and simulate a basic dc circuit using pspice duration.
Run the simulation and display the dc voltages on the circuit by clicking on the. Pspice student is sometimes distributed under different names, such as pspice student thinstalled. Pspice tutorial wilfrid laurier university physics labs. November, 2008 analog simulation with pspice version 16. Home cadence videos dc bias point analysis pspice for ti tutorial videos. Spice tutorial purdue engineering purdue university. In addition to displaying voltages, current and power values found in the bias point analysis can also be displayed.
Browse the free library of bjts, jfets, mosfets, igbts, scrs, discretes, operational amplifiers, optocouplers. The result of this analysis is generally referred as the bias point or quiescent point, q point. The program first computes the dc operating point of the circuit and determines linear. Learn the basics of circuit simulation using cadence design systems powerful simulation software. You run dc bias simulations, transient analysis simulations, and sweep simulations, allowing you to sweep component values, operating frequencies, or global parameters. Analog design and simulation using orcad capture and pspice provides stepbystep instructions on how to use the cadenceorcad family of electronic design automation software for analog design and simulation. Pspice ad reference guide montana state university. In this case we want to perform a dc analysis also known as the operating point and so we must add the. In pspice, the bias point analysis calculates the node voltages and currents through the devices in the circuit. In its original form you tell spice what elements are in the circuit resistors, capacitors, etc. To set up and run a dc sweep analysis in the analysis setup dialog box, click the dc sweep button. And unlike every others student in my circuit theory, i didnt take ee100, which offer for freshman student.
It was the first time i heard and work with the pspice software. The tutorial starts under the assumption that the demo version of pspice is installed on your computer. This nominal value is required, but it is only used if the dc bias point detail is computed. The analog simulation with pspice course starts with the basics of entering a design for simulation and builds a solid foundation in the overall use of the software. Similar to bias point, expect that the value of one dc source in the circuit can be. The program uses all dc sources and neglects all reactive components which are effectiv for ac only capacitors and inductors.
As mentioned at the beginning of this tutorial, we will be covering the following circuit analysis options. Dc bias point analysis lesson objectives after you complete this lesson you will be able to. In addition, bias point analysis is used as the starting point for smallsignal ac analysis. The most commonly used option in this dialog is the. Chapter 2 dc bias point analysis abstract when you connect a battery or a power supply to a circuit, the circuit voltages and currents effectively settle down to what is selection from analog design and simulation using orcad capture and pspice, 2nd edition book.
As an example, start from the voltage divider circuit shown below. Create a bias point simulation profile based upon the initial bias point. The operating point of a device, also known as bias point, quiescent point, or qpoint, is the steadystate dc voltage or current at a specified terminal of an active. Oct 16, 2016 the ac signal applied to them is superposed on this dc bias current or voltage. Analog design and simulation using orcad capture and pspice, second edition provides stepbystep instructions on how to use the cadenceorcad family of electronic design automation software for analog design. The ac signal applied to them is superposed on this dc bias current or voltage. Chapter 3 dc analysis abstract the dc analysis calculates the circuits bias point over a range of values when sweeping a voltage or current source, temperature, a global parameter, or selection from analog design and simulation using orcad capture and pspice, 2nd edition book. Introduction to pspice objectives a primary purpose of this lab is for you to become familiar with the use of pspice and to learn to use it to assist you in the analysis of circuits. The bias point simulation calculates the dc bias point based on dc source values and any initial conditions set on the circuit. Start the orcad schematic capture program start programs orcad 15.
Click on the pull down inherit from menu as shown in fig. To set up your simulation this must be done to run one, choose new simulation profile from the pspice menu. The dc bias point analysis is run prior to the ac analysis, and is used to effectively linearize the circuit around the dc bias point. This corresponds to using the dc multimeter to probe each voltage and current. For example, if we ask pspice its calculations for vmn and i and it said, 4. Cadence is a leading provider of system design tools, software, ip, and services. Configuring a dc operating point analysis in multisim. Create a simulation profile for dc bias analysis netlist the design for simulation run a dc bias point analysis view the results in the output file. Monte carlo, save bias point and load bias point options grayed out for dc sweepalso i cant see cgs and cgd during bias point simulation, only cgsov and cgdov. In bias point analysis, all of the ac sources are turned off voltage sources shorted, current sources opened and only the dc sources are active.
Analog design and simulation using orcad capture and pspice, second edition provides stepbystep instructions on how to use the cadenceorcad family of electronic design automation software for analog design and simulation. Robinson never explained in detail how to create and run a circuit in pspice. This is your basic direct current voltage source that simulates a simple battery and allows you to specify the voltage value. Pspice is a generalpurpose circuit simulator capable of performing four main types of analysis. In the same window, create a new design without a template named. The simulation program with integrated circuit emphasis spice became an industry standard for circuit simulation. Mar 27, 2012 dc operating point analysis calculates the behavior of a circuit when a dc voltage or current is applied to it. Analog design and simulation using orcad capture and pspice. Pspice then iterates changing the node voltage specified until the circuit converges dc bias point found. For example, for a simple common emitter transistor amplifier, the bias point analysis will calculate the base, emitter, and collector bias voltages and the base, collector, and emitter quiescent currents. Go back to theschematic diagram from the right hand fast access keys, choose net alias. In order to run pspice software at colorado state university csu, you must setup the pspice software into your own account u drive. We will look at how to perform the following analyses. We will also learn how to set up a parametric secondary analysis as part of one of the four main analyses types.
Oct 27, 2012 simulation of a circuit in pspice to find the voltage, current, and power at any point and component in a schematic. The software is already installed in the computer of every station. Pspice is positive, then pspice will return a positive number. Notes for orcad pspice university of california, san diego. Build electrical circuit drawings in professional industry standard software, orcad capture fundamentals, pspice fundamentals.
On the simulation toolbar, click the enable bias current and bias voltage display button. Bias point dc analysis where you place voltages, currents, and power on the schematic dc sweep vary a source or component ac sweep. Simulate electrical and electronic circuits using the power of pspice software. In the new simulation window, enter bias2 for the name. Bias point the bias point analysis is the starting point for all analysis. Then save the design by clicking on the save current design icon shown here so that it is written into the ads database. Confirm that the power values displayed are correct.
In pspice as with other spice simulation software tools, there must be a 0 v node in the circuit otherwise nodes will be reported as floating in the output file. Pspice is the most prominent commercial version of spice, initially developed by microsim 1984, but now owned by cadence design. The operating point of a device, also known as bias point, quiescent point, or q point, is the steadystate dc voltage or current at a specified terminal of an active device a transistor or vacuum tube with no input signal applied. Orcad bias point analysis for bridge circuit pspice. Simulate circuit designs, be more equipped for your job, complete circuits 1 and circuits 2 assignments and gain respect from your engineering peers. Verify your hand calculations and homework in circuits 1 and circuits 2 class. Orcad pspice ad how to use this online manual how to print this online manual welcome to orcad overview commands analog devices digital devices customizing device equations. If the current value returned by pspice is positive, then current flows in at node m and out of node n. The completed spice input file for performing a dc bias point simulation on this circuit therefore looks like this. For instance, resistor values, currents, or voltages can be swept. In this tutorial, we will examine mosfets using a simple dc circuit and a cmos inverter with dc sweep analysis. Because it is a bridge circuit but some of the resistors has no voltage reading on it,using bias point analysis. Bias point, dc sweep, ac sweepnoise, and time domain transient.
Another excellent feature of the dc sweep in pspice. Spice is a program developed by the ee department at the university of california at berkeley for computer simulation of analog circuits. This calculates the dc values for all the node voltages and branch currents in the circuit. Monte carlo, save bias point and load bias point options grayed out for dc sweep also i cant see cgs and cgd during bias point simulation, only cgsov and cgdov. The bias point simulation applies any dc sources and allows. Basic steps in creating and analyzing a circuit using pspice. Nodeset is often used to speed up the time of convergence for the dc bias point solution. Introduction to pspice introduction to pspice simulation software the origins of spice in the 1960 s, simulation software begins cancer.
We will learn some of the basic maneuvers of using the cadence schematic capture program and pspice engine through a simple example a diode recti. Orcad tutorial simulating the circuit parallel systems. This presentation will only focus on bias point analysis. There are examples of all four types of standard simulation and a selection of different plots. Pspice applies the default units for the numbers describing the.
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