摘 要:用一種新的思路和方法,先計算低通、再計算高通濾波器的有關參數,然后組合成帶通濾波器.關鍵詞:濾波器;參數;新思路中圖分類號: TN713. 5 文獻識別碼:B 文章編號:1008 - 1666 (1999) 04 - 0089 - 03A New Consideration of the Band Filter’s CalculationGuo Wencheng( S hao Yang B usiness and Technology school , S haoyang , Hunan ,422000 )Abstract :This essay deals with a new method of calculating the band filters - first calculatingthe relevant parameters of low - pass filters ,then calculating the ones of high - pass filters.Key words :filter ; parameters ;new considercation八十年代后,信息產業得到了迅猛發展. 帶通濾波器在微波通信、廣播電視和精密儀器設備中得到了廣泛應用. 帶通濾波器性能的優劣,對提高接收機信噪比,防止鄰近信道干擾,提高設備的技術指標,有著十分重要的意義.我在長期的教學實踐中,用切比雪夫型方法設計、計算出寬帶濾波器集中參數元件的數據. 該濾波器可運用在檢測微波頻率的儀器和其他設備中. 再將其思路和計算方法介紹給大家,供參考.
上傳時間: 2014-12-28
上傳用戶:Yukiseop
The AT89C52 is a low-power, high-performance CMOS 8-bit microcomputer with 8Kbytes of Flash programmable and erasable read only memory (PEROM). The deviceis manufactured using Atmel’s high-density nonvolatile memory technology and iscompatible with the industry-standard 80C51 and 80C52 instruction set and pinout.The on-chip Flash allows the program memory to be reprogrammed in-system or by aconventional nonvolatile memory programmer. By combining a versatile 8-bit CPUwith Flash on a monolithic chip, the Atmel AT89C52 is a powerful microcomputerwhich provides a highly-flexible and cost-effective solution to many embedded controlapplications.
上傳時間: 2013-11-10
上傳用戶:1427796291
load initial_track s; % y:initial data,s:data with noiseT=0.1; % yp denotes the sample value of position% yv denotes the sample value of velocity% Y=[yp(n);yv(n)];% error deviation caused by the random acceleration % known dataY=zeros(2,200);Y0=[0;1];Y(:,1)=Y0;A=[1 T 0 1]; B=[1/2*(T)^2 T]';H=[1 0]; C0=[0 0 0 1];C=[C0 zeros(2,2*199)];Q=(0.25)^2; R=(0.25)^2;
上傳時間: 2014-12-28
上傳用戶:asaqq
現實世界中有很多問題,它的機理較簡單,用靜態,線性或邏輯的方法即可建立模型,使用初等的數學方法,即可求解,我們稱之為初等數學模型。本章主要介紹有關自然數,比例關系,狀態轉移,及量剛分析等建模例子,這些問題的巧妙的分析處理方法,可使讀者達到舉一反三,開拓思路,提高分析, 解決實際問題的能力。 在人們的生產實踐中,經常會遇到如何利用現有資源來安排生產,以取得最大經濟效益的問題。此類問題構成了運籌學的一個重要分支—數學規劃,而線性規劃(Linear Programming 簡記LP)則是數學規劃的一個重要分支。自從1947年G. B. Dantzig 提出求解線性規劃的單純形方法以來,線性規劃在理論上趨向成熟,在實用中日益廣泛與深入。特別是在計算機能處理成千上萬個約束條件和決策變量的線性規劃問題之后,線性規劃的適用領域更為廣泛了,已成為現代管理中經常采用的基本方法之一。 如果目標函數或約束條件中包含非線性函數,就稱這種規劃問題為非線性規劃問題。一般說來,解非線性規劃要比解線性規劃問題困難得多。而且,也不象線性規劃有單純形法這一通用方法,非線性規劃目前還沒有適于各種問題的一般算法,各個方法都有自己特定的適用范圍。 下面通過實例歸納出非線性規劃數學模型的一般形式,介紹有關非線性規劃的基本概念。
上傳時間: 2013-10-19
上傳用戶:lunshaomo
這是一些設計程序,如果你會一些調試方面的東西,把這個看懂了,結合硬件就可以實現了
上傳時間: 2013-11-19
上傳用戶:lixinxiang
100-Gb光傳送網(OTN)復用轉發器 a. 提供連續數據范圍在600 Mbps到14.1 Gbps之間的串行收發器,通過使用方便的部分重新配置功能支持多標準客戶側接口; b. 44個獨立發送時鐘域,提高了時鐘靈活性; c. 收發器集成電信號散射補償(EDC)功能,可直接驅動光模塊(SFP+、SFP、QSFP、CFP); d. 支持下一代光接口的28-Gbps收發器; e. 替代外部壓控晶體振蕩器(VCXO)的高級fPLL。
上傳時間: 2013-11-19
上傳用戶:zhyiroy
Introduction to Xilinx Packaging Electronic packages are interconnectable housings for semiconductor devices. The major functions of the electronic packages are to provide electrical interconnections between the IC and the board and to efficiently remove heat generated by the device. Feature sizes are constantly shrinking, resulting in increased number of transistors being packed into the device. Today's submicron technology is also enabling large-scale functional integration and system-on-a-chip solutions. In order to keep pace with these new advancements in silicon technologies, semiconductor packages have also evolved to provide improved device functionality and performance. Feature size at the device level is driving package feature sizes down to the design rules of the early transistors. To meet these demands, electronic packages must be flexible to address high pin counts, reduced pitch and form factor requirements. At the same time,packages must be reliable and cost effective.
上傳時間: 2013-10-22
上傳用戶:ztj182002
Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."
標簽: Base-Station Applications Single-Chip Transceiver
上傳時間: 2013-11-07
上傳用戶:songrui
為了滿足超聲波探傷檢測的實時性需求,通過研究超聲波探傷的工作原理,提出了基于FPGA芯片的實時信號處理系統實現方案及硬件結構設計,并根據FPGA邏輯結構模型實現了軟件系統的模塊化設計。根據實驗測試及統計數據得出,基于FPGA芯片的信號處理系統提高了探傷檢測的準確性與穩定性,滿足了探傷過程中B超顯示的實時性要求。
上傳時間: 2013-10-11
上傳用戶:909000580
樊昌信版英文課件,精品哦!?。。。。。。。。。。。?/p>
上傳時間: 2013-11-04
上傳用戶:如果你也聽說