something useful for communication,source code based on FPGA
标签： communication something useful source
上传时间： 2013-08-31
上传用户：maizezhen
On the design of an FPGA-Based OFDM modulator for IEEE 802.11a
标签： FPGA-Based modulator 802.11 design
上传时间： 2013-09-02
上传用户：zjwangyichao
为了解决磁放大器性能测试过程中，需要对其供给不同数值恒定电流的问题，设计了一种基于DAC7512和单片机的数控恒流源系统。该系统采用AT89C51作为主控器件，将计算机发送的电流控制字命令转换为D/A转换器控制字，通过模拟SPI通信接口，写D/A控制字到DAC7512，从而控制其输出相应数字电压值，经差动缩放电路、电压/电路变换电路和功率驱动电路，最后输出恒定电流。实验结果表明，恒流源输出电流调节范围为-45~+45 mA、精度为±0.1 mA，分辨率达0.024 4 mA，具有应用灵活，外围电路简单，可靠性高的特点。该数控直流恒流源也可为相关产品的测试系统研发提供参考。 Abstract: In order to solve the need to supply different values constant current for the magnetic amplifier in testing process， numerical control constant current source system was designed based on DAC7512 chip and microcontroller technology. The system used the AT89C51 as the main chip， which can convert the current control word from computer into to D/A control words. And the system wrote D/A control word into the DAC7512 chip to control the output voltage value by the SPI communication interface， which can output corresponding constant current figures by scaling circuit， the V/I converter and power drive circuit. Experimental results show that the current source output current adjustment range is -45~+45mA， accuracy is ± 0.1mA， and resolution ratio is 0.024 4mA
上传时间： 2014-12-27
上传用户：invtnewer
基于通用集成运算放大器，利用MASON公式设计了一个多功能二阶通用滤波器，能同时或分别实现低通、高通和带通滤波，也能设计成一个正交振荡器。电路的极点频率和品质因数能够独立、精确地调节。电路使用4个集成运放、2个电容和11个电阻，所有集成运放的反相端虚地。利用计算机仿真电路的通用滤波功能、极点频率和品质因数的独立控制和正交正弦振荡，从而证明该滤波器正确有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the result shows that the presented circuit is valid and effective.
上传时间： 2013-10-09
上传用户：13788529953
TheTool is highy customizable map editor(based on QT) which can be extended via LUA scripts. A first implentation is ready and can be published to the public. The editor is the perfect tool who wants to design some 3d games but don t have time to write
标签： customizable extended TheTool scripts
上传时间： 2013-12-12
上传用户：lanwei
This article is based in part on Bob Place s ADO is AOK (a simple ADO tutorial). Wrapper Usage This is consist of 2 classes. CDyndb : This Class manages connections and recordsets. Recordsets are organized as linked list (CList) and you can access them using their ids. CDynRec : This class is the node to populate for each recordsets. ADO封装器类 这篇文章一部分基于Bob Place的《ADO is AOK》 (简单的ADO指导) 。 包裹的用法 由2个类组成。 类CDyndb: 这个类别管理连接和记录集。记录集是连接起来的记录的集合，你可以通过他们的ID访问他们。 类CDynRec: 这个类别存放记录集的代码。
上传时间： 2013-12-14
上传用户：wfl_yy
Mantis an easily deployable, web based bugtracker to aid product bug tracking. It requires PHP, MySQL and a web server. It is simpler than Bugzilla and easily editable. Check out the online Demo.
标签： deployable bugtracker requires tracking
上传时间： 2014-01-25
上传用户：小宝爱考拉
This version of dialog, formerly known as cdialog is based on the Debian package for dialog 0.9a (see CHANGES for recent modifications) 这是一个 unix 系统下的对话框管理程序， 你可以将该程序编译后，直接使用。
标签： dialog formerly version cdialog
上传时间： 2013-12-09
上传用户：playboys0
linux client/server based LCD Driver for HD44780
标签： client Driver server linux
上传时间： 2014-12-04
上传用户：kbnswdifs
Unique net-enabled GUI system based state of the art coding solutions with strong XML support.
标签： net-enabled solutions support Unique
上传时间： 2013-12-24
上传用户：1101055045
