通过比较各种隔离数字通信的特点和应用范围，指出塑料光纤在隔离数字通信中的优势。使用已经标准化的TOSLINK接口，有利于节省硬件开发成本和简化设计难度。给出了塑料光纤的硬件驱动电路，说明设计过程中的注意事项，对光收发模块的电压特性和频率特性进行全面试验，并给出SPI口使用塑料光纤隔离通信的典型应用电路图。试验结果表明，该设计可为电力现场、电力电子及仪器仪表的设计提供参考。 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.
上传时间： 2014-01-10
上传用户：gundan
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. 无线通信和数据在新一代手机和PDA中的融合为再一次的生产力飞跃创造了条件。。随之而来的将是经济的增长和全新的工作方式，在便携式计算机领域，PC笔记本曾经扮演了类似的开拓者角角。
上传时间： 2013-10-17
上传用户：erkuizhang
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.
上传时间： 2014-03-18
上传用户：wenwiang
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.
标签： Considerations Guidelines and Design
上传时间： 2013-11-09
上传用户：ls530720646
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
上传时间： 2015-01-03
上传用户：时代将军
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."
上传时间： 2013-11-06
上传用户：WMC_geophy
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.
上传时间： 2013-11-18
上传用户：zgz317
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. 滚动显示位图 在VC++环境下，在一个对话框中显示一个原始尺寸的大小的位图文件相当是困难的。然而,通过使用 StretchBlt()函数一个给定的区域显示一个大的位图是可能的。主要的缺点是图像将会失真。看了这篇通过卷动技术显示整个位图技术的文章，你将能够以它的原始尺寸在给定对话框的区域内显示一个大位图。 来源: http://www.codeguru.com/bitmap/ScrollBitmap.html
标签： Displaying difficult original bitmap
上传时间： 2014-01-05
上传用户：yiwen213
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.
标签： Generating SQLServer customer problems
上传时间： 2015-01-11
上传用户：as275944189
推荐一个快速压缩算法，本人试过，很好用，详细说明请参看：http://www.codeguru.com/Cpp/Cpp/algorithms/compression/article.php/c7043/
标签： 压缩算法
上传时间： 2014-01-10
上传用户：yyq123456789
