芯嵌stm32開發(fā)板教程
上傳時間: 2013-11-07
上傳用戶:windgate
芯嵌stm32開發(fā)板配套教程
上傳時間: 2013-10-29
上傳用戶:Huge_Brother
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標簽: UBOOT 嵌入式系統(tǒng)設計
上傳時間: 2013-10-24
上傳用戶:shen_dafa
本文將探討微控制器與 PSoC (可編程系統(tǒng)單晶片)在數(shù)位電視應用上的設計挑戰(zhàn),並比較微控制器和 PSoC 架構在處理這些挑戰(zhàn)時的不同處,以有效地建置執(zhí)行。
上傳時間: 2013-11-22
上傳用戶:gengxiaochao
Linear Technology offers some of the highest performance RF and signal chain solutions for wireless and cellularinfrastructure. These products support worldwide standards including, LTE, WiMAX, GSM,W-CDMA, TD-SCDMA,CDMA, and CDMA2000. Other wireless systems include broadband microwave data links, secure communications,satellite receivers, broadband wireless access, wireless broadcast systems, RFID readers and cable infrastructure
上傳時間: 2013-11-04
上傳用戶:kiklkook
設計了Ka波段螺旋線行波管的慢波結構,分析其色散特性曲線和耦合阻抗,對高頻系統(tǒng)進行了優(yōu)化;利用PIC粒子模擬得到在工作頻帶內飽和輸出功率>73.5 W,增益畸變<2%,并對試制樣管進行了試驗,測得在工作頻帶內輸出功率>45 W,電子效率>12.5%,采用4級降壓收集極后總效率大于40%,最后對模擬結果和實測結果的差異原因進行了簡單分析。
上傳時間: 2013-12-14
上傳用戶:米米陽123
Single-Ended and Differential S-Parameters Differential circuits have been important incommunication systems for many years. In the past,differential communication circuits operated at lowfrequencies, where they could be designed andanalyzed using lumped-element models andtechniques. With the frequency of operationincreasing beyond 1GHz, and above 1Gbps fordigital communications, this lumped-elementapproach is no longer valid, because the physicalsize of the circuit approaches the size of awavelength.Distributed models and analysis techniques are nowused instead of lumped-element techniques.Scattering parameters, or S-parameters, have beendeveloped for this purpose [1]. These S-parametersare defined for single-ended networks. S-parameterscan be used to describe differential networks, but astrict definition was not developed until Bockelmanand others addressed this issue [2]. Bockelman’swork also included a study on how to adapt single-ended S-parameters for use with differential circuits[2]. This adaptation, called “mixed-mode S-parameters,” addresses differential and common-mode operation, as well as the conversion betweenthe two modes of operation.This application note will explain the use of single-ended and mixed-mode S-parameters, and the basicconcepts of microwave measurement calibration.
上傳時間: 2014-03-25
上傳用戶:yyyyyyyyyy
真空斷路器滅弧室觸頭是斷路器實現(xiàn)分閘合閘的關鍵部件,需定期檢查,但常規(guī)人工檢測方法費時費力。經(jīng)過對真空斷路器滅弧室機械結構特點與動作過程的研究,設計出一種基于ARM處理器的觸頭磨損度檢測系統(tǒng),此系統(tǒng)由安裝在斷路器端的從機和安裝在控制室電腦上的主機適配器組成,系統(tǒng)使用搭載ARM1176JZF-S處理器的S3C6410芯片、AD3812模塊、W-DCD5位移傳感器、4432系列射頻無線模塊等器件實現(xiàn)了在機房使用一臺PC機或手機短信對多臺真空斷路器滅弧室觸頭磨損進行遠程檢測與控制。經(jīng)測試,系統(tǒng)檢測誤差低于0.78%。系統(tǒng)檢測精度高,使用方便實時性好,可靠性強,大大減少了以往的觸頭檢測工作量。
標簽: ARM 真空斷路器 檢測系統(tǒng) 磨損
上傳時間: 2013-10-14
上傳用戶:nanshan
本書是c語言的設計者之一dennis m.ritchie和著名的計算機科學家brian w.kernighan合著的一本介紹c語言的權威經(jīng)典著作。我們現(xiàn)在見到的大量論述c語言程序設計的教材和專著均以此書為藍本。
上傳時間: 2013-10-10
上傳用戶:sunchao524
實現(xiàn)了整條支路的LED路燈定時控制開關燈、自動開關燈、獨立控制開關燈及故障報警等多項功能。對1 W LED路燈單元可調恒流驅動電源,可以按照設定要求調節(jié)LED輸出功率大小,實現(xiàn)調光功能。
標簽: 單片機 路燈 模擬控制系統(tǒng)
上傳時間: 2013-11-13
上傳用戶:大三三