Independent and dependent voltage and current sources. Note the default settings for dc sweep simulation are voltage source as the swept variable type and linear as the sweep type. For this example v1 is swept linearly from 0v to 20v in 1v increments. And pspice is a product of the orcad corporation and the student version we are using is.
Pspice ad digital simulation condition messages 61. In this video well explore the power of the behavioural voltage source and see what mathemat. Sometimes one would like to figure out voltage, current, or power for a given circuit. The sweep variable in this example the voltage source v1. From the qd dynamic model of the electrical and mechanical modes, pspice equivalent circuits are designed and implemented for each harmonic voltage component. For instance, suppose we wanted to make the voltage source above model. All you need is a controlling voltage to multiply the resistor value. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. The vpulse source has 7 parameters affecting the waveform.
Pspice voltage and current sources watch more videos at lecture by. The device features a typical line regulation of 0. Since we want to plot the voltage and current versus time, the transient analysis is used. Pspice is a circuit analysis program, developed by microsim corporation, based on the well known spice program simulation program for integrated circuit evaluation developed at the university of californiaberkeley. In principle you can download the demo version from. In the previous section we used the variable voltage supply, v1, to plot the characteristics of a. Simulation of variable frequency induction motor drive. The basic low frequency diode currentvoltage relationship is given by. Pspice will change the voltage source v1 from 1 to 10 in linear increment of 1. For the sweep variable, select global parameter and enter the parameter name. Dc sweep in pspice, is the ability to do a nested sweep. This video will help you learn some of the undiscovered talents of the ltspice voltage source. The arbitrary sources in ltspice are incredibly versatile and useful.
Download pspice student by cadence design systems, inc. In the previous article it was shown how the bi source could be used to make a simple current dependent current source bv could similarly be used to make a current dependent voltage source. In words this command tells ltspice that there is a variable named r that has an initial value of. V1 first voltage v2 second voltage td initial delay tr absolute rise time tf absolute fall time pw pulse width per period to simulate a step response, we use a vpulse source set to v10v, v21v, td0, tr1ps, tf1ps, pw1s, and. Create a new pspice project or use the resistor project from chapter 1 as a starting point. In addition, pspice has analog and digital libraries of standard components such as nand. Sep 30, 2012 couldnt find a ltspice model for ina128 instrumentation amp but did find a pspice model. One expression for v ce that pspice will understand is watch punctuation marks. The following figure shows the selection of a dc voltage source or battery. Notes for orcad pspice university of california, san diego.
If we need a graphical output, pspice can transfer its data to the probe program for graphing purposes. Pulse,exp, or sin is specified for transient analysis. The sweep type is set to linear, starting from 0 to 10 v in steps of 1 v. Similar to bias point, expect that the value of one dc source in the circuit can be varied over some range, and the currents and voltages in the circuit are calculated at each dc source value.
The pspice version available at the university of mississippi can be used on a personal computer for sophisticated analysis of electric circuits of. Linear this is so you can sweep through a range of values 6 fill in the start, end, and increment values. For a dc sweep analysis, select pspice new simulation profile and select dc sweep for the analysis type. To simulation your design, you need to provide pspice with the following information. This allows you to make a plot of a voltage or current in the circuit as a function of the dc source voltage.
If you arent sure where to put it, place it near the bottom of the drawing. The supply voltage is 2 v, and the current limiting resistor r 1 1kw. Nearly all circuits that you simulate need a voltage source of some kind. If you doubleclick the e1 dependent voltage source in pspice, you may. This tutorial introduces the dependent source elements in pspice. Every pspice project needs a pspice ground to establish a reference potential. All schematics you draw on pspice will need the following. The dc sweep analysis varies a voltage source over a range of voltages.
So far we have covered circuits with resistors and independent sources. The source vac is a 440 hz source with a peak amplitude of 10 volts. Voltage and current sources are in the sources library. These include the independent dc and ac voltage and current sources, and the simple voltage or current controlled dependent voltage and current sources. Most elementary math functions are allowed and you can use node voltages and terminal currents in. A voltage pulse or pulse train can be applied as an independent source in pspice using vexp. Use pspice and ac analysis for a single point 60 hz to obtain the node voltages v1 and v2, and current in r3. It is likely that the old url for this pspice tutorial will disappear on august 31, 2015. The current source i3 has a value of 12ma and flows from node 3 to node 5.
It requires only two external resistors to set the output voltage. Set the start, end and increment values in the sweep type box to be 0, 10, and 0. Vsffm frequency modulated sinusoidal voltage source. Xiong this tutorial will guide you through the creation and analysis of a simple mosfet circuit in pspice schematic. In pspice, this can be done using the etable component in the 2015 oxford university press reprinting or distribution, electronically or otherwise, without the express written consent of oxford university press is prohibited. Oct 24, 2008 a source can be assigned either a dc value or a transient value. Dec 22, 2010 create a pspice voltage source that references a file as its source, learn how to make it repeat and then use the results from pspice to make a more complex input waveform. Set the sweep variable to voltage and sweep type to linear. Run pspice voltage level marker enable bias voltage display enable bias currnet. Pspice ad reference guide includes pspice ad, pspice ad basics, and pspice product version 10. Use this source to create a pulse voltage waveform with an exponential rising andor falling edge. Pspice ad reference guide montana state university. A voltage source may be used as an ammeter in p spice by inserting a zerovalued voltage source in to the circuit for the purpose of measuring. In sweep type, choose linear, start value 1, end value 10, increment 1.
If you have multiple supply rails, and you need to, you could switch the voltage source via a switch enabled from the supply rail of interest. To make it a 1hz squarewave, the period t 1frequency 1 second. Electrical and computer engineering outline introduction. The name is the reference designator for the voltage source which in this case is v1. The b source is a type of nonlinear controlled source that was added to open the door to pretty much any function you might want, covering pretty much all possible cases. To set the squarewave source, rightclick the body of the voltage source, leave both textboxes blank and choose the advanced button.
The dc sweep analysis varies a voltage source over a range of voltages in an assigned number of. Vpulse pulse voltage source model online documentation for. Place a v dc source from the source library and set its value to 10v. Frequency modulated sinusoidal voltage source model. An iprobe is inserted in the circuit to display the current and a viewpoint is used. I know to use the vpulse source but it has only two voltages as parameters but i need 3. In the analysis we will find the id current and the vds voltage. The vexp voltage source generates a waveform as shown in figure 5, where tc1 and tc2 are the time constants of the rising and falling exponentials, respectively.
To simulate click on the run pspice icon at the top of the schematic. Starting with spice3, they allowed a v for voltage or an i for current. Download pspice for free and get all the cadence pspice models. In the previous section we used the variable voltage supply, v1, to plot. Try free download manager fdm visit the home page at. Pspice voltage and current sources watch more videos at videotutorialsindex. Pspiceltspice compatability electronics forum circuits. Vsin sinusoidal voltage source model online documentation. Pspice voltagedependent, voltage source eeweb community. Pspice simulation profile an overview sciencedirect topics. In sweep variable, choose voltage source set name to v1 the name of the voltage source in your schematic. This time, replace the dc voltage source with a time varying voltage source.
Pspice reads them in but does not execute the line. This tool was originally designed by cadence design systems. A quick guide for pspice university of mississippi. Vsin sinusoidal voltage source model online documentation for. Open the pspice design manager on your pc by typing design manager in the search bar. Can ltspice work accurately with pspice models, or does it just ignore any bits it doesnt understand which would result in inaccurate modelling, but maybe not let the user know that. Place a resistor r from the analog library and name it rs and set its value to 47k. Here we will be using the circuit 1 as a reference. Pspice student is sometimes distributed under different names, such as pspice student thinstalled. Temp temperature a10 sources transient source descriptions a24 line comment lines that start with a are comment lines. The lm317 device is an adjustable threeterminal positive voltage regulator capable of supplying more than 1. The minus sign is required because pspice measures voltage source currents as flowing from the positive node to the negative.
Close the library selection window and we will begin the construction of the following circuit. Ltspice dependent voltage sources circuit electrical. In this example the dependent voltage source is called esource and the positive terminal of the source is net 3. In ltspice, the humble voltage source rarely gets to demonstrate its true capabilities. Creating dependent sources in pspice all about circuits. Pspice schematic probes are placed in the circuit to measure the voltage across the resistor and the current through the inductor. Download a free trial to find out which altium software best suits your needs. Click on pspice and select run to run the dc sweep analysis. The simulationready sinusoidal voltage source component vsin can be found in the simulation sources integrated library \library\simulation\simulation sources.
The pspice ground has symbol, which is different from ordinary ground with symbol. A simple addition to the above resistor model gives you a voltage controlled resistor. Exampletf v1,2 vin finds smallsignal voltage gain between nodes 1 and 2 as the output variable. Up to now, these tutorials have discussed only the most basic types of sources. Pspice simulates the circuit, and calculates its electrical characteristics. The circuit diagram below is what you will build in pspice. That would account for usecase of the references supply being off while the other supply rails are still on. I am trying to make a circuit that uses a voltage controlled voltage source i believe, but the image that pspice wants me to use is not what i have written down on the drawn one. The common filenames for the programs installer are pspice.
In this tutorial this law is applied and verified using pspice as you will see shortly. The next thing that you have to do is get some or all of the parts you need. Spice tutorial purdue engineering purdue university. Also pspice is a simulation program that models the behavior of a circuit. Use the dbreakz device from the breakout library for the two diodes the source is a vsin with amplitude of 20 v and frequency of 100 hz.
To change the background color of the schematic, go to the toolbar and click. Pspice tutorial 3 using pspice for circuits with dependent sources the problems in this tutorial and the corresponding homework continue to deal with the dc analysis of circuits, or dc bias analysis in pspice. The program lies within education tools, more precisely science tools. Specify the voltage source that you wish to sweep v2 or the one connected to vin specify the start and stop voltages as well as the voltage increment. Consider the frequency modulated sinusoidal voltage source in the above image, with the following characteristics. Use pspice and ac analysis for a single point 60 hz to obtain the. Consider the sinusoidal voltage source in the above image, with the following characteristics. Browse cadence pspice model library cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. The gain can be either a positive or negative gain. Feb 07, 2018 pspice voltage and current sources watch more videos at lecture by. Pspice student kostenlos windowsversion herunterladen. The time variable takes the time of the present simulation step in seconds. In order to get a histogram for the other variable, doubleclick the variable name and select or type in the new one. Transforming the voltage source to the current source and writing the node voltage equation results in.
The image below shows an example waveform produced by an exponential voltage source connected to a 1ohm load with the parameters set to their default values. The sweep variable should be a voltage source and we have. Tf iv1 vs finds the smallsignal transconductance using the current through the source v1 as the output variable and vs as the input variable. Subckt subcircuit definition a9 x subcircuit call a24. Click on a component to see amount of current flowing through it at a given point in time. Sens sensitivity analysis a9 w current controlled switch a23. A quick guide to using pspice 9 florida institute of. As with other analysis types, a pspice simulation profile needs to be created.
Pspice voltage source from file part 1 of 2 youtube. For the purpose of this tutorial we will only need the analog and the source library. The sweep variable name should be v1 or whatever name you have for your dc voltage source. An annoying problem in pspice is the inability to change some properties of the part.
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