SDH傳輸系統光接口 SDH光接口的分類及應用代碼 應用代碼的表達方式:X-Y.Z,如:V-64.2、S-64.1
上傳時間: 2013-11-22
上傳用戶:非洲之星
通過比較各種隔離數字通信的特點和應用范圍,指出塑料光纖在隔離數字通信中的優勢。使用已經標準化的TOSLINK接口,有利于節省硬件開發成本和簡化設計難度。給出了塑料光纖的硬件驅動電路,說明設計過程中的注意事項,對光收發模塊的電壓特性和頻率特性進行全面試驗,并給出SPI口使用塑料光纖隔離通信的典型應用電路圖。試驗結果表明,該設計可為電力現場、電力電子及儀器儀表的設計提供參考。 Abstract: y comparing characteristics and applications area of various isolated digital communications, this article indicates advantages of plastic optical fiber in isolated digital communications. Using the standardized TOSLINK interface, it helps to control costs and difficulty in hardware development and design. Then it gives the hardware driver circuit of plastic optical fiber module, explains the noticed details in design process, gives results on the basis of the optical transceiver module voltage characteristics and frequency characteristics tests. Finally,it gives typical application circuit of the SPI communication port by using plastic optical fiber isolation .The results show that this design can be referenced for the power field, power electronics and instrumentation design.
上傳時間: 2014-01-10
上傳用戶:gundan
買的開發板上帶的52個應用于實物的程序,希望對大家有幫助
上傳時間: 2013-11-04
上傳用戶:xymbian
創新、效能、卓越是ADI公司的文化支柱。作為業界公認的全球領先數據轉換和信號調理技術領先者,我們除了提供成千上萬種產品以外,還開發了全面的設計工具,以便客戶在整個設計階段都能輕松快捷地評估電路。
上傳時間: 2013-11-25
上傳用戶:kachleen
創新、效能、卓越是ADI公司的文化支柱。作為業界公認的全球領先數據轉換和信號調理技術領先者,我們除了提供成千上萬種產品以外,還開發了全面的設計工具,以便客戶在整個設計階段都能輕松快捷地評估電路。
上傳時間: 2013-10-18
上傳用戶:cxl274287265
中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
標簽: UltraScale Xilinx 架構
上傳時間: 2013-11-21
上傳用戶:wxqman
有時候,做元件封裝的時候,做得不是按中心設置為原點(不提倡這種做法),所以制成之后導出來的坐標圖和直接提供給貼片廠的要求相差比較大。比如,以元件的某一個pin 腳作為元件的原點,明顯就有問題,直接修改封裝的話,PCB又的重新調整。所以想到一個方法:把每個元件所有的管腳的X坐標和Y坐標分別求平均值,就為元件的中心。
上傳時間: 2014-01-09
上傳用戶:xzt
enter——選取或啟動 esc——放棄或取消 f1——啟動在線幫助窗口 tab——啟動浮動圖件的屬性窗口 pgup——放大窗口顯示比例 pgdn——縮小窗口顯示比例 end——刷新屏幕 del——刪除點取的元件(1個) ctrl+del——刪除選取的元件(2個或2個以上) x+a——取消所有被選取圖件的選取狀態 x——將浮動圖件左右翻轉 y——將浮動圖件上下翻轉 space——將浮動圖件旋轉90度 crtl+ins——將選取圖件復制到編輯區里 shift+ins——將剪貼板里的圖件貼到編輯區里 shift+del——將選取圖件剪切放入剪貼板里 alt+backspace——恢復前一次的操作 ctrl+backspace——取消前一次的恢復 crtl+g——跳轉到指定的位置 crtl+f——尋找指定的文字
上傳時間: 2013-11-01
上傳用戶:a296386173
PCB LAYOUT 術語解釋(TERMS)1. COMPONENT SIDE(零件面、正面)︰大多數零件放置之面。2. SOLDER SIDE(焊錫面、反面)。3. SOLDER MASK(止焊膜面)︰通常指Solder Mask Open 之意。4. TOP PAD︰在零件面上所設計之零件腳PAD,不管是否鑽孔、電鍍。5. BOTTOM PAD:在銲錫面上所設計之零件腳PAD,不管是否鑽孔、電鍍。6. POSITIVE LAYER:單、雙層板之各層線路;多層板之上、下兩層線路及內層走線皆屬之。7. NEGATIVE LAYER:通常指多層板之電源層。8. INNER PAD:多層板之POSITIVE LAYER 內層PAD。9. ANTI-PAD:多層板之NEGATIVE LAYER 上所使用之絕緣範圍,不與零件腳相接。10. THERMAL PAD:多層板內NEGATIVE LAYER 上必須零件腳時所使用之PAD,一般稱為散熱孔或導通孔。11. PAD (銲墊):除了SMD PAD 外,其他PAD 之TOP PAD、BOTTOM PAD 及INNER PAD 之形狀大小皆應相同。12. Moat : 不同信號的 Power& GND plane 之間的分隔線13. Grid : 佈線時的走線格點2. Test Point : ATE 測試點供工廠ICT 測試治具使用ICT 測試點 LAYOUT 注意事項:PCB 的每條TRACE 都要有一個作為測試用之TEST PAD(測試點),其原則如下:1. 一般測試點大小均為30-35mil,元件分布較密時,測試點最小可至30mil.測試點與元件PAD 的距離最小為40mil。2. 測試點與測試點間的間距最小為50-75mil,一般使用75mil。密度高時可使用50mil,3. 測試點必須均勻分佈於PCB 上,避免測試時造成板面受力不均。4. 多層板必須透過貫穿孔(VIA)將測試點留於錫爐著錫面上(Solder Side)。5. 測試點必需放至於Bottom Layer6. 輸出test point report(.asc 檔案powerpcb v3.5)供廠商分析可測率7. 測試點設置處:Setuppadsstacks
上傳時間: 2013-11-17
上傳用戶:cjf0304
LAYOUT REPORT .............. 1 目錄.................. 1 1. PCB LAYOUT 術語解釋(TERMS)......... 2 2. Test Point : ATE 測試點供工廠ICT 測試治具使用............ 2 3. 基準點 (光學點) -for SMD:........... 4 4. 標記 (LABEL ING)......... 5 5. VIA HOLE PAD................. 5 6. PCB Layer 排列方式...... 5 7.零件佈置注意事項 (PLACEMENT NOTES)............... 5 8. PCB LAYOUT 設計............ 6 9. Transmission Line ( 傳輸線 )..... 8 10.General Guidelines – 跨Plane.. 8 11. General Guidelines – 繞線....... 9 12. General Guidelines – Damping Resistor. 10 13. General Guidelines - RJ45 to Transformer................. 10 14. Clock Routing Guideline........... 12 15. OSC & CRYSTAL Guideline........... 12 16. CPU
上傳時間: 2013-10-29
上傳用戶:1234xhb