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.
標(biāo)簽： 運(yùn)算放大器 穩(wěn)定時(shí)間 測量
上傳時(shí)間： 2013-11-14
上傳用戶：JIMMYCB001
在Multisim 10軟件環(huán)境下，設(shè)計(jì)一種由運(yùn)算放大器構(gòu)成的精確可控矩形波信號發(fā)生器，結(jié)合系統(tǒng)電路原理圖重點(diǎn)闡述了各參數(shù)指標(biāo)的實(shí)現(xiàn)與測試方法。通過改變RC電路的電容充、放電路徑和時(shí)間常數(shù)實(shí)現(xiàn)了占空比和頻率的調(diào)節(jié)，通過多路開關(guān)投入不同數(shù)值的電容實(shí)現(xiàn)了頻段的調(diào)節(jié)，通過電壓取樣和同相放大電路實(shí)現(xiàn)了輸出電壓幅值的調(diào)節(jié)并提高了電路的帶負(fù)載能力，可作為頻率和幅值可調(diào)的方波信號發(fā)生器。Multisim 10仿真分析及應(yīng)用電路測試結(jié)果表明，電路性能指標(biāo)達(dá)到了設(shè)計(jì)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.
標(biāo)簽： Multisim 矩形波 信號發(fā)生器 仿真
上傳時(shí)間： 2014-01-21
上傳用戶：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是一個(gè)用PHP編寫的搜索引擎，它使用MySQL數(shù)據(jù)庫后臺。它的功能有靜態(tài)和動態(tài)頁面索引，在HTML內(nèi)容中用hrefs, areamaps，和frames以及全文本索引構(gòu)成所有的鏈接網(wǎng)。搜索結(jié)果的外觀是可定制外觀的，使用一個(gè)非常簡單的模板系統(tǒng)。
標(biāo)簽： database features indexing backend
上傳時(shí)間： 2014-01-03
上傳用戶：haohaoxuexi
基于STRUTS的網(wǎng)絡(luò)調(diào)查應(yīng)用，支持單選，多選，圖形等多種樣式問答。 Web based test / exam system, supports profiles, groups and categories. Questions with one or more correct answers, open answers. Graphical Results. Struts, J2EE, MVC.
標(biāo)簽： STRUTS 網(wǎng)絡(luò)
上傳時(shí)間： 2015-04-07
上傳用戶：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
標(biāo)簽： drug Facilitating injection treatment
上傳時(shí)間： 2013-12-21
上傳用戶：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.)
標(biāo)簽： ptfsf following the contains
上傳時(shí)間： 2013-11-28
上傳用戶：風(fēng)之驕子
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.
標(biāo)簽： converting Delineate Graphics Scalable
上傳時(shí)間： 2014-01-19
上傳用戶：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"
標(biāo)簽： topologies generates optimizes Matlab
上傳時(shí)間： 2015-08-14
上傳用戶：shanml
CCALC provides convenient way to for performing calculations. You can use standard infix notation for expressions and store Results in variables.
標(biāo)簽： calculations convenient performing provides
上傳時(shí)間： 2015-08-18
上傳用戶：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.
標(biāo)簽： system compensation simulations experiment
上傳時(shí)間： 2015-08-26
上傳用戶：希醬大魔王
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