erwin是一个数据库关系实体模型（er Model）设计工具，与Power Designer（Sybase公司开发）成为最常用的两种数据库设计工具。目前该工具被CA收购，成为CA数据库解决方案中的一个关键部分。与微软的Vision相比，erwin只能设计er model，而且设计界面选项较多，相对来说并不那么友好，增加了使用的难度
上传时间： 2017-03-19
上传用户：二驱蚊器
C++ XML is a book exclusively devoted to the pow er and complexities of integrating XML standards into C++. As a developer,this is a book you cannot miss. C++ XML addresses all major standards,toolkits,and types of applications dealing with XML as a format for representing and exchanging data,as well as XML behavior,from a C++ standpoint. It explains the implementation of applications and reusuable frameworks for all major XML purposes exclusively using C/C++ parsers and toolkits, such as expat,Xerces,Xalan,libxml2,and Microsoft’s MSXML.
标签： complexities exclusively integrating XML
上传时间： 2014-03-11
上传用户：zhaiyanzhong
图书管理系统数据库设计－包含er图 是自己原来课程设计做的
上传时间： 2014-01-23
上传用户：x4587
成绩管理系统的er图，用于数据库系统设计
标签： 管理系统
上传时间： 2017-09-24
上传用户：大三三
H3C er G2系列高性能企业级路由器 快速入门-6PW108-整本手册
标签： H3C 6PW 108 er 性能 企业级 快速入门 路由器 手册
上传时间： 2020-09-26
上传用户：
·注：以下资料由深圳英贝德公司提供。仅供学习参考。不要用作商业用途。我们不销售这块板，想购买的可以直接联系深圳英贝德公司。 该板的功能比较丰富，带USB与CAN功能。 配有一只简易JTAG仿真器。电路图： 开发板的电路图（Protel格式及PDF格式） 简易JTAG电路图 本开发板涉及的IC的数据手册：包括： at24c08.pdf AT91SAM7s64 er
上传时间： 2013-05-21
上传用户：cc111
·注：以下资料由深圳英贝德公司提供。仅供学习参考。不要用作商业用途。我们不销售这块板，想购买的可以直接联系深圳英贝德公司。 该板的功能比较丰富，带USB与CAN功能。 配有一只简易JTAG仿真器。电路图： 开发板的电路图（Protel格式及PDF格式） 简易JTAG电路图 本开发板涉及的IC的数据手册：包括： at24c08.pdf AT91SAM7s64 er
上传时间： 2013-06-16
上传用户：时代将军
Photodiodes can be broken into two categories: largearea photodiodes with their attendant high capacitance(30pF to 3000pF) and smaller area photodiodes withrelatively low capacitance (10pF or less). For optimalsignal-to-noise performance, a transimpedance amplifi erconsisting of an inverting op amp and a feedback resistoris most commonly used to convert the photodiode currentinto voltage. In low noise amplifi er design, large areaphotodiode amplifi ers require more attention to reducingop amp input voltage noise, while small area photodiodeamplifi ers require more attention to reducing op amp inputcurrent noise and parasitic capacitances.
上传时间： 2013-10-28
上传用户：hanbeidang
A fully differential amplifi er is often used to converta single-ended signal to a differential signal, a designwhich requires three signifi cant considerations: theimpedance of the single-ended source must match thesingle-ended impedance of the differential amplifi er,the amplifi er’s inputs must remain within the commonmode voltage limits and the input signal must be levelshifted to a signal that is centered at the desired outputcommon mode voltage.
上传时间： 2013-11-09
上传用户：wweqas
Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage, most of the amplifi er designshave incorporated differential inputs and outputs to regainand maximize total output signal swing. Since many lowvoltageapplications are single-ended, the questions arise,“How can I use a differential I/O amplifi er in a single-endedapplication?” and “What are the implications of suchuse?” This Design Note addresses some of the practicalimplications and demonstrates specifi c single-endedapplications using the 3GHz gain-bandwidth LTC6406differential I/O amplifi er.
上传时间： 2013-11-23
上传用户：rocketrevenge
