ADS设计低噪放的详细步骤
详细介绍了使用ADSS设计低噪声放大器的步骤，非常适合初学者使用，图文并茂，难度适宜。(二)实验内容了解微波低噪声放大器的工作原理使用ADS软件设计一个低噪声放大器,并对其参数进行优化、仿真■根据软件设计的结果绘制电路版图,并加工成电路板对加工好的电路进行调试,使其满足设计要求三)低噪声放大器的技术指标输入输出反射系数噪声系数放大器增益稳定系数■通带内的增益平坦度(四)用ADS软件设计低噪声放大器本节内容是介绍使用ADS软件设计低噪声放大器的方法:包括原理图绘制,电路参数的优化、仿真,版图的仿真等下面开始按顺序详细介绍用ADS软件设计低噪声放大器的方法1放大器设计的基本准备需要明确的概念S参数、放大器增益(平坦度)、噪声系数、噪声温度、动态范围、三阶交调与1dB压缩)Y稳定性、匹配需要学习的知识匹配电路有哪些形式对晶体管如何馈电And so on2.软件仿真中需要注意的几个问题要有好的软件设计习惯各种文件的命名电路的布局以及参数的设置和选择要有合理的设计顺序要记住你在使用的是软件物理概念要明确,不要在无意义的地方花时间比如:按照加工精度,有些线条太细是不能实现的,另外追求小数点后面N位的精确也是无聊的法高您毫中使用类的速用范围,:比如:小坛模羋就不能用来看≡阶>W,软件中的模型才是对的。等等。注意如何规划仿真,才能尽快得到需要的电路■要按照先局部后整体的优化,切忌直接全局优化,最好能够预先计算设置优化元件的初值。要注意仿真的数值稳定性,对于对参数以来敏感的仿真结果在最后制作的时候是很难实现的。适当的时候需要考虑改系统拓扑。养成不明白就多看看help的习惯2软件仿真中需要注意的几个问题仿真时模型的选择1晶体管■sp模型:属于小信号线性模型,模型中已经带有了确定的直流工作点,和在一定范围内的S参数,仿真时要注意适用范围。S模型只能得到初步的结果,对于某些应用来说已经足够,不能用来做大信号的仿真,或者直流馈电电路的设计,不能直接生成版图。大信号模型:可以用来仿真大、小信号,需要自行选择直流工作点,仿真时要加入馈电电路和电源带有封装的大信号模型可以用来生成版图2.软件仿真中需要注意的几个问题■仿真时模型的选择2集总参数元件电容、电阻、电感:在进行电路优化时,可以直接选用参数连续变化的模型,在系统设计最后,需要把这些优化过的元件替换为器件库中系列中的元件才是可以制作电路、生成版图的。替换时选择与优化结果相近的数值,替换后要重新仿真次,检验电路性能是否因此出现恶化。3ADS的使用启动软件后建立新的工程文件并打开原理图设计窗口Fle Edt Select wisw Insert Options Tools Layout Simulate windowDesimnGude Heb回倒0?小包型A到Lumped-Components黑山圖回翻‖Dc Feed O:BckEHOHI MI NLF01251375
- 2020-11-05下载
- 积分：1
Vehicle Dynamics Theory and Application
不错的汽车动力学教材，是参与汽车底盘电子开发的动力学基础。Reza n. jazarVehicle DynamicsTheory and ApplicationsSpringerReza n. jazarDept of Mechanical EngineeringManhattan collegeRiverdale. NY 10471ISBN:978-0-387-74243-4e-ISBN:978-0-387-74244-1Library of Congress Control Number: 200794219c 2008 Springer Science+ Business Media, LLCAll rights reserved. This work may not be translated or copied in whole or in part without thewritten permission of the publisher(Springer Science+Business Media, LLC, 233 SpringStreet, New York, NY 10013, USA), except for brief excerpts in connection with reviews orscholarly analysis. Use in connection with any form of information storage and retrievalelectronic adaptation, computer software, or by similar or dissimilar methodology now knownor hereafter developed is forbidden. The use in this publication of trade names, trademarksservice marks and similar terms, even if they are not identified as such, is not to be taken as anexpression of opinion as to whether or not they are subject to proprietary rightsPrinted on acid-free paper987654321springer. comKavoshmy daughter, Vazan,and my wife, MojganHappiness is when you win a race against yourselfPrefaceThis text is for engineering students. It introduces the fundamental knowledge used in vehicle dymamics. This knowledge can be utilized to developcomputer programs for analyzing the ride, handling, and optimization ofroad vehiclesVehicle dynamics has been in the engineering curriculum for more thana hundred years. Books on the subject are available, but most of themare written for specialists and are not suitable for a classroom applicationA new student, engineer, or researcher would not know where and howto start learning vehicle dynamics. So, there is a need for a textbook forbeginners. This textbook presents the fundamentals with a perspective onfuture trendsThe study of classical vehicle dynamics has its roots in the work ofgreat scientists of the past four centuries and creative engineers in thepast century who established the methodology of dynamic systems. Thedevelopment of vehicle dynamics has moved toward modeling, analysisand optimization of multi-body dynamics supported by some compliantmembers. Therefore, merging dynamics with optimization theory was anexpected development. The fast-growing capability of accurate positioninsensing, and calculations, along with intelligent computer programming arethe other important developments in vehicle dynamics. So, a textbook helpthe reader to make a computer model of vehicles, which this book doesLevel of the bookThis book has evolved from nearly a decade of research in nonlineardynamic systems and teaching courses in vehicle dynamics. It is addressedprimarily to the last year of undergraduate study and the first year graduatestudent in engineering. Hence, it is an intermediate textbook. It providesboth fundamental and advanced topics. The whole book can be coveredin two successive courses, however, it is possible to jump over some sections and cover the book in one course. Students are required to know thefundamentals of kinematics and dynamics, as well as a basic knowledge ofnumerical methodsThe contents of the book have been kept at a fairly theoretical-practicallevel. Many concepts are deeply explained and their application empha-sized, and most of the related theories and formal proofs have been explained. The book places a strong emphasis on the physical meaning andapplications of the concepts. Topics that have been selected are of highinterest in the field. An attempt has been made to expose students to aPrefacebroad range of topics and approachese There are four special chapters that are indirectly related to vehicle dy-amics: Applied Kinematics, Applied Mechanisms, Applied dynamics, andApplied vibrations. These chapters provide the related background to understand vehicle dynamics and its subsystemsOrganization of the bookThe text is organized so it can be used for teaching or for self-studyChapter 1"Fundamentals, "contains general preliminaries about tire andrim with a brief review of road vehicle classificationsPart I"One Dimensional Vehicle Dynamics, " presents forward vehicledynamics, tire dynamics, and driveline dynamics. Forward dynamics refersto weight transfer, accelerating braking, engine performance, and gear ratiodesignPart II"Vehicle Kinematics, presents a detailed discussion of vehiclemechanical subsystems such as steering and suspensionsPart IIT"Vehicle Dynamics, employs Newton and Lagrange methodsto develop the maneuvering dynamics of vehiclesPart Iv "Vehicle Vibrations, presents a detailed discussion of vehi-cle vibrations. An attempt is made to review the basic approaches anddemonstrate how a vehicle can be modeled as a vibrating multiple degreeof-freedom system. The concepts of the Newton-Euler dynamics and La-grangian method are used equally for derivation of equations of motionThe RMS optimization technique for suspension design of vehicles is intro-duced and applied to vehicle suspensions. The outcome of the optimizationtechnique is the optimal stiffness and damping for a car or suspended equipmentMethod of presentationThis book uses a fact-reason-application"structure. The "fact"is themain subject we introduce in each section. Then the reason is given as a" proof. The application of the fact is examined in some examples. Theexamplesare a very important part of the book because they show howto implement the facts. They also cover some other facts that are neededto expand the subjectPrerequisitesSince the book is written for senior undergraduate and first-year graduatelevel students of engineering, the assumption is that users are familiar withmatrix algebra as well as basic dynamics. Prerequisites are the fundamentals of kinematics, dynamics, vector analysis, and matrix theory. Thesebasics are usually taught in the first three undergraduate yearsPrefaceUnit SystemThe system of units adopted in this book is, unless otherwise stated, theinternational system of units(SI). The units of degree(deg)or radian(rad)are utilized for variables representing angular quantitiesSymbolse Lowercase bold letters indicate a vector. Vectors may be expressed inan n dimensional Euclidian space. ExamplerCUppercase bold letters indicate a dynamic vector or a dynamic matrix, such as force and moment. ExampleFo Lowercase letters with a hat indicate a unit vector. Unit vectors arenot bolded. ExampleLowercase letters with a tilde indicate a 3 x 3 skew symmetric matrixassociated to a vector. Examplea3211An arrow above two uppercase letters indicates the start and endpoints of a position vector. ExampleON = a position vector from point o to point Ne The length of a vector is indicated by a non-bold lowercase letterExampleCapital letter B is utilized to denote a body coordinate frame. ExampleB(ocgB(Oxyz)B1(o1x19121)ⅹ11PrefaceCapital letter G is utilized to denote a global, inertial, or fixed coordinate frame. ExampleG(XYZG(OXYZRight subscript on a transformation matrix indicates the departureframes. ExampleRB= transformation matrix from frame B(oxyz)Left superscript on a transformation matrix indicates the destinationframe. ExampleRBtransformation matrix from frame B(o cgz)to frame G(OxYZ)Capital letter R indicates rotation or a transformation matrix, if itshows the beginning and destination coordinate frames. Example0BSIn a0Whenever there is no sub or superscript, the matrices are shown in abracket. ExampleCOS asin a osIn aCOs O0e Left superscript on a vector denotes the frame in which the vectoris expressed. That superscript indicates the frame that the vectorbelongs to; so the vector is expressed using the unit vectors of thatEr= position vector expressed in frame G(OXYZ)Right subscript on a vector denotes the tip point that the vector isreferred to. ExamplePsition vector ofexpressed in coordinate frame G(OXYZ)Right subscript on an angular velocity vector indicates the frame thatthe angular vector is referred to. ExampleB= angularof the body coordinate frame B(oxyz)
- 2020-12-12下载
- 积分：1
