As environmental concerns over traditional lighting increaseand the price of LEDs decreases, high power LEDsare fast becoming a popular lighting solution for offl ineapplications. In order to meet the requirements of offl inelighting—such as high power factor, high effi ciency, isolationand TRIAC dimmer compatibility—prior LED driversused many external discrete components, resulting incumbersome solutions. The LT®3799 solves complexity,space and performance problems by integrating all therequired functions for offl ine LED lighting.
上傳時間： 2013-10-13
上傳用戶：dongqiangqiang
This application note describes how to decode standard DTMF tones using the minimum number of external discrete components and a PIC. The two examples use a PIC which has an 8 bit timer and either a comparator or an ADC, although it can be modified for use on a PIC which has only digital I/O. The Appendices have example code for the 16C662 (with comparator) and 16F877 (using the ADC). As the majority of the Digital Signal Processing is done in software, little is required in the way of external signal conditioning. Software techniques are used to model the individual elements of a DTMF Decoder IC.
上傳時間： 2013-11-21
上傳用戶：zhaoke2005
51單片機及其應用:1.1.1 電子計算機的問世及其經典結構1946年2月15日，第一臺電子數字計算機問世，這標志著計算機時代的到來。（CALCULATOR）ENIAC（“埃尼阿克”）◆ENIAC是電子管計算機，時鐘頻率僅有100 KHz，但能在1秒鐘的時間內完成5000次加法運算。◆與現代的計算機相比，有許多不足，但它的問世開創了計算機科學技術的新紀元，對人類的生產和生活方式產生了巨大的影響 。 匈牙利籍數學家馮·諾依曼在方案的設計上做出了重要的貢獻。1946年6月，他又提出了“程序存儲”和“二進制運算”的思想，進一步構建了計算機由運算器、控制器、存儲器、輸入設備和輸出設備組成這一計算機的經典結構。（EDVAC-ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER）二、微型計算機的應用形態 從應用形態上，微機可以分成三種：
標簽： 51單片機
上傳時間： 2013-12-20
上傳用戶：d815185728
通過以太網遠程配置Nios II 處理器 應用筆記 Firmware in embedded hardware systems is frequently updated over the Ethernet. For embedded systems that comprise a discrete microprocessor and the devices it controls, the firmware is the software image run by the microprocessor. When the embedded system includes an FPGA, firmware updates include updates of the hardware image on the FPGA. If the FPGA includes a Nios® II soft processor, you can upgrade both the Nios II processor—as part of the FPGA image—and the software that the Nios II processor runs, in a single remote configuration session.
上傳時間： 2013-11-22
上傳用戶：chaisz
隨著USB技術日趨成熟，USB開發者只需要關注頂層開發即可，這樣雖然減少了工作量，但容易使開發者忽略USB基礎理論與概念，導致的弊端在于開發者一旦遇到問題，往往不知如何解決。作者基于多年USB開發經驗，針對當前很多USB開發者容易混淆的概念，進行深入淺出的剖析，針對枚舉和重枚舉的區別、不同啟動方式的區別等問題，進行了歸納總結。本文從對比的角度分析問題，有助于開發者理清USB的工作機理。
標簽： USB
上傳時間： 2013-10-26
上傳用戶：zaocan888
This directory contains utility for implementing generic Reqursive Least Squares (RLS) algorithm. The example shows how one can use the utility to estamate the parameters of a simple linear discrete time system.
標簽： implementing Reqursive directory algorithm
上傳時間： 2014-01-06
上傳用戶：gtf1207
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
標簽： signal Modulated analog create
上傳時間： 2015-05-14
上傳用戶：CHINA526
物流分析工具包。Facility location: Continuous minisum facility location, alternate location-allocation (ALA) procedure, discrete uncapacitated facility location Vehicle routing: VRP, VRP with time windows, traveling salesman problem (TSP) Networks: Shortest path, min cost network flow, minimum spanning tree problems Geocoding: U.S. city or ZIP code to longitude and latitude, longitude and latitude to nearest city, Mercator projection plotting Layout: Steepest descent pairwise interchange (SDPI) heuristic for QAP Material handling: Equipment selection General purpose: Linear programming using the revised simplex method, mixed-integer linear programming (MILP) branch and bound procedure Data: U.S. cities with populations of at least 10,000, U.S. highway network (Oak Ridge National Highway Network), U.S. 3- and 5-digit ZIP codes
標簽： location location-allocation Continuous alternate
上傳時間： 2015-05-17
上傳用戶：kikye
CT圖像重建的變換類算法，該方法采用fourier變換算法
上傳時間： 2014-01-11
上傳用戶：yd19890720
Included are the files wav1.m, wav2.m, wavecoef.mat and readme. wav2 function implements the tree structured wavelet transform of the input matrix, up to the given level of decomposition. Wav2 uses another function called wav1, which takes the well known wavelet transform of the given matrix. Daubechies wavelet coefficients are used for wavelet transform operation wahich is saved in wavcoeff.mat.
標簽： implements the wav Included
上傳時間： 2015-06-23
上傳用戶：愛死愛死
