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
XMail is an Internet and intranet mail server featuring an SMTP server, POP3 server, finger server, multiple domains, no need for users to have a real system account, SMTP relay checking, RBL/RSS/ORBS/DUL and custom ( IP based and address based ) spam protection, SMTP authentication ( PLAIN LOGIN CRAM-MD5 POP3-before-SMTP and custom ), a POP3 account syncronizer with external POP3 accounts, account aliases, domain aliases, custom mail processing, direct mail files delivery, custom mail filters, mailing lists, remote administration, custom mail exchangers, logging, and multi-platform code. XMail sources compile under GNU/Linux, FreeBSD, OpenBSD, NetBSD, OSX, Solaris and NT/2K/XP.
标签： server featuring Internet intranet
上传时间： 2015-01-12
上传用户：asddsd
A client/server application that implements the game of BINGO. This example broadcasts information via a multicast socket, builds its GUI with Swing components, uses multiple synchronous threads, and communicates with RMI.
标签： application information broadcasts implements
上传时间： 2015-01-22
上传用户：二驱蚊器
This a GA implementation using binary and real coded variables. Mixed variables can be used. Constraints can also be handled. All constraints must be greater-than-equal-to type (g >= 0) and normalized (see the sample problem in prob1 in objective()).
标签： variables implementation Constra binary
上传时间： 2015-03-16
上传用户：qiao8960
The ability to create groups of reports, and grant users access to reports by group. The ability to generate reports as PDF, XLS, HTML, and CSV files. The ability to generate bar, pie and xy charts for inclusion in reports. The ability to schedule and email PDF, XLS, and CSV reports. The ability to define reusable report parameters. Available parameter types include Date, Text, and Query Parameters. The ability to create multiple DataSources for use in generating reports. Support for JNDI DataSources and internal connection pooling via Commons-DBCP is included. The ability to upload and hot deploy new reports. Web based administration of users, groups, reports, parameters, and datasources. Cross platform database support via Hibernate based persistence layer. Available in a preconfigured bundle with Apache Tomcat.
上传时间： 2014-01-14
上传用户：franktu
手机文件浏览器 Here are the sources to SMan v1.2c 1.2 is a major jump from v1.1. You will see this from the way the code has been restructured into multiple files. It also supports flip closed. However, to my chagrin, I made the mistake of assuming there will only be one flip closed view. :( That s changed in v1.3 :) 1.3 supports multiple flip closed views that can be easily added into SMan.
上传时间： 2015-03-31
上传用户：彭玖华
The purpose of this computer program is to allow the user to construct, train and test differenttypes of artificial neural networks. By implementing the concepts of templates, inheritance andderived classes from C++ object oriented programming, the necessity for declaring multiple largestructures and duplicate attributes is reduced. Utilizing dynamic binding and memory allocationafforded by C++, the user can choose to develop four separate types of neural networks:
标签： differenttype construct computer purpose
上传时间： 2013-12-06
上传用户：13517191407
This a simple genetic algorithm implementation where the evaluation function takes positive values only and the fitness of an individual is the same as the value of the objective function
标签： implementation evaluation algorithm function
上传时间： 2015-04-12
上传用户：klin3139
PrintNow is a 32-bit application that runs only under Windows 95 or Windows NT 4.0. It allows your PrtScr and Alt+PrtScr keys to print a screen capture directly to your printer instead of just copying the image to the Windows clipboard. PrintNow can also print any DIB image in the clipboard, regardless of its original source. PrintNow supports multiple instances, it can print multiple copies of a screen capture to the same printer with different print settings, to several different printers, or any combination thereof, with a single keystroke.
标签： Windows application PrintNow allows
上传时间： 2015-04-27
上传用户：zhanditian
很好的linux内核调试软件 兼辕马，没有密码。 The ia64 and ix86 directories contain versions of kdb prior to v2.0 (kdb version v2.0, not the kernel version). Older versions of kdb had complete patches for each architecture it supported, each patch included all the common kdb code. This format was awkward to maintain and use for multiple platforms. Starting with kdb v2.0 there is a common patch against each kernel which contains all the architecture independent code plus separate architecture dependent patches. Either use an old style (v1.8 or v1.9) kdb patch or use a new style (v2.0) common patch plus the corresponding architecture dependent patch.
上传时间： 2014-01-21
上传用户：wyc199288
