Sidelinesoft NL5 Circuit Simulator 2.6 Build 1  NL5電路模擬器
NL5是一款功能強大的模擬電子電路模擬器，使用旨在幫助用戶處理理想的分段線性組件。NL5具有簡單的集成方法，數值問題很容易發現和避免。先進的瞬時切換算法。可接受任意（甚至無法實現）的拓撲，組件參數和仿真條件以及使用NL5評估新的設計思想，使用非常簡單的“理想”組件，模型和方法來證明設計概念。NL5不僅適合經驗豐富的工程師，他們可以利用超快速和強大的算法來模擬相當大的系統，因為SPICE固有的收斂問題不再是問題。強大的腳本語言和HTTP鏈接使用戶可以使用NL5本身執行複雜的任務，並將其用作具有常用工程工具（例如MATLAB®，PYTHON等）的“附加”仿真引擎。也同樣適合初學者和學習電子產品的學生。學習曲線幾乎可以忽略不計，開始使用NL5只需具備Windows操作系統的基礎知識。友好而直觀的界面允許快速修改原理圖，甚至在仿真運行時進行“即時”編輯，從而為“如果……怎麼辦？”問題提供即時答案。NL5是用於幾乎所有類型的電子電路的出色模擬工具：從納秒級傳輸線和大功率RF發生器，到精密儀器和數字信號處理。它可以被許多學科的研究人員成功地用於系統仿真，例如力學，傳熱，流體動力學等。NL5具有高性能、超快的速度、行業標準易於使用、高度直觀的界面等優勢，傳統的基於SPICE的仿真器試圖使用具有數十個參數的非線性份量的“真實”模型執行精確的仿真時，NL5使用的是相反的方法。它提供了非常簡單的“理想”組件，而不是複雜的模型。NL5的另一個重要功能是能夠即時切換理想開關和二極管。NL5使用其分段線性（PWL）表示代替了準確的“真實”非線性模型。與PWL模型的仿真相比，幾乎在仿真的每個步驟中，求解複雜的非線性方程都可以更快地執行。

NL5istheNon-LinearElectronicCircuitSimulator.ThefirstversionofNLforpersonalcomputerswasdevelopedintheearly‘90sasatoolforswitchingpowersuppliesdesign.SincethenNLhasevolvedintotheMicrosoftWindows®-basedNL4,whichhasbeenusedextensivelybyworld-classengineersindifferentfieldsofelectronicsforalmost10years.NL5isthefirstversiontobepubliclyavailable.

HowdoesNL5work?
UnlikeconventionalSPICE-basedsimulators,whichpretendtoperformaccuratesimulationofelectroniccircuitsusingcomplexanddetailednon-linearcomponentmodelswithdozensofparameters,theNL5approachisquitedifferent.

First,NL5dealswithidealcomponentsasmuchaspossible.Anidealcomponentisonethatprovidesjustabasicfunctionalityrequiredforcomponentofthattype.Asarule,itisverysimpleanddescribedbyaminimalnumberofparameters.Asaresult,itsbehaviorisclearandpredictable.Forexample,anidealswitchhaszeroresistancewhenclosed,infiniteresistancewhenopen,anditisswitchinginstantly.Forsuchaswitchnoparametersarerequiredatall.

Second,non-linearcomponents(e.g.diodes,transistors,oramplifiers)arerepresentedaspiecewiselinear(PWL):consistingofanumberoflinearsegments.Forinstance,asimplediodeiseitheropenorclosed,sothatitsPWLrepresentationconsistsofjusttwosegments.Aslongasallofthecomponentsarestayingwithintheircurrentlinearsegment,thesamesystemoflinearequationscanbeused.Thesystemismodifiedonlyatthemomentswhenatleastonecomponentchangesitslinearsegment.Thiscanalwaysbedonemuchfasterthansolvingcomplexnon-linearequationsatalmosteverystepofsimulation,whichiswhatSPICE-basedsimulatorsusuallydo.

UnderstandingtheseNL5principlesgivesusersfullcontrolofthesimulationprocess.UsingidealcomponentswithsimplePWLmodelsresultsinanextremelyfastsimulation,andgivesageneralideaofcircuitfunctionalityveryquickly.Ontheotherhand,moreaccurateresultscanbeobtainedbyidentifyingcriticalcomponents(thosethataffectcircuitperformancethemost),andusingmorecomplexmodelsforthosecomponents.Thus,userscanalwaysmakeareasonabletrade-offbetweensimulationspeedanddesiredlevelofaccuracy.

WhyuseNL5?
NL5’smajoradvantageisitsabilitytodoiterationsoftheschematicandperformasimulationextremelyfast.Thisisespeciallyimportantinearlystagesofaproject,when,usingidealcomponentsandsimplemodels,engineerscanevaluateageneralconceptandprovethefeasibilityofthedesignveryquickly.Afterthat,athoroughanalysiscanbeperformedbyapplyingmoreaccuratemodelsandaddingreasonablecomplexitytocriticalcomponents.

Despitebeingoriginallydesignedforsimulatingswitchingpowersupplies,NL5hasprovedtobeanexcellentsimulationtoolforalmostanytypeofelectroniccircuitry,fromnanosecondstransmissionlinesandhighpowerRFgenerators,toprecisioninstrumentationanddigitalsignalprocessing.RecentlyaddedfrequencydomainanalysisandsomequiteuniquefeaturesbroadenNL5’shorizons,offeringengineersalmostalltheywouldeverneedforproductivework.

WhocanuseNL5?
NL5perfectlyfitstheneedsofallusers,regardlessoftheirexperience,interests,andexpectations.

NL5isidealfornovicesandstudentsstudyingelectronics.Thelearningcurveisnegligiblyshort:basicknowledgeoftheWindows®operatingsystemisallthat’sneededtostartworkingwithNL5.Afriendlyandintuitiveinterfaceallowsfastmodifyingoftheschematic,even“on-the-fly”editingwhilethesimulationisrunning,thusgivinginstantanswersto“whatif…?”questions.

Experiencedengineerscansimulateratherlargesystems,takingadvantageofextremelyfastandrobustalgorithm,sincetheconvergenceprobleminherenttoSPICEisnolongeranissue.Asimple,yetpowerful,scriptinglanguageallowstheusertoperformcomplextasksrunningNL5as“add-on”simulationenginewithpopularengineeringtoolssuchasMATLAB®andothers.

DuetotheverybasicnatureofidealcomponentsusedinNL5,itsapplicationareaisnotlimitedtoelectronics.Itcanbesuccessfullyusedforsystemssimulationbyresearchersinmanydisciplines,suchasmechanics,thermodynamics,fluiddynamics,tonameafew.

WhatsNew:
1.FixedFileandPWLsignalmodels.
2.FixedexponentialriseandfallofPulsemodel.
3.FixedDuplicatetracesoperationforBusandDigitaltracetypes.
4.ThisisthelastrevisionofNL5ver.2.

Homepage
http://nl5.sidelinesoft.com