The first entry is a tutorial dedicated to ngspice newbies. You should now have a window that looks like this: If you are a novice user of SPICE, your first attempts at creating a good netlist will be fraught with small errors of syntax. 6.3 NPN Transistors: 1N2222A and 2N696 to the negative terminal through the source, as in the above example. Here is a sample of that same output, redirected to a text file (spice < example.cir > example.txt), then trimmed down judiciously with a text editor for final presentation and printed: One of the very nice things about SPICE is that both input and output formats are plain-text, which is the most universal and easy-to-edit electronic format around. PSPICE Schematic Student 9.1 Tutorial --X. Xiong This tutorial will guide you through the creation and analysis of a simple MOSFET circuit in PSPICE Schematic. One of the more useful concepts in PSpice is the use of subcircuits to group elements into clusters in order to replicate the clusters without having to re-enter all the elements each time. Joined: 2016-05-24 03:10 . Feel free to “copy” and “paste” any of the netlists to your own SPICE source file for analysis and/or modification. The easiest Solution: a simple ideal Transformer 35 6.2.2. In First tutorial, you will learn how to download and install this simulation and circuit design software with step by step guide. which is a damped sinusoidal voltage source: Vname = VO + VA exp[-THETA. most important ones: All analyses can be done at different temperatures. It then lists the input parameters (the lines of the source file), followed by a display of DC voltage readings from each node (reference number) to ground (always reference number 0). Being that the direct SPICE output is plain ASCII text, such a file will be universally interpretable on any computer whether SPICE is installed on it or not. HSpice Tutorial #6 A Differential Amplifier. HOW TO SPECIFY CIRCUIT TOPOLOGY AND ANALYSIS? If there are still errors in the output of SPICE, re-edit the netlist again with the text editing program. Each element in the circuit (vdd, R1, and R2) is identified by node numbers and a value. This is especially important for big circuits consisting of many small sub-circuits from different files. 3. Find a good overview of PSIM, DSIM, and SmartCtrl tutorial videos in one spot. is 300K. As in general programming, the source file you create for SPICE must follow certain conventions of programming. When this command is typed in, SPICE will read the contents of the example.cir file, analyze the circuit specified by that file, and send a text report to the computer terminal’s standard output (usually the screen, where you can see it scroll by). Important: creating SPICE Model and Symbol for a Transformer 35 6.2.1. It is a computer language in itself, albeit a simple one. Creation of the SPICE Model for a real Two Windings Transformer 35 6.2.3. Log in or register to post comments #2 Mon, 2018-06-04 07:47. or books listed at the end of How can I turn the PSpice code (as a *.cir file) into the schematic capture? If the results contain errors, start up the text editing program again and modify the netlist. Then A Brief SPice (Pspice) Tutorial Clayton R. Paul, Mercer University, Macon, GA (USA), paul_cr@mercer.edu Spice Opus Command Window opens with prompt as shown in Figure 1. Netlists are created by a person like yourself typing instructions line-by-line using a word processor or text editor. This tutorial provides a basic introduction to the use of netlists in pspice for students in the Electrical and Computer Engineering Department at Cal Poly Pomona. You can nest the DC sweep command which is often used to plot transistor Click the windows icon at … This tutorial introduces the dependent source elements in PSPICE. Save this file into a folder called “Tutorial”. Run SPICE again and observe the new results. It is recommended by this author that you use this technique of “redirection” to a text file only after you’ve proven your example circuit netlist to work well, so that you don’t waste time invoking a text editor just to see the output during the stages of “debugging.” Once you have a SPICE output stored in a .txt file, you can use a text editor or (better yet!) Here are themost important ones: 1. Practically any computer will be able to edit and display this format, even if the SPICE program itself is not resident on that computer. .MODEL SMOD VSWITCH(RON = 10, VON = 0, ROFF = 100MEG). Name it rccircuit.sp. In this tutorial I will help you to simulate a circuit in which a rectifier is designed. MODELS of Selected Devices and Components, 6.1 Macromodel for the 741 p. 1 Quick SPICE Introduction •SPICE = Simulation Program with Integrated Circuit Emphasis •Netlist = text-based description of circuit • netlist does not use symbols or graphical elements • makes it simple to learn • but hard to visualize usually need a companion schematic Note: SPICE and Pspice make no distinction between lower case and upper case letters. EE105 SPICE Tutorial Example 1 - Simple RC Circuit vs vs gnd PWL(0s 0V 5ms 0V 5.001ms 5V 10ms 5V) r1 vs vo 1k c1 vo gnd 1uF.tran 0.01ms 10ms.option post=2.end Figure 1: A simple RC circuit netlist 3. Feel free to “copy” and “paste” any of the netlists to your own SPICE source file for analysis and/or modification. PSPICE tutorial: a simple DC circuit We will learn some of the basic maneuvers of using the Cadence schematic capture program and PSPice engine through a simple example -- a diode rectifier circuit. the SPICE code is written below the circuit. ModName is the name of the transistor model. You will type in the SPICE netlist inside the simulator program in a … list of parameters. Non-linear transient analysis: calculates the voltage and current as a Fourier analysis: calculates and plots the frequency spectrum. Spice always assigns a positive reference mark to the 1st node and uses SPICE only understands netlists: Each line of the source file shown above is explained here: Electrically common points (or “nodes”) in a SPICE circuit description share common numbers, much in the same way that wires connecting common points in a large circuit typically share common wire labels. Last seen: 2 years 7 months ago . This option corresponds to the last step in the development cycle listed earlier. B.1 SPICEDeviceModels B-5 Table B.1 Parameters of the SPICE Diode Model (Partial Listing) SPICE Parameter Book Symbol Description Units IS I S Saturation current A N n Emission coefficient RS R S Ohmic resistance VJ V 0 Built-in potential V CJ0 C j0 Zero-bias depletion (junction) capacitance F M m Grading coefficient TT τ T Transit time s BV V ZK Breakdown voltage V IBV I ZK Reverse current at V this tutorial, we will use the VPULSE and IPULSE sources. The tutorial explains basic concepts associated with utilizing the Automatic Integrated Circuit Modeling Spice (AIM-Spice) for circuit simulations. Defining a subcircuit A subcircuit is defined by a .SUBCKT control statement, followed by the circuit a) Copy the following SPICE code and save it as a .sp file. between the sinusoid and cosine. The SPICE statements to define the above coupled coils are as follows. are as follows: The MOS transistor name (Mname) has to start with a M; ND, NG, NS and For more videos check out our YouTube Channel. Administrator). Whether you’re a student or professional, SPICE will allow you to predict the behavior of your electronic circuits accurately. function of time when a large signal is applied. You can specify a comment at any time using The first entry is a tutorial dedicated to ngspice newbies. Second, from the LT3748 product page, download the LT3748 Demo Circuit – Automotive Isolated Flyback Controller.. Third, Run LTSpice and open the LT3748_TA02.asc file. Sinusoidal sources will be used in a subsequent tutorial. Once the netlist is composed and saved to a file, the user then processes that file with one of the command-line statements shown earlier (spice < example.cir), and will receive this text output on their computer’s screen: SPICE begins by printing the time, date, and version used at the top of the output. PSICE : It is used for personal computers. Berkeley. Line 1 is a comment, as always. versions of PSpice allow you to ask for a current through a resistor without The circuit diagram below is what you will build in PSPICE. 6.2. Advanced SPICE Tutorial -- Simulating an NMOS Transistor. There are two types of versions exit for it. SPICE simulation is here! LTspice Tutorial: Part 3. First, download the LTSpice application. The easiest Solution: a simple ideal Transformer 35 6.2.2. Both full wave (bridge) rectifier and half wave rectifiers are designed with the help of PSPICE in this tutorial. where one enters the program code using an ASCII text edi-tor (supplied with Pspice). This LTspice Tutorial will explain how to use LTspice ®, the free circuit simulation package from Linear Technology Corporation (LTC) (www.linear.com).LTspice is node unlimited, incredibly easy to learn and can be used to simulate most of the analogue components from Linear Technology as well as discrete and passive components. In fact, it explains the features of different model versions both in terms of static and dynamic characteristics respectively. The circuit can contain the following components: T(= 1E12 or 10+12); G(= E9); MEG(= E6); K(= E3); M(= E-3); SPICE Simulation Program with Integrated Circuit Emphasis • Originally developed at EE Berkeley • Uses mathematical models to describe circuit elements • SPICE3 is the latest variant. Having programmed in BASIC and C/C++, and having some experience reading PASCAL and FORTRAN programs, it is my opinion that the language of SPICE is much simpler than any of these. an operational amplifier) and to insert this description into the overall circuit (as you would do for any other element). Pspice is a version of the original Simulation program with integrated circuit Emphasis program that have been adapted for PC. In order for a computer to be able to understand the SPICE instructions you type, it must have the SPICE program (interpreter) installed: SPICE source files are commonly referred to as “netlists,” although they are sometimes known as “decks” with each line in the file being called a “card.” Cute, don’t you think? The format is as follows: An example of an inverting opamp circuit using the subcircuit For more information, please refer to the SPICE user's manual This is a guide designed to support user choosing the best model for his goals. The following circuits are pre-tested netlists for SPICE 2g6, complete with short descriptions when necessary. later on. The netlist file format required by SPICE is quite simple. Ngspice Tutorials. the opamp. There is a cycle of steps to be followed in using SPICE to analyze a circuit. Non-linear DC analysis: calculates the DC transfer curve. and also the unknown, the ratio of output variable to input variable (gain or tranfer gain), the resistance with respect to the input source, the resistance with respect to the output terminals. Non-linear DC analysis: calculates the DC transfer curve. Then, of course, you can print the output to paper if you so desire. L and W is the length and width of the gate (in m). Save the PSIM circuit with a new name “Buck ‐ MOSFET SI4628DY (SPICE MOD).psimsch”. As an early public domain software program with source code available, SPICE … .DC Sweep), 5.2 HSpice example (.TF analysis and .DC Sweep), 5.3 Mutual Inductor (Transformer;Transient As an early public domain software program with source code available, SPICE … We defined a subcircuit for Notice: The first line in the .sp file must be a comment line or be left blank. Note: To ensure the filename has For a final presentation, it might be nice to trim all the unnecessary text and leave only what matters. Non-linear transient analysis: calculates the voltage and current as afunction of time when a large signal is applied. 3rd Tutorial on PSpice Simple Subcircuits in PSpice. 2N5459 N-JFET see section on Models of Selected Devices and Components As a result, some familiarity is assumed. Some This tutorial will focus on the usage of input files for netlists. U(= E-6); N(= E-9); P(= E-12), and F(= E-15). It is worthwhile to take a look at some simple simulation using hspice. First developed at UC Berkeley, it is the origin of most modern simulators. Simple Tutorial. model for 741), 5.1 Thevenin Equiv. Creation of the Symbol for a Two Windings Transformer 35 6.3. Some students may have experience using only the schematic capture version of … These SPICE doesn’t care what you name it, so long as it has a name compatible with the filesystem of your computer (for old MS-DOS machines, for example, the filename must be no more than 8 characters in length, with a 3 character extension, and no spaces or other non-alphanumerical characters). 4. C:\PSIM_SPICE Tutorial\SPICE Models. If the user desires, he or she is free to use the advanced capabilities of word processing programs to make the output look fancier. Short Tutorial on PSpice. We will need to use “probes” to specify the voltages or currents that will show as traces on the plot. The ngspice manual does not contain introductory chapters, but finally will give you details on all the features offered by ngspice. The file extension “.cir” is not mandatory; I have seen “.inp” (for “input”) and just plain “.txt” work well, too. Some students may have experience using only the schematic capture version of … Spice is a program developed by the EE Department at the University of California at Berkeley for computer simulation of analog circuits. The following circuits are pre-tested netlists for SPICE 2g6, complete with short descriptions when necessary. (t - TD)] sin[2pi.f (t - TD) + (Phase/360)]. a word processor to edit the output, deleting any unnecessary banners and messages, even specifying alternative fonts to highlight the headings and/or data for a more polished appearance. This LTspice Tutorial digs deeper into circuit analysis with LTspice ®. In its original form you tell Spice what elements are in the circuit (resistors, capacitors, etc. NGSPICE is an open source mixed-signal circuit simulator. PSpice has many excellent models of transistors, thyristors and other devices that … (See Chapter 2’s Computer Simulation of Electric Circuits for more information on netlists in SPICE.). Spice model tutorial for Power MOSFETs Introduction This document describes ST’s Spice model versions available for Power MOSFETs. SPICE can do several types of circuit analyses. NB are the node numbers of the Drain, Gate, Source and Bulk terminals, Now, Spice Opusis ready to execute commands. In the analysis we will find the ID current … ModName is the name of the transistor model (see further). of the the uA741 (see operational The default temperature Here are the There is also limited discussion about making SPK and CK kernels. Once you’ve “debugged” your netlist and are getting good results, run SPICE again, only this time redirecting the output to a new file instead of just observing it on the computer screen. analysis). Create one now. Whether you’re a student or professional, SPICE will allow you to predict the behavior of your electronic circuits accurately. First developed at UC Berkeley, it is the origin of most modern simulators. The tutorial starts under the assumption that the demo version of … using a voltage source (EX: I(R1) gives the current in the resistor R1). Please bear in mind that the circuit diagram exists only to make the simulation easier for human beings to understand. 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. NGSPICE is an open source mixed-signal circuit simulator. 220-spice-notes.tex Page 6 Powers of Ten The following abbreviations for powers of ten are recognized by spice. This is a simple data file with 8 values: 4 for each of 2 patients give a measurement of IL2 and gIFN defined subsets (4 each, all available combinations of IL2 +/-and gIFN +/-).. -r rcrcac.out) or without. (See Chapter 2’s Computer Simulation of Electric Circuits for more information on netlists in SPICE.). This tutorial will guide you through the windows version of the hspice. 6.5 JFET model: 2N5459. 6.2. ND, NG, and NS are the node numbers of the Drain, Gate, and Source terminals, Both upper and lower case letters are allowed in PSpice and Hspice (SPICE Both full wave (bridge) rectifier and half wave rectifiers are designed with the help of PSPICE in this tutorial. 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Further clarity to the reader NG, and then enter the circuit ( vdd R1! Most important ones: all analyses can be done at different temperatures 1st node and uses the sign. The length and width of the SPICE user 's manual or books listed at the University of California Berkeley...

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