This application note is an overview discussion of theLinear Technology SPICE macromodel library. It assumeslittle if any prior knowledge of this software library or itshistory. However, it does assume familiarity with both theanalog simulation program SPICE (or one of its manyderivatives), and modern day op amps, including bipolar,JFET, and MOSFET amplifier technologies
上传时间： 2013-11-14
上传用户：zhanditian
Abstract: This application note illustrates an intermediate 8V switching power supply for an automotive radio and infotainment system.The design withstands the complete automotive input voltage range (including cold crank and load dump conditions), assuring a stable8V supply for common subsystems such as a CD driver, LCDs, and a radio module in modern infotainment systems. To avoiddisturbance in the AM and FM bands, the switching power supply runs at a fixed frequency of 2MHz, enabling an ideal solution forradio systems.
上传时间： 2013-11-20
上传用户：feitian920
A recent trend in the design of portable devices has beento use ceramic capacitors to filter DC/DC converter inputs.Ceramic capacitors are often chosen because of theirsmall size, low equivalent series resistance (ESR) and highRMS current capability. Also, recently, designers havebeen looking to ceramic capacitors due to shortages oftantalum capacitors.
上传时间： 2013-11-05
上传用户：comer1123
LPC2210是基于一个支持实时仿真和嵌入式跟踪的16/32位ARM7TDMI-SCPU的微控制器。对代码规模有严格控制的应用可使用16位Thumb模式将代码规模降低超过30%，而性能的损失却很小。由于LPC2210的144脚封装、极低的功耗、多个32位定时器、8路10位ADC、PWM输出以及多达9个外部中断使它们特别适用于工业控制、医疗系统、访问控制和POS机。通过配置总线，LPC2210最多可提供76个GPIO。由于内置了宽范围的串行通信接口，它们也非常适合于通信网关、协议转换器、嵌入式软modern以及其它各种类型的应用。
上传时间： 2013-11-13
上传用户：gut1234567
Design techniques for electronic systems areconstantly changing. In industries at the heart of thedigital revolution, this change is especially acute.Functional integration, dramatic increases incomplexity, new standards and protocols, costconstraints, and increased time-to-market pressureshave bolstered both the design challenges and theopportunities to develop modern electronic systems.One trend driving these changes is the increasedintegration of core logic with previously discretefunctions to achieve higher performance and morecompact board designs.
上传时间： 2014-12-28
上传用户：康郎
在现代通信系统中，电话语音的频带被限制在300 Hz～4 kHz的范围内，带来了语音可懂度和自然度的降低。为了在不增加额外成本的前提下提高语音的可懂度和自然度，进行了电话语音频带扩展的研究。提出了一种改进的基于码本映射的语音带宽扩展算法：在码本映射的过程中，使用加权系数来得到映射码本。客观测试结果表明，用此算法得到的宽带语音的谱失真度比用一般的码本映射降低至少2%。主观测试结果表明，用此算法得到的宽带语音具有更好的可懂度和自然度。 Abstract: In modern communication systems， the bandwidth of telephone speech is limited from 300Hz to 4 kHz， which reduces the intelligibility and naturalness of speech. Telephone speech bandwidth extension is researched to get wideband speech and to improve its intelligibility and naturalness， without increasing extra costs. This paper put forward an improved algorithm of speech bandwidth extension based on codebook mapping. In the process of codebook mapping， weighted coefficients were used to get mapping codebook. Objective tests show that spectral distortion of wideband speech obtained by this algorithm reduces at least 2%， comparing to conditional codebook mapping. Subjective tests show that the wideband speech obtained by this algorithm has better intelligibility and naturalness.
上传时间： 2014-12-29
上传用户：15501536189
传感器技术作为信息科学的一个重要分支，与计算机技术、自动控制技术和通信技术等一起构成了信息技术的完整学科。在人类进入信息时代的今天，人们的一切社会活动都是以信息获取与信息转换为中心，传感器作为信息获取与信息转换的重要手段，是信息科学最前端的一个阵地，是实现信息化的基础技术之一。 “没有传感器就没有现代科学技术”的观点已为全世界所公认。以传感器为核心的检测系统就像神经和感官一样，源源不断地向人类提供宏观与微观世界的种种信息，成为人们认识自然、改造自然的有力工具。 传感器原理及应用全书分为十个章结： 1、传感器的基本特性 2、各类传统与新型传感器的工作原理与应用 （1）应变式传感器 （2）电感式传感器 （3）电容式传感器 （4）压电式传感器 （5）磁电式传感器 （6）光电式传感器 （7）半导体式传感器 （8）波与辐射式传感器 （9）数字式传感器（自学） （10）智能式传感器（自学） 课程教材 1.郁有文等编著，传感器原理及工程应用，西安科技大学出版社，2008 2.沈跃、杨喜峰编，物理实验教程—智能检测技术实验，中国石油大学出版社，2010 课程参考书 1. 传感器与检测技术，胡向东等编著，机械工业出版社，2009 2. 传感器原理及应用，王化祥编著，天津大学出版社，2007 3. 传感技术与应用教程，张洪润等编著，清华大学出版社，2009 4. 传感器原理及应用（项目式教学），于彤编著，机械工业出版社，2008 5. 传感器与测试技术，叶湘滨等编著，国防工业出版社，2007 6. 传感器与检测技术，陈杰、黄鸿编著，高等教育出版社，2003 7. Handbook of Modern Sensors(3rd Edition)，Jacob Fraden，Springer-Verlag,Inc.，2004 课程性质 课程属于专业基础课，在专业人才培养中具有提高学生相关专业基础理论的认知能力、增强学生从事传感与检测技术研究与应用工作的适应能力和开发创新能力的作用。 研究对象 传感器技术的基本概念和理论、常用传感器的工作原理和应用技术。 学习目的与要求 （1）建立传感器技术的整体概念； （2）掌握传感器技术的基本理论、常用传感器的工作原理和应用技术； （3）获得应用传感器设计、组建测控系统的基本技能； （4）培养学生进一步学习、研究和应用传感器技术的兴趣； （5）为学习后续课程和独力解决实际问题打下必要的基础。 主要考核目标（包括重点及难点） （1）掌握传感器的基本概念和基本特性； （2）掌握常用传感器的工作原理（实验方法）； （3）掌握常用传感器的基本应用（实验技术）； （4）了解应用传感器设计、组建测控系统的基本方法； （5）了解传感器技术的发展前沿和趋势。 重点：传感器的工作原理 难点：传感器的应用技术； 内容涉及知识面广，理论性、综合性和实践性强。
上传时间： 2013-11-13
上传用户：yqs138168
The main objective of this book is to present all the relevant informationrequired for RF and micro-wave power amplifier design includingwell-known and novel theoretical approaches and practical design techniquesas well as to suggest optimum design approaches effectively combininganalytical calculations and computer-aided design. This bookcan also be very useful for lecturing to promote the analytical way ofthinking with practical verification by making a bridge between theoryand practice of RF and microwave engineering. As it often happens, anew result is the well-forgotten old one. Therefore, the demonstrationof not only new results based on new technologies or circuit schematicsis given, but some sufficiently old ideas or approaches are also introduced,that could be very useful in modern practice or could contributeto appearance of new ideas or schematic techniques.
标签： Amplifier Microwave Design Power
上传时间： 2013-12-22
上传用户：vodssv
Abstract: High-speed and low-speed data converters serve critical functions in modern broadband mobile radios. This application note outlines how todetermine high-speed data converter performance requirements in baseband sampling radio architectures. Also, system partition strategies andadvantages are outlined when considering a high-speed analog front-end (AFE) solution.
上传时间： 2013-11-02
上传用户：jjj0202
Radio frequency (RF) can be a complex subject to navigate, but it does not have to be. If you are just getting started with radios or maybe you cannot find that old reference book about antenna aperture, this guide can help. It is intended to provide a basic understanding of RF technology, as well act as a quick reference for those who “know their stuff” but may be looking to brush up on that one niche term that they never quite understood. This document is also a useful reference for Maxim’s products and data sheets, an index to deeper analysis found in our application notes, and a general reference for all things RF.
上传时间： 2013-10-23
上传用户：685
