The AN10 begins with a survey of methods for measuring op amp settling time. This commentary develops into circuits for measuring settling time to 0.0005%. Construction details and Results are presented. Appended sections cover oscilloscope overload limitations and amplifier frequency compensation.
上传时间： 2013-11-14
上传用户：JIMMYCB001
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
PhpDig is a search engine written in PHP that uses a MySQL database backend. It features indexing of both static and dynamic pages, spidering of almost all links in HTML content, in hrefs, areamaps, and frames, and full text indexing. The search Results appearence is skin-able, using a very simple templates system. PhpDig是一个用PHP编写的搜索引擎，它使用MySQL数据库后台。它的功能有静态和动态页面索引，在HTML内容中用hrefs, areamaps，和frames以及全文本索引构成所有的链接网。搜索结果的外观是可定制外观的，使用一个非常简单的模板系统。
标签： database features indexing backend
上传时间： 2014-01-03
上传用户：haohaoxuexi
基于STRUTS的网络调查应用，支持单选，多选，图形等多种样式问答。 Web based test / exam system, supports profiles, groups and categories. Questions with one or more correct answers, open answers. Graphical Results. Struts, J2EE, MVC.
上传时间： 2015-04-07
上传用户：Ants
Facilitating entry into drug treatment among injection drug users referred from a needle exchange program_ Results from a community-based behavioral intervention trial.rar
标签： drug Facilitating injection treatment
上传时间： 2013-12-21
上传用户：jing911003
The tar file contains the following files: ptfsf.c: heart of the perfect TFSF code ptfsf.h: header file for same ptfsf-demo.c: FDTD code which demonstrates use of perfect TFSF code. Essentially this program used to generate Results shown in the paper ptfsf-file-maker.c: code to generate an incident-field file using the "perfect" incident fields ptfsf-demo-file.c: FDTD code which uses the perfect incident fields stored in a file fdtdgen.h: defines macros used in much of my code Makefile: simple make-file to compile programs Also include are some simple script files to run the programs with reasonable values. The code assumes a two-dimensional computational domain with TMz polarization (i.e., non-zero field Ez, Hx, and Hy). The program is currently written so that the incident field always strikes the lower-left corner of the total-field region first. (If you want a different corner, that should be a fairly simple tweak to the code, but for now you ll have to make that tweak yourself.)
标签： ptfsf following the contains
上传时间： 2013-11-28
上传用户：风之骄子
Delineate is a tool for converting bitmap raster images to SVG (Scalable Vector Graphics) using AutoTrace or potrace. It displays SVG Results using Apache Batik. Input formats are JPEG, PNG, GIF, BMP, TIFF, PNM, PBM, PGM, PPM, IFF,PCD, PSD, RAS.
标签： converting Delineate Graphics Scalable
上传时间： 2014-01-19
上传用户：四只眼
UWB 功率控制 容量 Main Matlab script is in runsim.m. It generates random topologies, optimizes, and display Results. IMPORTANT: you may need to add manually the lib path in Matlab in order to get all the necessary functions. Reference: Radunovic, Le Boudec, "Joint Power Control, Scheduling and Routing in UWB networks"
标签： topologies generates optimizes Matlab
上传时间： 2015-08-14
上传用户：shanml
CCALC provides convenient way to for performing calculations. You can use standard infix notation for expressions and store Results in variables.
标签： calculations convenient performing provides
上传时间： 2015-08-18
上传用户：dave520l
The cable compensation system is an experiment system that performs simulations of partial or microgravity environments on earth. It is a highly nonlinear and complex system.In this paper, a network based on the theory of the Fuzzy Cerebellum Model Articulation Controller(FCMAC) is proposed to control this cable compensation system. In FCMAC ,without appropriate learning rate, the control system based on FCMAC will become unstable or its convergence speed will become slow.In order to guarantee the convergence of tracking error, we present a new kind of optimization based on adaptive GA for selecting learning rate.Furthermore, this approach is evaluated and its performance is discussed.The simulation Results shows that performance of the FCMAC based the proposed method is stable and more effective.
标签： system compensation simulations experiment
上传时间： 2015-08-26
上传用户：希酱大魔王
