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  • 運算放大器穩定時間的測量

    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.

    標簽: 運算放大器 穩定時間 測量

    上傳時間: 2013-11-14

    上傳用戶:JIMMYCB001

  • 基于Multisim 10的矩形波信號發生器仿真與實現

    在Multisim 10軟件環境下,設計一種由運算放大器構成的精確可控矩形波信號發生器,結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節,通過多路開關投入不同數值的電容實現了頻段的調節,通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力,可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明,電路性能指標達到了設計要求。 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.

    標簽: Multisim 矩形波 信號發生器 仿真

    上傳時間: 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

    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是一個用PHP編寫的搜索引擎,它使用MySQL數據庫后臺。它的功能有靜態和動態頁面索引,在HTML內容中用hrefs, areamaps,和frames以及全文本索引構成所有的鏈接網。搜索結果的外觀是可定制外觀的,使用一個非常簡單的模板系統。

    標簽: database features indexing backend

    上傳時間: 2014-01-03

    上傳用戶:haohaoxuexi

  • 基于STRUTS的網絡調查應用

    基于STRUTS的網絡調查應用,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.

    標簽: STRUTS 網絡

    上傳時間: 2015-04-07

    上傳用戶:Ants

  • Facilitating entry into drug treatment among injection drug users referred from a needle exchange pr

    Facilitating entry into drug treatment among injection drug users referred from a needle exchange program_ Results from a community-based behavioral intervention trial.rar

    標簽: drug Facilitating injection treatment

    上傳時間: 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: he

    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.)

    標簽: ptfsf following the contains

    上傳時間: 2013-11-28

    上傳用戶:風之驕子

  • Delineate is a tool for converting bitmap raster images to SVG (Scalable Vector Graphics) using Auto

    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.

    標簽: converting Delineate Graphics Scalable

    上傳時間: 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 d

    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"

    標簽: topologies generates optimizes Matlab

    上傳時間: 2015-08-14

    上傳用戶:shanml

  • CCALC provides convenient way to for performing calculations. You can use standard infix notation f

    CCALC provides convenient way to for performing calculations. You can use standard infix notation for expressions and store Results in variables.

    標簽: calculations convenient performing provides

    上傳時間: 2015-08-18

    上傳用戶:dave520l

  • The cable compensation system is an experiment system that performs simulations of partial or microg

    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.

    標簽: system compensation simulations experiment

    上傳時間: 2015-08-26

    上傳用戶:希醬大魔王

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