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跳频扩频通信系统的Matlab防真和分析
跳频扩频通信系统的Matlab防真和分析
- 2020-11-30下载
- 积分：1
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ubuntu四本
ubuntu四本：ubuntu部落 ubuntu标准教程 ubuntu从入门到精通 ubuntu官方指南
- 2021-05-07下载
- 积分：1
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MSP430的SCH和PCB库文件
一直以来MSP430没有一个比较好的SCH和PCB库文件，给MSP430爱好者特别是初学者带来诸多不便，为了改变这种状况，本人花了两个晚上的时间，将MSP430 SCH和PCB库文件整理出来了，将此库文件上传同大家分享。
- 2020-11-29下载
- 积分：1
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用单片机设计的测速表源程序
【实例简介】
- 2021-10-01 00:31:05下载
- 积分：1
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英飞凌IGBT驱动培训资料
在电力电子装置中的一个重要组成部分,输入连接到控制电路的PWM信号输出端，输出连接到装置各IGBT的门极和发射极，将装置中的控制电路产生的数字PWM信号进行隔离传输和电平转换和功率放大,实现控制电路对IGBT进行开通和关断动作的控制，从而实现装置的功率变换功能。InfineontechnologiesIGBT Gate Drive: Power Suppliesa Gate driving voltage for IGBT+15Vturn-on is normally +15VDriver>□1a Gate driving voltage for IGBTOVturn-off can be oV or negativeWith Single Power Supply5V to-15V)a Negative gate driving voltage+15Vhelps IGBt switch off fasterremain in off state but itDriverneeds dual power suppliesOVWhether to use oV or negativegate driving voltage depends15VWith Dual Power Supplieson the requirement on costZH Liang - Al APperformance05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: InterfaceOpto-couplers is commonly used as interfacingdevices for applications where both signaltransmission and potential isolation are requiredOpto-couplers offers reliable isolation between IGBT(high-potential)& micro-controller(low-potential)Opto-couplers has long signal delay(us)and isexpensiveIsolation +VDpCCMicroDrivercontrollerZH Liang - Al AP05Dec2003Page 6for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveStandard configuration: 2 drivers, 2 power supplies, 2 opto-couplersAdvantages: standard, reliableDisadvantages: using opto-couplers, higher system costIsolation +VDDlCC1DriverCC1MicrocontrollerDD2+VCC2DriverCC2ZH Liang - Al AP05Dec2003Page 7for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveIn half-bridge IGBT drive, opto-couplers offer two functions(1)safety isolation &(2) shifting the potential of the gatesignal from uc potential to high-side potentialIf safety isolation between IGBT& micro-controller is notneeded, then"Level Shift" can replace opto-coupling andrealize function(2)OptoHigh-sideHigh-sidecouplerDriverIGBTMicro-Opto-LoW-sideLow-sidecontrollercouplerDriverIGBTZH Liang - Al AP05Dec2003Page 8for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive Level shiftI FeaturesHVc(600V/1200V)沿PULSERFILTERShort Signal DelayPULSE■Cost- effectiveGEN■ No Safety Isolationevel Shift Half-bridge DriverI BenefitHigh-side““°IGBTO Saving Opto-couplersLevel(lower system costShiftMicro● Wider range ofcontrollerLevelLow-side■■■■■直■口m留■Switching FrequencyShiftIGBT(higher flexibility)ZH Liang - Al AP05Dec2003Page 9for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: CLTNEWO CLT-Coreless Transformer (for signal transmissionu Coils(Primary Secondary Side)realized on SiliconO Short Signal Delay (allowing high or low switching frequencyu Lower Cost(compared to 1200V level-shift driver日 Safety IsolationCLT Half-bridge DriverHigh-sideCLT Single DriverIGBTCLTMicro-controllerCLTIGBTMicro-controllerLoW-sideIGBTZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strapBoot-strap circuit includes only a diode and a capacitora In half-bridge drive, the boot-strap circuit can replace the high-sidepower supply and make single-supply operation possibleWhen the low-side IGBT (or FWD)is on, the diode is forwardbiased and the capacitor is charged by the low-side power supplyvia the low-side IGBT and stores the energyWhen the low-side IGBt(and FWD)is OFF, the diode is reversebiased and blocks the dc-bus voltage to protect the low-sidecircuit. Meanwhile, the capacitor supplies energy to the high-sidedriverThe boot-strap capacitance should be high enough to keep thesupply voltage stable Capacitance needed can be calculatedbased on the working conditions and device parametersZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strap circuitConventional2心菲*|■3 high-side power supplies■1|oW- side power supplyUsing boot-strap circuit心体心心●3 diodes& capacitorso 1 low-side power supplyFeaturesa Diode: ultra-fast recoverya Capacitor: general-purposed ITAa Dependent on low-side IGBTBenefitsSaving 3 PS(transformer cost)22ZH Liang - Al AP05Dec2003Reducing wiring connectionPage 12for internal use onlyInfineon Technologies Asia Pacific
- 2020-12-11下载
- 积分：1
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气体扩散模型模拟程序
放射性气体发生泄漏事故,可能对附近居民和环境造成极大的危害。气体物质一旦发生泄漏,很难将其限定在一定范围内,势必造成大面积的危害。所以预测气体在某点出的浓度对居名是很重要的，它能有效的对不必要的事故进行防范、预测，挽回损失。此论文对事故进行了数学建模，并用程序(java代码实现)实现了仿真
- 2020-12-05下载
- 积分：1
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数字信号处理C语言程序集（DSP算法大全C语言版本446页）
除掉封面，共446页，只有5.39M,但内容是最全面的，质量上也是非常清晰的。是学dsp算法的绝佳书籍，没有华丽的数学推导，简单明了，名曰数字信号处理C语言程序集，民间又称DSP算法大全C语言版本。第六章FIR数字滤波器的设计F■尋■■b■晷↓國■看↓■↓b日↓bb↓●■■22786.1窗函数方法…22?§6.2域最小误差平方设计.……238§6.3切比雪夫逼近方法…………42第三篇随机数字信号处理第一章经典谱佔计……6§11功率谱估计的周期图方法…····““甲早争·道者自自.264§1.2功率谱估计的相关方法T■冒■■■■■『曾■■詈『國昏日■■哥■订d·聊聊b■山如↓h“◆白ψp4q第二章现代谱估计………………………26821求解一般托布利兹方程组的莱文森算法■■■昏■■1冒■■看嚼司聊國司冒D■180§22求解对称正定方程组的乔里斯基算法q■ψ鲁鲁曾◆◆曾自自4鲁唱音昏鲁自■Z83§23求解尤利沃克广程的菜文森德宾算法…°P甲自287§2.4计算ARMA模型的功率谱密度§2.5尤利沃克谱佔计算法………………………………………292A2.6协力差谱估计算法…1亡■曾■■目■鲁會曾罪司罪鲁·命讠咖D■■■■b啁§2.7 Burg谱佔计算法……1■●33§2.8最大似然谱估计算法第三章时频分析·聊·即·D●b·■唱鲁·◆■申曾阜曾q俨俨■■中個◆314§3.1维格纳( Wigner)分布·“314§32离散小波变换r""t31第四章随机信号的数字滤波也“命甲甲即甲330§41维纳( Wiener)数字滤波330§4,2卡尔曼( Kalman)数宇滤波.吾小如山山甲·自甲§43最小均方(LMS)自适应数字滤波"…"…"∵"卜"r""r"s""341§4-4归一化LMS自适应数字滤波…………344§4.5递推最小二乘(RLS)自适应数字濃泼导↓↓晶3L8第四篇数字图像处理第一章图像雄本运算■■↓罪隱b■【b啁山b西血a导即·晶s咱■聊暴,M352§1.1图像读取、存储与显示…第一篇常用数字信号的产生第一章数字信号的产生§1.1均匀分布的随机数功能产生(a,b)区间上均匀分布的随机数。方法简介均匀分布的概率密度函数为f(r)共它2,方差为Qb通常用U(a,b)表示。均匀分布的均值为+b产生均匀分布随机数的方法下首先,由给定的初值x,用混合同余法a=(ai-1+c)(mod M)产生(,1)区间上的随机数y其中:a-2045,c=1,M=22;然后,通过变换x,=a(ba)y;产生{a,b)区间上的随机数z;三、使用说明1.子函数语句double urniform (a, b, seed>2.形参说明a——双精度实型变量。给定区间的下限。b—双糖度实型变量。给定区间的上限。seed-—长整型指针变量。*seed为随机数的种子。四、子函数程序(文件名: uniform.c)Double uniform (a, b, seed)double a, bilong int的sced;QubIc￥seed=2045兴(#seed)+1ccd=.Scd一(;gced/lC48576)两L18576t=(兴seed)/1048576.0;t=+a)苦trefute〔五、例题产生50个0到1之问均匀分布的随机数主函数程序(文件名: uniform.r):# inelude" stdio.h′include furiomaini)doble a,b,x; int i+Jg intdouble unifo r(double, double, long int xa=0.0;h=1.0;=13?9for(i=0
- 2020-07-02下载
- 积分：1
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GPS L1C信号捕获
描述GPS L1C的信号结构和捕获方法现代化GPS信号捕获GPS信号同步
- 2020-11-05下载
- 积分：1
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非线性有限元及程序（凌道盛/徐兴）
非线性有限元及程序,作者:凌道盛/徐兴, 《非线性有限元及程序》内容包括非线性有限单元法的基础知识、主要算法、软件工程的基本思想、非线性有限元程序vfeap和工程算例等
- 2020-12-01下载
- 积分：1
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非线性滤波理论与目标跟踪应用
非线性滤波理论与目标跟踪应用非线性滤波理论与目标跟踪应用
- 2021-05-07下载
- 积分：1
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