在Multisim 10软件环境下，设计一种由运算放大器构成的精确可控矩形波信号发生器，结合系统电路原理图重点阐述了各参数指标的实现与测试方法。通过改变RC电路的电容充、放电路径和时间常数实现了占空比和频率的调节，通过多路开关投入不同数值的电容实现了频段的调节，通过电压取样和同相放大电路实现了输出电压幅值的调节并提高了电路的带负载能力，可作为频率和幅值可调的方波信号发生器。Multisim 10仿真分析及应用电路测试结果表明，电路性能指标达到了设计要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors Provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上传时间： 2014-01-21
上传用户：shen007yue
Abstract: How can an interface change a happy face to a sad face? Engineers have happy faces when an interface works properly.Sad faces indicate failure somewhere. Because interfaces between microprocessors and ICs are simple—even easy—they are oftenignored until interface failure causes sad faces all around. In this article, we discuss a common SPI error that can be almostimpossible to find in a large system. Links to interface tutorial information are Provided for complete information. Noise as a systemissue and ICs to minimize its effects are also described.
上传时间： 2013-11-18
上传用户：zgz317
Setting up an ADOCE project using Visual C++ 6.0 is rather simple. Assuming that you have downloaded and installed the ADOCE SDK from Microsoft, you are ready to use it in your Windows CE Database applications. The sample that I have Provided is a *very* simple one illustrating how to instantiate the proper COM objects, and the basics of how to interface with them (in a very simple example)
标签： downloaded Assuming Setting project
上传时间： 2015-01-16
上传用户：阳光少年2016
工具分类：攻击程序 运行平台：Windows 工具大小：7577 Bytes 文件MD5 ：28f6d5f4d818438522a3d0dc8a3fa46b 工具来源：securiteam.com // GDI+ buffer overrun exploit by FoToZ // NB: the headers here are only sample headers taken from a .JPG file, // with the FF FE 00 01 inserted in header1. // Sample shellcode is Provided // You can put approx. 2500 bytes of shellcode...who needs that much anyway // Tested on an unpatched WinXP SP1
标签： 818438522a d818438522 securiteam 818438522
上传时间： 2015-01-20
上传用户：Late_Li
SPLASH is a c++ class library that implements many of the Perl constructs and data types, including extensive regex regular expression pattern matching. For those not familiar with Perl, it is an excellent scripting language by Larry Wall and is available for most platforms. This Class library provides List, String, Regular Expression, and text manipulation handling capabilities based on those Provided in Perl
标签： implements constructs including library
上传时间： 2013-12-07
上传用户：1583060504
UnZip is a small zipfile extract utility. It is written to be assmall portable as possible and is intended to be starting point for im-plementation of .ZIP files in non-IBM environments.Source code is Provided in C and Turbo Pascal. If you port this programto a non-IBM system, I would appreciate a copy of the ported source andexe files.
标签： is portable possible extract
上传时间： 2014-01-20
上传用户：维子哥哥
Client/Server版本 DBISAM compiles directly into your application with no external libraries required. Runtime package support is also Provided if so desired. It has a very small footprint and does not require any forms support in Delphi 6, C++Builder 6, and Kylix 2 and higher, which helps keep the size of non-UI applications like services or web applications to a minimum.
标签： application libraries compiles directly
上传时间： 2015-04-04
上传用户：sz_hjbf
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ** RELEASE NOTES *** *** *** *** ***** *** *** *** *** *** *** *** *** *** *** *** *** *** 1) RELEASE NOTES: --- --- ---- The release notes are now Provided in PDF format in the file: \SOFTWARE\uCOS-II\DOC\RelV251.PDF 2) FEATURES SINCE V2.00: --- --- --- ----- All the features added since V2.00 are described in the PDF file: \SOFTWARE\uCOS-II\DOC\NewV251.PDF 3) EVENT FLAGS: -------------- Event Flags are discussed in AN-1007 (see www.Micrium.com/app_notes.htm) 4) QUICK REFERENCE CHART: ------------------------ A Quick Reference Chart for all the functions in V2.51 is Provided in the following .PDF files: \SOFTWARE\uCOS-II\DOC\QuickRefChartV251-Color.PDF Once printed, simply FOLD the page in half and if you have a LAMINATION machine, you can protect the chart by laminating it.
上传时间： 2015-04-06
上传用户：zq70996813
Free C++ toolkit to facilitate Monte-Carlo simulation. This is a library covered under the LGPL. "MCS-libre" stands for "Monte Carlo Simulation - libre". Documentation and examples are Provided. 这是一个免费的用于简化Monte-Carlo模拟的C++工具包。这是一个遵守LGPL协议的库。"MCS-libre"代表"Monte Carlo Simulation - libre"。提供了文档和例子。
标签： Monte-Carlo facilitate simulation toolkit
上传时间： 2013-12-06
上传用户：671145514
This document can be considered as a supplement to the already existing Application note AN10302 “Using the Philips LPC2000 Flash Utility”, which is Provided in the same zip file. The Application note covers the following topics:
标签： Application considered supplement document
上传时间： 2015-04-18
上传用户：waizhang
