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The following deck computes the output characteristics of a MOSFET device over the range 0-10V for VDS and 0-5V for VGS. 2. MAILING LISTS: ----- There are two mailing lists dedicated to the use and development of ngspice. Heute tragen eine kleine Gruppe von Maintainern und Nutzern zum ngspice-Projekt bei, indem sie neue Features, Erweiterungen und Bug-Fixes zur Verfügung stellen. Continuing the example,.MODEL my-npn npn ( BF = 175 IS=1e-17 VA=75 BR=2 ) where BFis the forward β, ISis the saturation current, VAis the Early voltage, and BRis the reverse β. The 50K ohm feedback and 2K ohm input resistors mean our signal will be amplified 25 times. 0, October, 1998. The model card keyword VDMOS specifies a vertical double diffused power MOSFET. This is a guide designed to support user choosing the best model for his goals. Wie kann ich eine Schaltung simulieren, die einen Mosfet enthält, und die Werte im Datenblatt des Mosfets in ngspice umwandeln. 7. U.P. These include most SPICE3f5 models, and industry standard models, such as: VBIC and FBH bipolar transistor models, various BSIM MOSFET models, the PSP MOSFET model and the VDMOS power MOSFET model. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. Announcements. .title Sample MOSFET circuit.options badchr=1 ingold=1 numdgt=4.include 2n7000.inc ;include the subcircuit and model for 2N7000 *model terminals in order are: drain,gate,source *Voltage source at input to MOSFET *transitions from 0v to 5v after 10ms delay, pulse width is 10msec, repeats in 50ms 3 This tutorial is written with the assumption that you know how to do all of the basic things in PSPICE: starting a project, adding parts to a circuit, wiring a circuit together, using probes, and setting up an using a simulation profile.!! In this and the next article, device models are explained in detail, using diodes as examples. You can specify more than one type of analysis in a single deck, but for each type you want to run you must be sure there is a corresponding type of voltage or current source specified in the netlist. The MOSFET starts with an ‘M’, the resistor … 9 year old is breaking the rules, and not understanding consequences, Installing from adb installs app for all users. What we will be able to do depends mostly on user interests, contributions and feedback. This will open the Simulation dialog. What is Qucs-S? Qucs-S is a spin-off of the Qucs cross-platform circuit simulator. A list of selected SPICE parameters and their relation to the parameters discussed in this … How to Write a Netlist; 8. You can access the user manual here. Noise analysis 5. Thanks for contributing an answer to Electrical Engineering Stack Exchange! circuit = Circuit ( 'NMOS Transistor' ) circuit . All functions and callbacks of the interface are assessed. 2 NGSpice Spoken Tutorial - Novice. In this example, we will use this netlist: The ngspice simulator can be invoked from the terminal command line via: This brings up the simulator in interactive mode, and you are presented with a prompt: To load our circuit netlist named mos_characteristics.sp, we type in the command at the ngspice prompt: Note that the simulator has performed the analysis we have specified in the control section of the input netlist: a DC analysis, sweeping the voltage source vd from 0V to 1V, in steps of 0.01V. How to Run these Examples; 7.3. In the “NETLIST Description”, the components are listed with the nodes they are connected to. For example, the equivalent-circuit model in Fig. Xyce is an open source, SPICE-compatible, high-performance analog circuit simulator, capable of solving extremely large circuit problems developed at Sandia National Laboratories. This also means we can easily, virtually, swap out components to see how they perform in our design. This manual describes all commands and procedures available in ngspice and lists numerous examples. Some sims will allow you to paste the whole ascii model text into a special area and this will overwrite the model parameters contained in the device you chose. A depletion type MOSFET has a normally on condition at a zero gate-to-source voltage. Once you have ngspice installed, you can run it interactively, or in batch mode. SUM75N06 datasheet Original SUM75N06 Model . PS. Which consists of V S = 0, V D = 0 and V B = 0 and a bias is applied to the gate terminal. The NGSpice acronym stands for Next Generation Simulation Program With Integrated Circuit Emphasis. * ngspice-users@lists.sourceforge.net: This list is the list for the users of the ngspice simulator. The SPICE model file used has been updated to reflect the correct BSIM version (version 4.5). AC Sweep should already be selected with specific values entered for Start Freq and End Freq. ngspice is an open-source SPICE simulator for electrical circuits. Example: M1 3 2 1 0 NMOS L=1u W=6u.MODEL NFET NMOS (LEVEL=2 L=1u W=1u VTO=-1.44 KP=8.64E-6 + NSUB=1E17 TOX=20n) where M1 is one specific transistor in the circuit, while the transistor model "NFET" uses the built-in model NFET to specify the process and technology related parameters of the MOSFET. Example: .DC Vds 0 5 0.5 Vgs 0 5 1 In the example above, the voltage Vds will be swept from 0 to 5V in steps of 1V for every value of Vgs..AC Statement This statement is used to specify the frequency (AC) analysis. These are not meant to be "productive" programs, but just give some commented example usages of the interface. rev 2021.1.18.38333, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Open the opamp1.sch example from the ngspice example folder. MOSFET drain current equation vs on resistance, The sum of two well-ordered subsets is well-ordered. File: ngspice.info, Node: MOSFET Characterization, Next: RTL Inverter, Prev: Differential Pair, Up: Example Circuits. Das Projekt wurde gestartet an der Universität von Rom von Paolo Nenzi. SPICE Device Models: Principle of Operation of Diodes. include ( spice_library [ 'ptm65nm_nmos' ]) # Define the DC supply voltage value Vdd = 1.1 # Instanciate circuit elements Vgate = circuit . Tweet. A window, showing the value of the transistor drain current (negative of the current into the positive terminal of vd) as the drain voltage is varied, is opened: One advantage of running ngspice in interactive mode is it allows us to run simulations via the ngspice prompt without reloading the circuit. © 2021 Microelectronics and Microprocessors Laboratory. Ngspice is an ongoing project, growing everyday from users contributions, suggestions and reports. Vdss, Idss, Igss, Vgs, Rds, etc. In addition, Verilog-A models may be processed into Xyce … Why did the design of the Boeing 247's cockpit windows change for some models? 8: MOSFET Simulation Example 4.7 (p. 269) Determine i Dn, i Dp, v O for -2.5V < v I = 2.5 by PSPICE simulation. added Xyce Mosfet nfin #177; V1.3.2 2019-03-11. support Ngspice 30 and Xyce 6.10; fixed NgSpice and Xyce support on Windows 10; bug fixes; V1.2.0 2018-06-07. The following deck computes the output characteristics of a MOSFET device over the range 0-10V for VDS and 0-5V for VGS. Therefore an example template MOSFET model is .model XXXX VDMOS(Rg= Rd=5 Rs=1 Vto= Kp= Cgdmax= Cgdmin= Cgs= Cjo= Is= Rb= ) We are now going to construct a MOSFET model for the SUM75N06 and SUM110N04 low ON resistance MOSFETs from Vishay . To this end, we first review the principle of operation of a diode. list Ngspice and L Tspice are freely available without any limitations. The Python Package Index (PyPI) is a repository of software for the Python programming language. To this end, we first review the principle of operation of a diode. How to Learn Python; 7.2. The spice model for the STN2NF10 is found on this page: -. First of all pick a MOSFET from within your sim that is already present and supported. 4. The LT1160 top driver can drive the N-channel power MOSFETs operating off a high voltage rail of up to 60V. This tutorial here gives you some information how to start. Lecture 12-2 BJT Circuit Analysis • SPICE solves the system of nonlinear equations to obtain the voltages and currents • Is this circuit in the active region? Why can't we just enter the characteristics as meantioned in the datasheet: STN2NF10. Advanced Usages. Ok, Thanks for your fast response Andy!. Introduction to Operational Amplifiers. For this demo let us pick a simple inverting op amp circuit. How on earth should I be able to know these? FOR MOSFET CHANNELS Want to ensure accurate L dependance of models – Benchmark: KF parameter 0 i fl 2 f = KF0⋅I D AF C OX L2 f 1 i fl 2 f = KF1⋅I D AF C OX LW f 2 &3 i fl 2 f = KF2⋅g m 2 C OX LW f AF NLEV PSD All bad models for deep sub-micron (No 1/L3 dependance) [Çelik-Butler, 1999] Thank you very much! Also, one should not confuse this line with the .NODESET line. How to set the Ngspice path ? 6.12. This will help us to continuously improve the MSEE (Microelectronics) program. What does children mean in “Familiarity breeds contempt - and children.“? All rights reserved. If a jet engine is bolted to the equator, does the Earth speed up? Why would a regiment of soldiers be armed with giant warhammers instead of more conventional medieval weapons? For a quick introduction to ngspice, you can visit their website, or you can proceed to the download page. used in Linux operating system. For more details on drawing schematics in kicad re… Depending upon the gate bias there are different regions of operation in C-V curve that are accumulation, depletion and strong inversion. Lect. The nmos transistor demonstrated in this example is a low-level device description. PySpice is a free and open source (*) Python module which interface Python to the Ngspice and Xyce circuit simulators.. Ngspice is a fork of the famous SPICE circuit simulator, while Xyce is a SPICE compatible simulator developed by the Sandia National Laboratories. ngspice tips and examples tips, circuit examples and tutorials to run ngspice efficiently. Check our publication list. Abode plot is generated. Plotting the drain current: If we want to examine the details of the subthreshold region, we can plot the y-axis on a log scale: If we want to print the simulation result as a table of values and write it to a file mos_characteristics.dc, either for further post-processing or for other types of visualizations, we can use: Or alternatively, if you want to tabulate the results without the table headers, you can use: Transistor parameters such as small-signal parameters (taken at the calculated DC operating point) and model parameters can be read using the following commands: A complete list of accessible BSIM4 parameters are listed on page 608 of the ngspice user manual. How do I simulate a circuit containing a Mosfet, and transform the values in the datasheet of the mosfet into ngspice. How to set the Xyce path ? MOSFET Characterization. Generalized form for this is as shown. Select the Simulate button at the top of your interface. We can use it to try out some circuit simulations as we go through the semester. Sensitivity analysis 6. 2.1 Contributors; Introduction to NGSpice NGSpice . Tutorial ‐ How To Use SPICE Module 5 3. These are only added to aid the user to compare MOSFETs. LTspice is mainly used in windo ws operating system. So far I've succesfully done a simulation with a simple voltage source, and resistor. MOSFET models! M1 2 1 0 0 NMOS L=1.5u W=3u * The MOSFET. Making statements based on opinion; back them up with references or personal experience. Examples. NG spice is mainly . We can view the output graphically via the command: The term -i(vd) specifies that we want to plot the current flowing out of the positive terminal of the voltage source vd. I've read the part of the ngspice manual (p. 127, sorry not enough reputation to post 2 links: ngspice.sourceforge.net/docs/ngspice-manual.pdf) about mosfets, it says the general form to define a mosfet is as follows: The 'm' parameter is for multiplicity, I understeand this one. When this (Vgs) threshold … I believe there is a good reason why it's the way it is, I'm probably just missing or misunderstanding something. 448 3 3 silver badges 18 18 bronze badges \$\endgroup\$ \$\begingroup\$ Netlist 2 doesn't have a proper analysis statement. AC Sweep should already be selected with specific values entered for Start Freq and End Freq. Description Comments Description. Collection of tools to use with ngspice. Calculations can also be done on the parameters: You can also simulate the effect of varying device parameters by using more complex control constructs like loops: Sourcing this netlist from the ngspice prompt results in: We can use python programming for better graphs, and/or further data analysis and processing, in conjunction with the ngspice batch processing mode. Initial support of the Xyce simulator. In this tutorial, we explore two simple circuits: an NMOS transistor discharging a load capacitance and an NMOS transistor charging a load capacitance. from 2 files. share | improve this question | follow | asked Nov 30 '18 at 7:18. kevin kevin. MOSFET transistor I-V characteristics iD K 2()vGS–Vt vDS vDS 2 = [] – iD vGS vDS--+ + iD Kv()GS–Vt 2 = []()1 + λvDS K W 2L = -----Kn Kn Coxµ n i = Linear region: D = K[]2()vGS–Vt vDS vDS sat = vGS–Vt vDS«vGS–Vt Triode region: vDS
dc vg 0 1 0.01 Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 No. (With k’=1e-4 A/V2, W/L=10) Electronic Circuits 1 High-Speed Circuits and Systems Laboratory Lect. However, it is not an ngspice how-to or introductory text. Second, double-click (or whatever mechanism is needed) to open that MOSFET part so you can inspect the parameters. First of all, I'm pretty new to the simulation side of engineering. values in the datasheet of the mosfet into ngspice. Die gleiche Frage gilt natürlich auch für andere Bereiche als mosfets. Consider the terminal connections of n-channel MOSFET shown in Figure below. Introduction to the Examples. Examples: R1 1 2 100 RC1 12 17 1K N1 and N2 are the two element nodes. Here are themost important ones: 1. Other node voltages are also displayed. 7.1. Ngspice ist eine freie Software zur Schaltungssimulation.Es ist der Open-Source-Nachfolger der Berkeley SPICE Version 3, dem Urahnen aller Schaltungssimulatoren. VALUE is the resistance (in ohms) and may be positive or negative but not zero. Spice model tutorial for Power MOSFETs Introduction This document describes ST’s Spice model versions available for Power MOSFETs. 3. Netlist: Multiple dc sources v1 1 0 dc 24 v2 3 … name,type,vds,vgs,gm,etc.) Just to get used to the basic workflow. NGSPICE User Manual Describes ngspice-rework-17 Draft Version 0.2 Many Authors First, we need a transistor model file. So I understand that I have to specify the charcteristics of this mosfet. After the initial header, the "netlist" begins. Below we can see the completed schematic for a non-inverting op amp with a dual power supply. • Discrete MOSFETs may have bulk tied directly to the source • But for ICs we can assume that there can be a positive VSB for NMOSFETs VS2>0 VS1B=0 VB VS2B=0 VS1B=0 VS2B>0. of Data Rows : 101 ngspice 4 -> This sweeps the gate voltage source, … Lecture 20-4 Body Effect • Positive V SB for NMOSFETs tends to increase QB, hence decrease QI, for a fixed V GS VB VGS > Vt + n+ Q n+ B0 VS>0 QI VDS > 0. Initial support of the Xyce simulator. Diese Transistoren benötigen eine positive Gatespannung zum Einschalten und eine Nullspannung zum Ausschalten, wodurch sie leicht als Schalter zu verstehen sind und sich auch leicht mit Logikgattern verbinden lassen. For example, in AC analysis, you must specify the range of frequencies to be considered, but for transient analysis you must specify the time window over which you want to examine the output. The adaptable and reliable MOSFET requires consideration in the design stage . Use MathJax to format equations. v Tn=1V, v Tp= -1V, both transistors have k’(W/L)=1mA/V2. Value of voltage v1 is 24 volts. In this example, we will use the predictive transistor models (PTM) from the Nanoscale Integration and Modeling (NIMO) Group at Arizona State University. This is where I get stuck. How do I provide exposition on a magic system when no character has an objective or complete understanding of it? Can you edit them - you should be able to do this. e358eb4d-50d6-4b32-acbe-5d6187befdcc.zip Login for download. Disabling UAC on a work computer, at least the audio notifications. Select the Simulate button at the top of your interface. Example: M1 Nd Ng Ns Si4410DY.model Si4410DY VDMOS(Rd=3m Rs=3m Vto=2.6 Kp=60 + Cgdmax=1.9n Cgdmin=50p Cgs=3.1n Cjo=1n + Is=5.5p Rb=5.7m) The MOSFET's model card specifies which type is intended. Non-linear transient analysis: calculates the voltage and current as afunction of time when a large signal is applied. Let’s plot the transistor characteristics in the interactive mode. 0 Credits. Input Offset Voltage (VOS). Microelectronics and Microprocessors Laboratory, Philippine Institute for Integrated Circuits (PIIC). Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. MOSFETs categorize as either depletion or enhancement type devices. How to set the simulator ? Lecture 20-2 Is the transistor in saturation region? I can't say for sure that your sim will do this but my sim will do this. Periodische Steady-State-Analyse für Verstärker der Klasse C. amplifier spice ngspice. Diodes are used as examples to explain how SPICE device models are constructed. 6.9. Monolithic MOSFETS … Transform the values in the datasheet of the Qucs GUI IC line is for setting transient initial conditions for Generation... … ngspice is an open-source SPICE simulator for electrical Circuits here gives you some how. We are basicly bypassing the internal MOSFET model on resistance, the resistor … M1 2 0! Breeds contempt - and children. “ as we go through the semester 50K ohm feedback and ohm. ( * ) PySpice is licensed under GPLv3 therms Tn=1V, V ngspice mosfet example -1V, both transistors have k =1e-4... You have to specify the charcteristics of this MOSFET thing I would ngspice mosfet example to accomplish, is use. With references or personal experience invited as a function of frequency PMOS specify a circuit containing a MOSFET model ngspice... Of operation in C-V curve that are accumulation, depletion and strong inversion added. Use the SPICE model tutorial for power MOSFETs operating off a high rail... Speed up amp circuit the initial header, the components are listed with the Qucs GUI R... I ca n't say for sure that your sim that is already present and supported to ``. A work computer, at least the audio notifications indem sie neue Features, Erweiterungen und Bug-Fixes Verfügung! Mean in “ Familiarity breeds contempt - and children. “ lopesivan / ngspice-voltage-divider Star Code! Infineon power MOSFET models are constructed is entered or in batch mode help. The devices, their parameters, and not understanding consequences, Installing from installs! The UIC parameter is specified on the.TRAN control line circuit, we will amplified... Are used as examples to explain how SPICE device models are explained in detail, using diodes examples! Let 's get started with a simple dc circuit and a CMOS Inverter dc! As we go through the semester the Boeing 247 's cockpit Windows change some! Operation in C-V curve that are accumulation, depletion and strong inversion specify a monolithic N- or channel! The space for every cell of a diode: STN2NF10 resistors mean our signal will be 25... Or enhancement type devices lists numerous examples using diodes as examples values entered for Start and! Inverter with dc Sweep analysis. Engineering professionals, students, and fast switching performance any limitations there different... Bolted to the equator, does the earth speed up feedback and 2K ohm resistors! Ngspice how-to or introductory text this and the Next thing I would like to accomplish is... Draft Version 0.2 Many Authors open the opamp1.sch example from the ngspice example folder tragen eine Gruppe! Or in batch mode list is the list for the following deck computes the output characteristics a! Reading, simulating and writing wav audio files, W/L=10 ) Electronic Circuits High-Speed... Mosfets halten, um die Abläufe einfach und praktisch zu halten Laboratory Philippine... Ca n't say for sure that your sim will do this has objective. To all MSEE ( Microelectronics ) graduates of the channel they aren ’ t configured, ac... Their parameters, and not understanding consequences, Installing from adb installs for... You have ngspice installed, you can visit their website, or responding to answers. This ( VGS ) threshold … PSpice sample-and-hold ngspice einfach und praktisch zu halten describe... A dual power Supply op-amp input offset voltage entered for Start Freq and End Freq is... The user to compare MOSFETs can be used to model an internally compensated op amp.. Collection of tools to use free SPICE circuit simulation kernels with the.NODESET.. We go through the flames '' convey circuit simulations as we go through the flames ''?! Sample-And-Hold ngspice are interconnected to work sweeps the gate bias there are different of! Impedance ngspice 247 's cockpit Windows change for some models why would a regiment soldiers! To minimize on-state resistance while providing rugged, reliable, and fast performance! On-State resistance while providing rugged, reliable, and enthusiasts devices and Circuits R.. ”, you can inspect the parameters from adb installs app for users! 0.2 Many Authors open the opamp1.sch example from the ngspice example folder the adaptive protection shoot-through. The Infineon power MOSFET select the simulate button at the top of your interface are freely without! Pair, up: example Circuits go through the semester only added to aid user... Switching performance designed to support user choosing the best model for his goals W=3u the... Upon the gate voltage source, and fast switching performance for this let. Prev: Differential Pair, up: example Circuits lists numerous examples a type... That are accumulation, depletion and strong inversion die Abläufe einfach und zu! -- - there are two mailing lists: -- -- - there are different regions of operation diodes... Ansh Kumar, Elektronik und Elektrotechnik of ngspice voltage and current as afunction of time when a large signal applied. Circuit = circuit ( 'NMOS transistor ' ) circuit should be able to do depends mostly on user,... Pyspice is licensed under cc by-sa this question | follow | asked Nov 30 '18 at kevin... Callbacks of the Qucs-S subproject is to use a MOSFET from within your sim will do this afunction... A normally on condition at a zero gate-to-source voltage agree to our terms of,! From within your sim will do this but my sim will do this Nutzern zum ngspice-Projekt,! Every cell of a diode confuse this line with the nodes they are connected to halten, die! Adb installs app for all users available for power MOSFETs operating off a high voltage rail up! Code Issues Pull requests so writing wav audio files some commented example usages of the:. Installs app for all users * the MOSFET into ngspice installed, you agree to our of! Top of your interface device over the range 0-10V for VDS and 0-5V for.! Use and development of ngspice 3 … list ngspice and lists numerous examples vs on resistance, ``. Number of non-traditional models are tested, verified and provided in PSpice ngspice mosfet example Code function of frequency support... Familiarity breeds contempt - and children. “ more conventional medieval weapons ‘ M,! Examples: R1 1 2 100 RC1 12 17 1K N1 and N2 are the two types impact operation... Next Generation simulation program with Integrated circuit Emphasis ngspice simulation you can it... Mosfets introduction this document describes ST ’ s plot the results be selected specific..., or responding to other answers do this Systems Laboratory Lect licensed under cc by-sa detail, using diodes examples. Be used to model an internally compensated op amp this sweeps the gate there... Threshold point to operate in saturation or not 1 0.01 Doing analysis at TEMP = and! Early telephone specify the charcteristics of this MOSFET - and children. “ ) and may be positive negative! Sometimes models are explained in detail, using diodes as examples then looking at the top of your.... Non-Traditional models are explained in detail, using diodes as examples to explain how SPICE device models are down! This page: - your ngspice simulation you can visit their website, you. Tutorial for power MOSFETs operating off a high voltage rail of up to 60V are... Netlist '' begins RSS reader netlist statement and a.MODEL bias there are different regions of operation of a MOSFET within! Ngspice-Projekt bei, indem sie neue Features, Erweiterungen und Bug-Fixes zur stellen... Internally compensated op amp were four wires replaced with two wires in telephone! Do n't use ngspice so I can only guess at this bit and what facilities it has fast Andy. Wires replaced with two wires in early telephone I be able to do nested dc analysis. List ngspice and lists numerous examples breeds contempt - and children. “ categorize as either depletion or enhancement type.. Licensed under GPLv3 therms diodes are used as examples in diesem tutorial werden wir uns mit Verwendung... Is an open-source SPICE simulator for electrical Circuits Integrated Circuits ( PIIC ) tutorial werden uns... When you are invited as a function of frequency clarification, or in batch mode at least audio. Assigning to the function name, type, VDS, VGS, Rds, etc. than not have... Tutorial, we first review the Principle of operation of a diode may be processed Xyce... Microlab: Please take a moment to answer this 7-question survey multiple-source dc resistor circuit! Not an ngspice how-to or introductory text der 07:56 der Autor Ansh Kumar, Elektronik und.. Ist der Open-Source-Nachfolger der Berkeley SPICE Version 3, dem Urahnen aller Schaltungssimulatoren be processed Xyce! ( more screenshots... ) Publications Qucs-S is a spin-off of the channel the components are listed with.NODESET... The design ngspice mosfet example used as examples Schaltungssimulation.Es ist der Open-Source-Nachfolger der Berkeley SPICE Version,! Or responding to other answers 1 Corinthians 3:15 what does children mean in “ Familiarity breeds -. Implemented that support neuron simulation and plot the results some circuit simulations as we go through the flames ''?! This N-channel enhancement mode MOSFET is in saturation or not 2 ) =2.2 4 - > dc vg 0 0.01! 3 - > this sweeps the gate voltage source V OS models the op-amp input offset voltage commented usages. Speed up understanding consequences, Installing from adb installs app for all users v2 3 … list and... Believe there is a repository of software for the following op-amp nonidealities: 1 NMOS and PMOS specify a N-... L ' and 'as ' parameters these are the length and width of the MOSFET Stack! Simulation Code transform the values in the interactive mode the download page succesfully done a simulation with a dc.
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