Industrial systems demand semiconductors that are precise, flexibleand reliable. Linear Technology offers a broad line of high performanceanalog ICs that simplify system design with rugged devices featuringparameters fully guaranteed over the -40°C to 85°C temperature range.We back this up with knowledgeable applications support, long productlife cycles and superior on-time delivery.
上傳時間： 2013-11-02
上傳用戶：xiaodu1124
Finite state machines are widely used in digital circuit designs. Generally, when designing a state machine using an HDL, the synthesis tools will optimize away all states that cannot be reached and generate a highly optimized circuit. Sometimes, however, the optimization is not acceptable. For example, if the circuit powers up in an invalid state, or the circuit is in an extreme working environment and a glitch sends it into an undesired state, the circuit may never get back to its normal operating condition.
標簽： Creating Machines Mentor State
上傳時間： 2013-10-08
上傳用戶：wangzhen1990
Abstract: Investment in smart meters and smart grid end equipment continues to grow worldwide as countriestry to make their electric delivery systems more efficient. However, as critical as the electric deliveryinfrastructure is, it is normally not secured and thus subject to attack. This article describes the concept oflife-cycle security—the idea that embedded equipment in the smart grid must have security designed into theentire life of the product, even back to the contract manufacturer. We also talk about how life-cycle securityapplies to embedded equipment in the smart grid. Potential threats are discussed, as are potential solutionsto mitigate the risks posed by those threats.
上傳時間： 2014-12-24
上傳用戶：熊少鋒
針對目前汽車追尾事件頻發問題，提出一種防汽車車前和車后追尾的安全裝置設計。該設計以高性能、低功耗的8位AVR微處理器ATmega8L為核心，結合霍爾式車速傳感器、激光雷達測距裝置和MMA7260QT加速度傳感器，能夠兼顧車前和車后，摒棄以往設計中只考慮車前或車后單一性缺點，尤其適用于高速、夜晚或新手行車。 Abstract: Aiming at the high frequency of vehicle rear-end collision，a safe device design of anti-vehicle rear-end collision is presented.In the design，the high-performance，low-power8-bit AVR microprocessor ATmega8L is utilized as a core combined with Hall-type speed sensor，laser-radar ranging devices and the acceleration sensor MMA7260QT.The design considers both the front and back of a car，and overcomes the drawbacks of former designs in which only the front or the back of the car is considered，so it is especially suitable for high-speed，night or the beginner’s driving.
上傳時間： 2013-10-14
上傳用戶：GavinNeko
介紹一種簡單射頻識別系統設計。該設計包括閱讀器、應答器和線圈3部分。由單片機控制閱讀器向應答器發射無線信號，并接收應答器回送的信號，再通過分析回送信號識別物品。閱讀器和應答器之間以半雙工通信方式通信。 Abstract: A simple design of radio frequency identification system is given in this paper.The design includes reader,responder and winding.Through MCU，signals are sent to responder from reader，then corresponding signals are sent back. According to the analysis of the signals sent back，the objects can be identified.Half-duplex communication is adopted? between? reader? and? responder.
上傳時間： 2013-10-11
上傳用戶：plsee
The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual masterI2C-bus applications where system operation is required, even when one master fails orthe controller card is removed for maintenance. The two masters (for example, primaryand back-up) are located on separate I2C-buses that connect to the same downstreamI2C-bus slave devices. I2C-bus commands are sent by either I2C-bus master and are usedto select one master at a time. Either master at any time can gain control of the slavedevices if the other master is disabled or removed from the system. The failed master isisolated from the system and will not affect communication between the on-line masterand the slave devices on the downstream I2C-bus.
上傳時間： 2013-10-09
上傳用戶：3294322651
AVR Studio 幫助文件中文翻譯，網友翻譯的AVR Studio軟件里面的幫助文件。轉自“我們的AVR”網站，在此表示感謝。 圖元文件（metafile） 以.emf為擴展名的文件。是下面各種結構的基本組成部分，可以用來讓AVR LCD編輯器設計軟件模擬顯示器。它可以是一個段或者一個圖像。您不能直接用AVR LCD編輯器生成一個這樣的圖元文件。但是可以使用第三方軟件。Companion Software的Metafile Companion和Microsoft Visio 就是兩個讓用戶自己定義圖元文件的軟件。在市場上有好多更簡單，更便宜的轉換軟件支持gif，jpeg，bmp等的文件轉換成.emf文件。 (例如：www.harmware.com 網站上的Batch Thumb 、和www.irfanview.com網站上的IrfanView). 段（segment）這是軟件模擬顯示器的一部分。用LCD編輯器您可以分配所有的段對應到實際的LCD寄存器的位上。段被存成.emf文件。圖像（image）被用作背景圖像和外圍圖像的圖元文件。充當所有段的布景。這些對象是“靜態”的，不對任何LCD寄存器值有反映。圖像也被存成.emf文件。 模擬顯示器（display）多層的元文件和圖像的組合。它包含LCD 寄存器的分配信息。用XML格式保存成.dis文件。組（group）為了簡化設計，需要頻繁的保存使用段。組就是同一層中一些段（圖元文件）的集合。它的設計沒有實際的限制，但是不能包括靜態圖像（背景/前景）。最典型的組就是7段碼數字字型。組只是理論的設計工具，在最終的模擬顯示器文件中是沒有組存在的。組用擴展名為.pri 的文件保存。 對象（object）對包括以上各個元件的各種事物的稱謂的術語。模擬顯示器文件（display file）以.dis為擴展名的XML類型的文件。包含了所有的關于顯示器的信息。
上傳時間： 2013-10-31
上傳用戶：paladin
When I started writing the first edition of RF Power Amplifiers for Wireless Communications,some time back in 1997, it seemed that I was roaming a largely uninhabitedlandscape. For reasons still not clear to me there were few, if any, otherbooks dedicated to the subject of RF power amplifiers. Right at the same time, however,hundreds of engineers were being assigned projects to design PAs for wirelesscommunications products. It was not, therefore, especially difficult to be successfulwith a book that was fortuitously at the right place and the right time.
標簽： Communications Amplifiers Wireless Edition
上傳時間： 2013-11-12
上傳用戶：YYRR
Finite state machines are widely used in digital circuit designs. Generally, when designing a state machine using an HDL, the synthesis tools will optimize away all states that cannot be reached and generate a highly optimized circuit. Sometimes, however, the optimization is not acceptable. For example, if the circuit powers up in an invalid state, or the circuit is in an extreme working environment and a glitch sends it into an undesired state, the circuit may never get back to its normal operating condition.
標簽： Creating Machines Mentor State
上傳時間： 2013-11-02
上傳用戶：xauthu
歡迎使用 PowerPCB 教程。本教程描述了 PADS-PowerPCB 的絕大部分功能和特點，以及使用的各個過程，這些功能包括： · 基本操作 · 建立元件(Component) · 建立板子邊框線(Board outline) · 輸入網表(Netlist) · 設置設計規則(Design Rule) · 元件(Part)的布局(Placement) · 手工和交互的布線 · SPECCTRA全自動布線器(Route Engine) · 覆銅(Copper Pour) · 建立分隔/混合平面層(Split/mixed Plane) · Microsoft的目標連接與嵌入(OLE)(Object Linking Embedding) · 可選擇的裝配選件(Assembly options) · 設計規則檢查(Design Rule Check) · 反向標注(Back Annotation) · 繪圖輸出(Plot Output) 使用本教程后，你可以學到印制電路板設計和制造的許多基本知識。
上傳時間： 2013-10-08
上傳用戶：x18010875091
