登录
首页 » Others » MicroElectronic Circuit Design

MicroElectronic Circuit Design

于 2020-12-10 发布
0 442
下载积分: 1 下载次数: 0

代码说明:

微电子电路设计第五版,Richard C. Jaeger, Traveis N. Blalock编著。FIETH EDITIONMICROELECTRONICHM-M- CIRCUIT DESIGNRICHARD C. JAEGERAuburn UniversityTRAVIS N. BLALOCKUniversity of VirginiaMcGrawEducationGrawEducationMICROELECTRONIC CIRCUIT DESIGN. FIFTH EDITIOPublished by McGraw-Hill Education, 2 Penn Plaza, New York, NY 10121 CopyrightC 2016 by McGraw-Hill EducationAll rights reserved. Printed in the United States of America. Previous editions 2011, 2008, and 2004. No part of thispublication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system,without the prior written consent of McGraw-Hill Education, including, but not limited to, in any network or otherelectronic storage or transmission, or broadcast for distance learninSome ancillaries, including electronic and print components, may not be available to customers outside the United StatesThis book is printed on acid-free pape1234567890DOw/DOw1098765ISBN978-0-07-352960-8MHID0-07-352960-5sident Products markets Kurt LVice President, General Manager, Products Markets: Marty Langece President, Content Design Delivery: Kimberly Meriwether DavidManaging director: Thomas TimpGlobal Publisher Raghu srinivasanDirector. Prodrelopment: RoDirector, Digital Content Development: Thomas Scaife, Ph DProduct develoVincent brashMarketing manager: Nick Mc faddenDirector, Content Design Delivery: Linda avenariusProgram meSchillingContent Project Managers: Jane Mohr, Tammy Juran, and Sandra M. SchneeBuyer: Jennifer PickelDesign: Studio Montage, St Louis, MOContent Licensing Specialist: DeAnna DausenerCompositor: MPS LimitedPrinter.R. DonnellAll credits appearing on page or at the end of the book are considered to be an extension of the copyright pageLibrary of Congress Cataloging-in-Publication DataJaeger. Richard cMicroelectronic circuit design/Richard C. Jaeger, Auburn University,Travis N. Blalock, University of Virginia. --Fifth editionpages cmIncludes bibliographical references and indexISBN978-0-07-352960-8(alk. paper)-ISBN0-07-338045-8(alk. paper)d 1. Integrated circuits--Design and construction. 2. Semiconductors--Design and construction. 3. Electronic circuitesign. I. Blalock, Travis N. Il. TitleTK7874.J3332015621.3815-dc232014040020The Internet addresses listed in the text were accurate at the time of publication. The inclusion of a website does not indicatean endorsement by the authors or McGraw-Hill Education, and McGraw-Hill Education does not guarantee the accuracy ofthe information presented at these siteswww.mhhe.comTOTo Joan, my loving wife and life long partnerRichard C. JaegerIn memory of my father, Professor Theron vaughnBlalock, an inspiration to me and to the countlessstudents whom he mentored both in electronicdesign and in life.Travis n blalockBRIEF CONTENTSPreface xxChapter-by-Chapter Summary XXV12 Operational Amplifier Applications 685PART ONE13 Small-Signal Modeling and LinearSOLID-STATE ELECTRONICS AND DEVICESAmplification 77014 Single-Transistor Amplifiers 8411 Introduction to Electronics 32 Solid-State Electronics 4115 Differential Amplifiers and Operational Amplifier3 Solid-state Diodes and Diode circuits 72Design 9524 Field-Effect Transistors 14416 Analog Integrated Circuit Design Techniques 10315 Bipolar Junction Transistors 21517 Amplifier Frequency Response 111318 Transistor Feedback Amplifiers andPART TWOOscillators 1217DIGITAL ELECTRONICSAPPENDICES6 Introduction to Digital Electronics 2837 Complementary MOS (CMOS) Logic Design 359A Standard Discrete Component Values 12918 MOS Memory Circuits 414B Solid-State Device Models and sPIce simulationParameters 12949 Bipolar Logic Circuits 455C TWo-Port Review 1299PART THREIndex 1303ANALOG ELECTRONICS10 Analog Systems and Ideal OperationalAmplifiers 51711 Nonideal Operational Amplifiers and FeedbackAmplifier Stability 587CONTENTSPreface xxCHAPTER 2Chapter-by-Chapter Summary XXVSOLID-STATE ELECTRONICS 41PART ONE2.1 Solid-State Electronic materials 432.2 Covalent bond model 44SOLID-STATE ELECTRONICS2.3 Drift Currents and mobility inAND DEVICES 1Semiconductors 472.3.1 Drift Currents 47CHAPTER 12.3.2 Mobility 48INTRODUCTION TO ELECTRONICS 32.3.3 Velocity Saturation 482.4 Resistivity of Intrinsic Silicon 491.1 A Brief History of Electronics: From2.5 Impurities in Semiconductors 50Vacuum Tubes to Giga-Scale Integration 52.5.1 Donor Impurities in silicon 511.2 Classification of Electronic Signals 82.5.2 Acceptor Impurities in Silicon 511.2.1 Digital signals 92.6 Electron and hole concentrations in1.2.2 Analog Signals 9Doped semiconductors 511.2.3 A/D and D/A Converters--Bridging2.6.1Type Material (ND >NA)52the analog and Digital2.6.2 p-Type Material (N,A>ND)53Domains 102.7 Mobility and Resistivity in Doped1.3 Notational conventions 12Semiconductors 541.4 Problem-Solving Approach 132.8 Diffusion currents 581.5 Important Concepts from Circuit2. 9 Total Current 59Theory 152.10 Energy Band Model 601.5.1 Voltage and current Division 152.10.1 Electron-Hole pair generation in1.5.2 Thevenin and norton circuitan intrinsic semiconductor 60Representations 162.10.2 Energy Band Model for a Doped1.6 Frequency Spectrum of ElectronicSemiconductor 61Signals 212.10.3 Compensated semiconductors 611.7 Amplifiers 222.11 Overview of Integrated circuit1.7.1 Ideal operational amplifiers 23Fabrication 631.7.2 Amplifier Frequency Response 25Summary 661.8 Element Variations in Circuit Design 26Key Terms 671.8.1 Mathematical modeling ofReference 68Tolerances 26Additional Reading 681.8.2 Worst-Case Analysis 27Problems 688.3 Monte Carlo analysis 291.8.4 Temperature Coefficients 32CHAPTER 31.9 Numeric Precision 34SOLID-STATE DIODES AND DIODE CIRCUITS 72Summary 34Key Terms 353.1 The pn Junction Diode 73References 363.1.1 pn Junction Electrostatics 73Additional Reading 363.1.2 nternal diode currents 77Problems 363.2 The i-v Characteristics of the diode 78VIllContents3.3 The Diode Equation: A Mathematica3.15 Full-Wave Bridge Rectification 123Model for the diode 803.16 Rectifier Comparison and Design3.4 Diode Characteristics under reverse, ZeroTradeoffs 124and forward bias 833.17 Dynamic Switching Behavior of the Diode 1283.4.1 Reverse bias 833.18 Photo diodes, solar cells, and3. 4.2 Zero bias 83Light-Emitting Diodes 1293.4.3 Forward Bias 843.18.1 Photo diodes and3.5 Diode Temperature Coefficient 86Photodetectors 1293.6 Diodes under reverse bias 863.18.2 Power Generation from Solar Cells 1303.6.1 Saturation Current in real3.18. 3 Light-Emitting Diodes(LEDs)13Diodes 87Summary 1323.6.2 Reverse Breakdown 89Key Terms 1333.6.3 Diode model for the breakdownReference 134Region 90Additional Reading 1343.7 pn Junction Capacitance 90Problems 1343.7.1 Reverse bias 903.7.2 Forward Bias 91CHAPTER 43.8 Schottky Barrier Diode 933.9 Diode SPICE Model and layout 93FIELD-EFFECT TRANSISTORS 1443.9.1 Diode Layout 944.1 Characteristics of the MOS Capacitor 1453.10 Diode Circuit Analysis 954.1.1 Accumulation Region 1463.10.1 Load-Line Analysis 964.1.2 Depletion Region 1473.10.2 Analysis Using the Mathematical4.1.3 Inversion Region 147Model for the diode 974.2 The nmos transistor 1473.10.3 The Ideal diode model 1014.2.1 Qualitative i-v Behavior of the3.10.4 Constant Voltage Drop Model 103NMOS Transistor 1483.10.5 Model Comparison and4.2.2 Triode Region Characteristics ofDiscussion 104the nmos transistor 1493.11 Multiple-Diode Circuits 1054.2.3 On Resistance 1523.12 Analysis of Diodes Operating in the4.2.4 Transconductance 153Breakdown Region 1084.2.5 Saturation of the i-v3.12.1 Load-Line Analysis 108Characteristics 1543.12.2 Analysis with the Piecewise4.2.6 Mathematical model in theLinear model 108Saturation (Pinch-off)3.12.3 Voltage regulation 109Region 1553.12.4 Analysis Including Zener4.2.7 Transconductance in saturation 156Resistance 1104.2.8 Channel-Length Modulation 1563.12.5 Line and Load Regulation 1114.2.9 Transfer characteristics and3.13 Half-Wave Rectifier Circuits 112Depletion-Mode MosFETs 1573.13.1 Half-Wave Rectifier with resistor4.2.10 Body Effect or SubstrateLoad 112Sensitivity 1593.13.2 Rectifier Filter Capacitor 1134.3 PMOS Transistors 1603.13.3 Half-Wave Rectifier with rc load 1144.4 MOSFET Circuit Symbols 1623. 13.4 Ripple Voltage and Conduction4.5 Capacitances in MOS Transistors 165Interval 1154.5.1 NMOs Transistor Capacitances in3.13.5 Diode Current 117the Triode region 1653.13.6 Surge Current 1194.5.2 Capacitances in the Saturation3.13.7 Peak-Inverse-Voltage(PlV)Rating 119Region 1663.13.8 Diode Power Dissipation 1194.5.3 Capacitances in Cutoff 1663.13.9 Half-Wave Rectifier with Negative4.6 MOSFET Modeling in SPICE 167Output Voltage 1204.7 MOS Transistor Scaling 1683.14 Full-Wave Rectifier Circuits 1224.7.1 Drain Current 1693. 14.1 Full-Wave Rectifier with Negative4.7.2 Gate Capacitance 169Output Voltage 1234.7.3 Circuit and power densities 169ContentsIX4.7.4 Power-Delay Product 1705.3 The pnp Transistor 2234.7.5 Cutoff Frequency 1705.4 Equivalent Circuit Representations for the4.7.6 High Field Limitations 171Transport Models 2254.7.7 The unified mos transistor model5.5 The i-v Characteristics of the bipolarIncluding High Field Limitations 172Transistor 2264.7.8 Subthreshold conduction 1735.5.1 Output Characteristics 2264.8 MOs Transistor Fabrication and layout5.5.2 Transfer characteristics 227Design Rules 1745.6 The Operating Regions of the Bipolar4.8.1 Minimum Feature size andTransistor 227Alignment Tolerance 1745.7 Transport Model Simplifications 2284.8.2 Mos Transistor Layout 1745.7.1 Simplified Model for the Cutoff4.9 Biasing the NMOS Field-EffectRegion 229Transistor 1785.7.2 Model Simplifications for the4.9.1 Why Do We Need Bias? 178Forward-Active Region 2314.9.2 Four-Resistor Biasing 1805.7.3 Diodes in Bipolar Integrated4.9.3 Constant Gate-Source VoltageCircuits 237Bias 1845.7.4 Simplified Model for the4.9.4 Graphical analysis for theReverse-Active Region 238Q-Point 1845.7.5 Modeling Operation in the4.9.5 Analysis Including Body Effect 184Saturation Region 2404.9.6 Analysis Using the Unified5.8 Nonideal Behavior of the bipolarModel 187Transistor 2434.10 Biasing the PMos Field-Effect Transistor 1885.8.1 Junction Breakdown Voltages 2444.11 The junction Field-Effect Transistor5.8.2 Minority-Carrier Transport in theUFET190Base Region 2444.11.1 The JFET With Bias Applied 195.8.3 Base Transit time 2454.11.2 JFET Channel with Drain-Source5.8.4 Diffusion Capacitance 247Bias 1935.8.5 Frequency Dependence of the4.11.3 n-Channel jfet i-v Characteristics 193Common-Emitter current gain 2484.11.4 The p-Channel JFET 1955.8.6 The Early Effect and Early4.11.5 Circuit Symbols and JFET ModelVoltage 248Summary 1955.8.7 Modeling the Early Effect 2494.11.6 JFET Capacitances 1965.8.8 Origin of the Early Effect 2494.12 JFET Modeling in Spice 1965.9 Transconductance 2504.13 Biasing the JFET and Depletion-Mode5.10 Bipolar Technology and sPiCe Model 251MOSFET 1975.10.1 Qualitative Description 251Summary 2005.10.2 SPICE Model Equations 252Key Terms 2025.10.3 High-Performance BipolarReferences 202Transistors 253Problems 2035.11 Practical bias circuits for the bjt 2545.11.1 Four-Resistor bias network 256CHAPTER 55.11.2 Design Objectives for theBIPOLAR JUNCTION TRANSISTORS 215Four-Resistor bias network 2585.11.3 terative Analysis of the5.1 Physical Structure of the BipolarFour-Resistor bias circuit 262Transistor 2165.12 Tolerances in bias circuits 2625.2 The Transport Model for the npn5. 12.1 Worst-Case Analysis 263Transistor 2175. 12.2 Monte Carlo Analysis 2655.2.1 Forward Characteristics 218Summary 2685.2.2 Reverse Characteristics 220Key Terms 2705.2.3 The Complete Transport ModelReferences 270Equations for Arbitrary BiasProblems 271Conditions 221

下载说明:请别用迅雷下载,失败请重下,重下不扣分!

发表评论

0 个回复

  • VERILOG语言实现数字时钟
    具有时、分、秒的计数和显示功能,以24小时循环计时;具有清零,整点报时功能
    2021-05-06下载
    积分:1
  • CVPR2018论文_oral
    CVPR2018的oral论文合集,Oral一共有68篇,受上传文件大小限制,分成part1和part2压缩文件。Oral论文是CVPR中最优质的论文,best paper/honorable mention什么的都在oral里面。我花了很多工夫整理出来,来分享给各位CVer。还有少数几篇论文暂时没公开,所以只找出64篇。还有一点要说明:该文档仅作交流学习用处,不能当作商业用途。
    2020-05-28下载
    积分:1
  • 浙大数据结构(电子版)
    帮助你学习数据结构,使你熟练掌握数据结构
    2021-05-06下载
    积分:1
  • 智能家居系统QT源代码
    智能家居项目QT源源码,适用于TQ2440的毕业设计项目。
    2020-12-04下载
    积分:1
  • stm32F4电机BLDC控制
    控制芯片用的STM32F4,控制对象向BLDC,一般方波控制,不是foc控制,调试通过,直接可以用的bldc控制程序
    2020-12-01下载
    积分:1
  • 五层电梯PLC程序设计.docx
    【实例简介】详细的五层电梯PLC程序设计与监控组态设计
    2021-12-03 00:35:00下载
    积分:1
  • java socket 网络五子棋
    可以网络对战,五子棋对战,java socket开发的,源码完整,绝对物有所值
    2020-12-09下载
    积分:1
  • TCP转发工具
    TCP转发工具v1.0.0(基于IOCP)连接为一一映射,且有保持连接的功能,支持多级转发。客户端--->转发工具(fs前端服务端--->bc后端客户端)--->后端服务端理论上支持任何TCP下的协议转发,目前已测试了自定义的TCP协议、MYSQL协议 和HTTP、HTTPS协议。该工具不对数据做任何处理,只负责转发,所以Http协议如果有Host相关定义需要在机器上做Host映射。使用说明:bcmgr.ini和fsmgr.ini是对 转发工具 里提及的两个端做配置(超时配置也在里面做)。config.ini[Listen]#前端服务端Host=监听端口,默认删除
    2020-11-28下载
    积分:1
  • maple中文教程
    maple教程,让你更好的学习maple,教程完整而且全面1.3 Maple的基本功能maillist: mathgroupowolfram comMaple的网络资源:http://www.maplesoft.comhttp://daisy.uwaterloo.caftp//ftp.maplesoft.commaillist: maple-listodaisy uwaterloo caMatlab的网络资源http://www.mathworks.comftp//ftp.mathworks.comnews: //comp. soft-sys matlabREDUCE的网络资源http://www.rrz.uni-koeln.de/reducehttp://www.zib.de/symbolik/reduceftp: //ftp. rand. org/software_and_data/reduce符号计算研究机构及信息中心http://t mcs. kelh七七p://ww.cain.nl/http://www.risc.uni-linz.ac.atnews: //sci. math. symbolic其它符号计算软件的网络地址Derivehttp://www.derive.comMacaulay2http://www.math.uiuc.edu/macaulay2/Macsymahttp://www.macsyma.comMagmahttp://www.maths.usydeduau:8000/u/magma,Mathcadhttp://www.mathsoft.com№uPadhttp://www.mupad.deScilabhttp://www-rocq.inria.fr/scilab/13 Maple的基本功能计算札代数系统与其它计算札语言的木质区别是:计算机代数系统具有符号计算的能力,为用户提供交互式的计算环境,可以进行常规的数学计算,可以根据给定的数学函数画出函数的二维或三维图形.下面我们简要描述 Maple的基本功能数值计算对于普通的数, Maple总是进行精确的计算,这种规则对于有理数和无理数是相冋的.因此对于无珥数 Maple按照有关的数学规则进行计算,只有当用户需要计算浮点数近似值时, Maple才按照用户要求的精度计算>1/5+1/49第一章 Maple系统简介5!/21evalf o%)5.7142857141f(Pi,40)3.14159265589793238462643:383279502884197>2.496745643/2;1.248372822>abs(3+5*I);>(3+4*I)/(1+工);从上面的例子可以看到,对于复薮Mape按照复数的规则进行计算.多项式符号计算系统的最基本功能是处理符号表达式,多项式则是最基本的符号表达式.从下面的例子中可以看到 Maple可以用各种方式处理多项式、三角表达式、指数与对数等许多数学表达式> factor(x^4+2*x^3-12米x^2+40*x-64(x-2)(x3+4x2-4x:+32)expand((x+1)"5)+5x4+10x3+10:2+5x+1lify (exp (x*log(y)))simplify(sin(x)2+cos(x)2)> xpand((x2-a)^3*(x+b-1));x7+x6b-26-3:5a-3x4ab+34a+3x3a2+3x2a2b-3x2a2-a3-a3b+a3expand(cos (4*x)+4*cos(2*x)+3, trig)1.3Mapl的基本功能bine(4*cos(x)"3, trig)cos (3 c)+3 cos(a)解方程用 Maple来解简单的方程是毫无问题的,即使是很复杂的方程 Maple也可以用数值计算的方法来处理.>Slve(x^2-3*x=2,x);31>g1sys:={2*x+31,x-y-z=4,3*x+7*z=3solve(glsys)24974311> fsolve({x2+y2=10,x^y=2},{x,y});{=3.102449071,y=.6122170880}矩阵计算Mapl还有许多命令可以处理矩阵和向量,不过需要调用线性代数软件包1inag.还有一点特别的是,作矩阵的乘法需要一个特殊的算子&*>with (linalg)Warning, new definition for normWarning, new definition for traceatrix([[2,3],[1,4]);2314inverse(a), det(a)([L,x],[y,z]])b:=第一章 Maple系统简介eval(a+b)2+03++y4+eval(a &* b)2w+3y2x+3+4yx+4极限,求和与乘积对于普通的求极限问题,可以接用 Maple来计算,它还可以符号的计算级数的和与积.当符号计算不成功时,还可以作数值计算>1imit((sqrt(1+x)-1)/x,x=0);limit(x!/xx, infinity);y);evalf(product(1+1/x"2, x=1.. infinity ));3.676077910微分与积分用 Maple来求微分是相当容易的,使用diff命令即可以求出数学表达式的微分,不过求出的结果可能是相当复杂,因此運常还要用 simplify命令进行化简.求数学表达式的定积分和不定积分就相对复杂一些,需要某些特定的算法.对于复杂的函数,求出的结果可能是某些特殊函数.对于定积分,还可以用eva1f求出积分的数值.simplify(diff((x-1)/(x"2+1), x));1-2diff(sin(x*y),x);g ) yint(1/(1+x+x^2),x);2cH1.3 Maple的基本功能int(sin(x 2),x=a.b)FresnelS(bint(sin (x)/x, x=o.5)eva1.549931245微分方程对于不太复杂的常微分方程, Maple可以求出它的符号解.如果你没有给初始条件,或者给的初始条什或边界条件不全,在解的公式中会带有积分常量> deq: =diff(y(x), x)*y(x)(1+x 2)=x;n:=(ny(x)y()(1+x2)dsolve(deq},{y(x)});y(a)=vIn(1+ c2), y(a)ln(1+x:2)> dsolve((y(x)2-x)*D(y)(x)+x^2-y(x)=0,{y(x)});1- y().r+oy()C1级数展开当数学问题比较复杂时,求出准确解通常是不可能的,用 serles作级数展开是有帮助的series(sin(x), x=0, 10)9+O(x5040362880例如在下列微分方程中,就是用级数方式求出的微分方程级数解>口rder:=10deq: =diff(y(x), x$2)+diff(y(x), x)+(x)=x+sin(x02v(a))+y(a)> sln1:=dsolve((deg, y(0)=0, D(y)(0)=0,y(x)1, series)3nt:y(m)=a2-1412405040x23+O(x21)20160181440第一章 Maple系统筒介Laplace和 Fourier变换Laplace变换和 Fourier变换是常用的数学变换.在 Maple中有一个积分变换的程序包inttrans提供了各种积分变换和它们的逆变换with (inttrans)s);s cos(a)+sin(a+1invlaplace(%,s, t)(a)cos(t)+sin(a)sin(tcombine(%, trig);(t-a)alias(sigma=Heaviside)f: =sigma(t+1)g: =simplify(fourier(f, t, w))I(T Dirac(an)w-Dsin(an)插值与函数拟合的像々命令可以由m个点出发计算m-1阶的插值多项式.在下例中的取值是1到10y的值是1到10之间的10个随机数f是相应的插值多项式datax:=[seq (i, i=1.10)]> data:=[seq(rand(10)(),i=1..10)]dataxy: =zip((x, y)->Lx,y], datax, datay)dater:=[1,1],②2,0],[3.7,[4,3],⑤,6],6,8,[7,5,8,8],[⑨,1,[10,9f:=interp(datax, data, x)1751711699371927323176741652577518404U3206048028801728057603240l8116483166915333602520x-2使用数值逼近程序包 numapprox中的pade命令可以计算一个给定函数的有理逼近函数以及其它类型的逼近函数with(numapprox)>x0:= solve(x^2=Pi/2)[1]T1.3 Maple的基本功能>f:=pade(tan(x^2),x=x0,[3,3])f:=(-17280m19/2√2+10800%17+43200%138-76809%13x103072%12m25/2√2-324007152V2+3840x232√2+2880%179+30729%13712+2010%2x2¥2-14100%1x2y2-1520%1m2)/(-11520丌1+1024x13-1400x9-10800)%1+(7680x23/22-115209/2v2+21600m15/2v2%12+(-7680m12+3156010+648007)%1)1:=evalf(normal(f))45329581221092-.1125313130109+10541843601093+.5353835473109x)/(2(.109716870010x2+.S958248690103-,135628886010)图形最常用的画图命令是plot和plot3d.下面的例子说明了使用在两个命令的方法>plot(sin(x)*exp(1)^(-x/7),x=0,,4*Pi);plot 3d(sin(x)exp(1)"y, x=0.. 2*Pi, y=0.. Pi, axes=boxedMaple编程Maple不仅可以对数学表达式进行计算,还可以编程.他的编程语言和其它的结构化编程语言很相似第一章 Maple系统简介f(x:: nonnegint)2 option rememberif x=0 then olif x=1 then 1else f(x-1)+f(x-2) end ifend>f(40)10233415514 Maple系统的交互使用Maple的窗口环境提供了先进的工作区界面.其护充的数学功能简明易用,用户可以在其中展现数学思想,创建复杂的技术报告,充分发挥 Maple的功能图1.1: Maple的窗凵环境B6型团囚K9 United [u]. 5e e11C wOrksheet ElementsABTAEZHIKAMint((PI/2)3in(x)+22,:NEOIPLYXΩI cor]+-plo({-1/2too8(x),x=10.,10际回四a Maple的上具条B内容工具条,它还包含一个输入和编辑文本的区域C节的头部及标题D Maple的输入,提小符为“>”,显小为红色
    2020-12-08下载
    积分:1
  • 自己做的android通讯录
    自己入门的时候做的一个通讯录,获取本地通讯录,实现了通讯录的增删改查。
    2020-12-01下载
    积分:1
  • 696516资源总数
  • 106914会员总数
  • 0今日下载