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基于塑料光纖的高壓隔離通信接口設計

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.

標簽： 塑料光纖高壓隔離通信接口設計

上傳時間： 2014-01-10

上傳用戶：gundan
錯誤觀念妨礙電量計在無線手機中的應用

Abstract: Most hand-held products lack accurate battery-charge monitors ("fuel gauges") because of the misconception that an accurate fuel gauge is difficult to achieve. This article debunks the myths and discusses how to accurately monitor charge at all temperatures, charge and discharge rates, and aging conditions. 無線通信和數據在新一代手機和PDA中的融合為再一次的生產力飛躍創造了條件。。隨之而來的將是經濟的增長和全新的工作方式，在便攜式計算機領域，PC筆記本曾經扮演了類似的開拓者角角。

標簽： 錯誤電量計無線手機

上傳時間： 2013-10-17

上傳用戶：erkuizhang
錯誤觀念妨礙電量計在無線手機中的應用

Abstract: Most hand-held products lack accurate battery-charge monitors ("fuel gauges") because of the misconception that an accurate fuel gauge is difficult to achieve. This article debunks the myths and discusses how to accurately monitor charge at all temperatures, charge and discharge rates, and aging conditions.

標簽： 錯誤電量計無線手機

上傳時間： 2014-03-18

上傳用戶：wenwiang
PCB Design Considerations and Guidelines for 0.4mm and 0.5mm WLPs

Abstract: Using a wafer-level package (WLP) can reduce the overall size and cost of your solution.However when using a WLP IC, the printed circuit board (PCB) layout can become more complex and, ifnot carefully planned, result in an unreliable design. This article presents some PCB designconsiderations and general recommendations for choosing a 0.4mm- or 0.5mm-pitch WLP for yourapplication.

標簽： Considerations Guidelines and Design

上傳時間： 2013-11-09

上傳用戶：ls530720646
新一代儀表和電流檢測放大器

Abstract: This application note discusses the REF pin functionality in the indirect current-feedbackarchitecture for instrumentation amplifiers. This article compares the importance of a REF buffer in a

標簽： 儀表電流檢測放大器

上傳時間： 2015-01-03

上傳用戶：時代將軍
高精度溫度測量鉑電阻溫度探測器(PRTDs)和??ADC

Abstract: Many modern industrial, medical, and commercial applications require temperature measurements in the extended temperature rangewith accuracies of ±0.3°C or better, performed with reasonable cost and often with low power consumption. This article explains how platinumresistance temperature detectors (PRTDs) can perform measurements over wide temperature ranges of -200°C to +850°C, with absolute accuracyand repeatability better than ±0.3°C, when used with modern processors capable of resolving nonlinear mathematical equation quickly and costeffectively. This article is the second installment of a series on PRTDs. For the first installment, please read application note 4875, "High-Accuracy Temperature Measurements Call for Platinum Resistance Temperature Detectors (PRTDs) and Precision Delta-Sigma ADCs."

標簽： PRTDs ADC 高精度溫度測量

上傳時間： 2013-11-06

上傳用戶：WMC_geophy
談集成電路的通用接口

Abstract: How can an interface change a happy face to a sad face? Engineers have happy faces when an interface works properly.Sad faces indicate failure somewhere. Because interfaces between microprocessors and ICs are simple—even easy—they are oftenignored until interface failure causes sad faces all around. In this article, we discuss a common SPI error that can be almostimpossible to find in a large system. Links to interface tutorial information are provided for complete information. Noise as a systemissue and ICs to minimize its effects are also described.

標簽： 集成電路通用接口

上傳時間： 2013-11-18

上傳用戶：zgz317
Displaying a large bitmap file on a dialog box, in its original size, is quite difficult in the VC++

Displaying a large bitmap file on a dialog box, in its original size, is quite difficult in the VC++ environment. However, it is possible to display a large bitmap to a predefined area of the dialog by using the StretchBlt( ) function.The major disadvantage of this is that the clarity of the image will be lost. Check out this article for displaying large bitmaps into the desired area of your dialog box in its original size with a scrolling technique used to show the entire bitmap. 滾動顯示位圖在VC++環境下，在一個對話框中顯示一個原始尺寸的大小的位圖文件相當是困難的。然而,通過使用 StretchBlt()函數一個給定的區域顯示一個大的位圖是可能的。主要的缺點是圖像將會失真。看了這篇通過卷動技術顯示整個位圖技術的文章，你將能夠以它的原始尺寸在給定對話框的區域內顯示一個大位圖。來源: http://www.codeguru.com/bitmap/ScrollBitmap.html

標簽： Displaying difficult original bitmap

上傳時間： 2014-01-05

上傳用戶：yiwen213
Generating next numbers in SQLServer should not be a problem. But problems arise when a customer ask

Generating next numbers in SQLServer should not be a problem. But problems arise when a customer asks for different types of next numbers that you cannot generate directly from SQL Server. This brief article describes how you would tackle this problem in different scenarios.

標簽： Generating SQLServer customer problems

上傳時間： 2015-01-11

上傳用戶：as275944189
推薦一個快速壓縮算法

推薦一個快速壓縮算法，本人試過，很好用，詳細說明請參看：http://www.codeguru.com/Cpp/Cpp/algorithms/compression/article.php/c7043/

標簽： 壓縮算法

上傳時間： 2014-01-10

上傳用戶：yyq123456789