在需要硬件实现对数运算的场合,其精度和速度是必须考虑的问题。目前硬件实现对数变换的方法主要有查表法、泰勒公式展开法和线性近似法。查表法所需要的存储单元随着精度的增加或输入值范围的增大而成指数增加;泰勒公式展开法需要乘法器,面积大不易实现;线性近似法的精度有限,且需要误差校正电路,实现较难。
上传时间: 2016-05-24
上传用户:niepan100
通过构造基于0FDM技术的基带无线通信系统的仿真模型,研究了0FDM技术在瑞利多径衰落信道下的性能。仿真结果表明采用OFDM技术在瑞利多径衰落信道下具有良好的抗多径干扰的性能,插入合适的循环前缀(保护间隔)有效地减少了系统的符号间干扰。今后可进一步加入RF调制解调的仿真,研究频偏对0FDM子载波之间干扰的影响。
上传时间: 2016-06-05
上传用户:mengmeng
本手册介绍了TVF8000系列变频器的正确安装方法、参数设定、操作指南以及起动、运行、保护及故障诊断等有关内容。在使用TVF8000系列变频器之前请仔细阅读本手册,理解各项内容,以便能正确使用。
上传时间: 2016-06-19
上传用户:liyoukeji
32feet.NET is a shared-source project to make personal area networking technologies such as Bluetooth, Infrared (IrDA) and more, easily accessible from .NET code. Supports desktop, mobile or embedded systems. 32feet.NET is free for commercial or non-commercial use. If you use the binaries you can just use the library as-is, if you make modifications to the source you need to include the 32feet.NET License.txt document and ensure the file headers are not modified/removed. The project currently consists of the following libraries:- Bluetooth IrDA Object Exchange Bluetooth support requires a device with either the Microsoft, Widcomm, BlueSoleil, or Stonestreet One Bluetopia Bluetooth stack. Requires .NET Compact Framework v3.5 or above and Windows CE.NET 4.2 or above, or .NET Framework v3.5 for desktop Windows XP, Vista, 7 and 8. A subset of functionality is available for Windows Phone 8 and Windows Embedded Handheld 8 in the InTheHand.Phone.Bluetooth.dll library.
上传时间: 2016-07-06
上传用户:magister2016
Microprocessors are getting smaller, cheaper and faster. Every day, it is easier to embed more functionality into a smaller space. Embedded processors have become pervasive, and as time goes on, more and more functions that were once implemented with analog circuitry or with electromechanical assemblies are being realized with microcontrollers, ADCs and DACs. Many of these assemblies that are being supplanted by the microprocessor are controlling dynamic processes, which is a good thing, because the microprocessor coupled with the right software is often the superior device.
上传时间: 2016-07-20
上传用户:kunger
数电课程设计 multisim 武汉理工大学 八位数字抢答器 最后完全版 1. 抢答器同时供8名选手或8个代表队比赛,分别用8个按钮S0 ~ S7表示。 2. 设置一个系统清除和抢答控制开关S,该开关由主持人控制。 3. 抢答器具有锁存与显示功能。即选手按动按钮,锁存相应的编号,并在优先抢答选手 的编号一直保持到主持人将系统清除为止。 4. 抢答器具有定时抢答功能,且一次抢答的时间由主持人设定(如,30秒)。当主持人启 动"开始"键后,定时器进行减计时。 5. 参赛选手在设定的时间内进行抢答,抢答有效,定时器停止工作,显示器上显示选手 的编号和抢答的时间,并保持到主持人将系统清除为止。 6. 如果定时时间已到,无人抢答,本次抢答无效,系统通过一个指示灯报警并禁止抢答, 定时显示器上显示00。
上传时间: 2016-11-23
上传用户:BertCC
Connecting 32-bit controlled applications in the industrial, commercial and consumer markets is fast becoming a necessity rather than an option. Many new applications, such as remote data collection, home automation and networked appliances, require secure, high-performance connectivity at an economical price. Freescale Semiconductor gives design engineers the flexibility to choose the right 32-bit microcontroller from a broad portfolio of ColdFire® embedded controllers.
上传时间: 2017-02-18
上传用户:traff07
符合《汽车动力蓄电池行业规范条件》企业目录(第四批) 电池技术目录,第1-4批
上传时间: 2017-03-07
上传用户:cszgame
选择文件 X 无刷直流电动机Matlab仿真建模及模型中S函数
标签: Matlab 无刷直流电动机 仿真建模 S函数 模型 编写
上传时间: 2017-03-13
上传用户:Lincy
TDA2030是音频功放电路,采用V型5脚单列直插式塑料封装结构。如图1所示,按引脚的形状引可分为H型和V型。该集成电路广泛应用于汽车立体声收录音机、中功率音响设备,具有体积小、输出功率大、失真小等特点。并具有内部保护电路。
标签: 模拟功放
上传时间: 2017-11-27
上传用户:linxiaoyi