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模拟电子 利用数字电位器调整并校准升压型DC-DC转换器
The purpose of this application note is to show an example of how a digital potentiometer can be used in thefeedback loop of a step-up DC-DC converter to provide calibration and/or adjustment of the output voltage.The example circuit uses a MAX5025 step-up DC-DC converter (capable of generating up ...
模拟电子 射频集成电路设计John Rogers(Radio Freq
Radio Frequency Integrated Circuit Design
I enjoyed reading this book for a number of reasons. One reason is that itaddresses high-speed analog design in the context of microwave issues. This isan advanced-level book, which should follow courses in basic circuits andtransmission lines. Most analog i ...
电源技术 基于FPGA的高度集成DCDC稳压器
 
In a recent discussion with a system designer, the requirementfor his power supply was to regulate 1.5Vand deliver up to 40A of current to a load that consistedof four FPGAs. This is up to 60W of power that must bedelivered in a small area with the lowest height profi lepossible to allow ...
单片机编程 基于C8051F005单片机的参数测试仪的设计
介绍了基于单片机航空交流电参数测试仪的系统设计。以Silicon Labs公司的C8051F005单片机为核心设计出数据采集板，通过RS-232串口与上位机通讯。运用Lab Windows/CVI编写的上位机软件实现信号的检测以及波形和数据的显示，给出了测试仪硬件电路的组成和软件流程图。本系统具有硬件结构简单、容易实现和成本低等特点，在实际 ...
单片机编程 基于变频调速的水平连铸机拉坯辊速度控制系统
基于变频调速的水平连铸机拉坯辊速度控制系统Frequency Inverter Based Drawing RollerS peedC ontrolSy stem ofHorizontal Continuous Casting MachineA 伟刘冲旅巴(南 华 大 学电气工程学院，衡阳421001)摘要拉坯辊速度控制是水平连铸工艺的关键技术之一，采用变频器实现水平连铸机拉坯辊速度程序控制，由信号发生装置给 ...
测试测量 LT5514三阶互调的精确测量
 
Accurate measurement of the third order intercept pointfor low distortion IC products such as the LT5514 requirescertain precautions to be observed in the test setup andtesting procedure. The LT5514 linearity performance ishigh enough to push the test equipment and test set-up totheir lim ...
Java编程 Java Clock is a FREE Java applet used to display a clock on your Web pages. You can display either a
Java Clock is a FREE Java applet used to display a clock on your Web pages. You can display either analog or digital clock. The full source code of this applet is also available (visit my home page to download it). You may use this applet on your Web pages WITHOUT paying me fee or royalty as long as ...
电子书籍 In this book, we aim to give you an introduction to a wide variety of topics important to you as a d
In this book, we aim to give you an introduction to a wide variety of topics important to you as a developer using UNIX. The word Beginning in the title refers more to the content than to your skill level. We ve structured the book to help you learn more about what UNIX has to offer, however much ex ...
Java书籍 This book isn t for uber-programmers who already have all the answers. If you think that J2EE does e
This book isn t for uber-programmers who already have all the answers. If you think that J2EE does everything that you need it to do and you can make it sing, this book is not for you. Believe me, there are already enough books out there for you.
其他 * Function: * 1. Replace the first oldstr with newstr in srcstr * Arguments: * IN : * srcst
* Function:
* 1. Replace the first oldstr with newstr in srcstr
* Arguments:
* IN :
* srcstr
* oldstr
* newstr
* OUT :
* srcstr
* Return:
* 1. If find and replace one oldstr with newstr in srcstr , return 1
* 2. If find no oldstr in srcstr , return 0
* 3. If error (malloc return NULL) ...