In this paper, two types of MMIC voltage controlled oscillators have been successfully demonstrated. The First chip with single tuning diode shows the excellent tuning linearity. The second chip with two tuning diodes can improve the tuning bandwidth.
Specifying the right reference and applying it correctly isa more difficult task than one might First surmise, consideringthat references are only 2- or 3-terminal devices.Although the word “accuracy” is most often spoken inreference to references, it is dangerous to use this wordtoo freely because it can mean different things to differentpeople. Even more perplexing is the fact that a referenceclassified as a dog in one application is a panacea inanother. This application note will familiarize the readerwith the various aspects of reference “accuracy” andpresent some tips on extracting maximum performancefrom any reference.
Occasionally, we are tasked with designing circuitry for aspecific purpose. The request may have customer originsor it may be an in-house requirement. Alternately, a circuitmay be developed because its possibility is simply tooattractive to ignore1. Over time, these circuits accumulate,encompassing a wide and useful body of proven capabilities.They also represent substantial effort. These considerationsmake publication an almost obligatory propositionand, as such, a group of circuits is presented here. This isnot the First time we have displayed such wares and, giventhe encouraging reader response, it will not be the last2.Eighteen circuits are included in this latest effort, roughlyarranged in the categories given in this publication’s title.They appear at the next paragraph.
Permission to make digital or hard copies of all or part of this work forpersonal or classroom use is granted without fee provided that copies arenot made or distributed for profit or commercial advantage and that copiesbear this notice and the full citation on the First page. To copy otherwise, torepublish, to post on servers or to redistribute to lists, requires prior specificpermission.
KEIL7.0完全破解版、中文補丁
k51v700acc.com
Keil C51 V7.00 0FDH的漢字bug補丁,同時處理A51和C51兩個文件,把他放到\bin\目錄下執行。
this software is update to bin\ for hanzhi use
SN = K1RIP-M2192-KO14E
用戶名(First & LAST)= 11RI2Z
這是已經通過了的安裝碼
安裝過程:
可以選擇評估安裝,也可以選擇完全安裝.選擇完全安裝后輸入上面系列號,如果提示插入A盤時選擇解壓目錄的/ADDON/c51AddON/目錄即可完成安裝。
解壓目錄帶有minitos for keil C51的項目,可以直接在Keil C51上測試和學習嵌入式操作系統。
minitos for 51版本
可以使用keilc51進行調試,
學習嵌入操作系統
無須硬件支持,可以在keilc51可以直接運行
minitos 0226 for keil C51的項目文件在: \MiniTOS51_0226移植_Release_20090204\MiniTOS\KeilC51\project
文件名為minitos51.Uv2
在深入了解Flash存儲器的基礎上,采用單片機自動檢測存儲器無效塊。主要通過讀取每一塊的第1、第2頁內容,判斷該塊的好壞,并給出具體的實現過程,以及部分關鍵的電路原理圖和C語言程序代碼。該設計最終實現單片機自動檢測Flash壞塊的功能,并通過讀取ID號檢測Flash的性能,同時該設計能夠存儲和讀取1GB數據。
Abstract:
On the basis of in-depth understanding the Flash chips,this paper designs a new program which using the SCM to detect the invalid block.Mainly through reading the data of the First and second page to detect the invalid block.Specific implementation procedure was given,and the key circuit schematic diagram and C language program code was introduced.This design achieved the function of using the MCU checks the invalid block finally,and increased the function by reading the ID number of Flash to get the performance of the memory.And the design also can write and read1GB data
針對盤山路存在的轉彎盲區,即在轉彎時司機無法得知彎路對面是否有車輛通過,設計一種基于C8051F310的山路轉彎預防警示系統。該系統利用一階濾波算法檢測山路轉彎時是否有車輛通過。運用該算法可增強系統檢測的實時性,提高檢測機動車輛的靈敏度,同時大大減少環境溫度對檢測的干擾。試驗表明該系統能夠正確指示出在山路轉彎時是否有車輛通過,目前該系統已安裝在盤山路上,可大大減少事故的發生率。
Abstract:
Aiming at passing hilly road,there is a turn blind spot.Motormen usually do not know if the passing of vehicles pass the road.So a system of defending accident on hilly road is designed,which is based on MCU C8051F310.The sys-tem uses the First-order filter algorithm to detect whether there are passing vehicles.This algorithm enhances the real-time detection and improves the sensitivity of detection vehicles.Meanwhile,it reduces the detection interference of environmen-tal temperature.The experimental results show that this system can exactly indicate if there are passing vehicles.At present,the system has been successfully applied to hilly road.The system can greatly decrease accident.
介紹一種采用單片機技術和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對整個系統框架進行說明,然后介紹主要功能模塊的設計,給出了各模塊的原理圖。重點描述了基站器件EM4095的性能參數和功能原理,最后描述了該系統的主程序流程圖。
Abstract:
In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At First,the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last,the main software flow is given