电子技术
电子发烧友网本栏目为大家展示最热门的电子技术行业动态,最精准的电子技术新闻,是您了解电子技术最新技术和动态的最好网络平台。电子显示器比较-Electronic Displays Co
Abstract: This note compares advantages and disadvantages of Cathode Ray Tubes, Electro-Luminescent, Flip-Dot, Incandescent Light Bulbs, Liquid Crystal, Light Emitting Diode, Organic LEDs, Polymer LEDs, Glow Discharge, Plasma Display Panel...
2009-05-04 583
看门狗提高系统可靠性,如何选择正确的部分-Watchdogs
Abstract: Watchdog timers are used to monitor and minimize code execution errors. Internal watchdog timers are subject to code execution problems, making external watchdog circuits invaluable in preventing system lockup.This docume...
2009-05-04 1973
内部与外部看门狗定时器的比较
摘要:本文对内部(集成在处理器内部)看门狗定时器(WTD)与外部(基于硬件) WDT的优势和劣势进行了对比。内部看门狗便于设计,但容易失效。MAXQ2000微控制器的WDT可以作为内部看门狗...
2009-05-02 4392
Battery-Charger PWM Input Has
Abstract: Adding watchdog protection to the charger-input circuitry of a mobile phone guards against damage when the baseband processor stalls or ceases software execution. Mobile-phone batteries are usually charged throu...
2009-04-30 994
Moving-Coil Meter Measures Low
Abstract: The MAX4172 IC substitutes a current amplifier for the shunt normally associated with a moving-coil meter. This circuit allows use of the moving-coil meter, even when the meter current is a large fraction of the current being mea...
2009-04-28 857
DS1847/DS1848温度系数补编-DS1847/DS1
Abstract: Abstract: Both the DS1847 and DS1848 feature two 256-position digital resistors and lookup tables (LUT) to automatically adjust the resistance over a temperature range of -40°C to 95°C. The DS1848 also features 128 bytes of use...
2009-04-28 1040
利用开关电容滤波器实现抗混叠滤波
摘要:带外杂散信号所引起的混叠现象是A/D转换器应用中所面临的关键问题,如果没有适当的滤波处理,这些信号会严重影响数据转换系统的性能指标。本文主要讨论抗混叠滤波的...
2009-04-25 545
Coherent Sampling vs. Window S
Abstract: One of the most useful techniques for evaluating the dynamic performance of fast and ultra-fast data converters is coherent sampling. This technique increases the spectral resolution of a Fast Fourier Transform (FFT) and eliminat...
2009-04-25 790
伽玛光子辐射探测器-Gamma-Photon Radiati
Abstract: A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma radiation. The schematic, design considerations and component selection are discussed. The circuit of Figu...
2009-04-24 1422
从机械式电位器升级到数字电位器
摘要:数字电位器与机械式电位器相比具有许多优势,例如,具有更低的系统成本、能够改善系统的可靠性以及提高系统的灵活性等。本文介绍了使用数字电位器的优、缺点,并对...
2009-04-24 2078
Package Thermal Resistance Val
Abstract: Two common thermal-resistance values measured for IC packages are junction to ambient (Theta JA) and junction to case (Theta JC). These parameters are useful for calculating maximum power dissipation and self-heating, and for com...
2009-04-24 1793
Tarari “即插即用型”电路板解决方案, 经济有效地解决
LSI 公司日前宣布推出四系列全新 Tarari “即插即用型” 内容与安全处理器电路板,旨在满足从入门级到高性能网络的深层数据包检测要求。这些全新的解决方案采...
2009-04-24 550
CMET2009中国国际医疗电子技术大会盛况空前
CMET2009中国国际医疗电子技术大会盛况空前 4月22日,由创意时代主办的2009中国国际医疗电子大会(CMET2009)在深圳隆重召开,作为...
2009-04-23 534
利用MAXQ2000设计电压表
摘要:本应用笔记演示了如何配置MAXQ2000微控制器实现简单的电压表设计。该应用采用MAXQ2000评估板,其中包括4½位段式LCD显示器和MAX1407数据采集系统(DAS)以及一对外部电阻。MAXQ...
2009-04-23 777
构建基于MAXQ的“学习型”遥控器
摘要:消费类娱乐设备的红外线(IR)遥控器所造成的混乱状况似乎已经成为全球每个家庭所关注的问题。利用MAXQ2000微控制器和一些便宜的元器件,可以构建一个能够“学习”其它遥...
2009-04-23 893
使用高速Micro看门狗定时器
Abstract: Designers of high-speed microcontroller applications used in harsh environments will use watchdog timers to prevent out-of-control software. The DS80C320 high-speed micro has an integrated watchdog timer, eliminating the need for...
2009-04-23 708
使用看门狗/报警计数器的DS1371和DS1374实时时钟-
Abstract: Dallas Semiconductor offers two real-time clocks (RTCs), the DS1371 and DS1374, that utilize a 32-bit counter to maintain time. Both devices also provide a 24-bit count down watchdog/alarm counter that can provide one of three fu...
2009-04-23 1046
NXP将集成Adobe数字家庭Flash平台至其机顶盒平台中
恩智浦半导体(NXP Semiconductors,由飞利浦成立的独立半导体公司)宣布其将支持Adobe针对数字家庭所推出的 Flash 平台。这项专门针对连接了互联网的电视机、机顶盒(STB)、蓝光播...
2009-04-23 550
PSoC CapSense打造雅致触摸界面,为白色家电添姿彩
PSoC CapSense打造雅致触摸界面,为白色家电添姿彩 赛普拉斯日前宣布,Indesit 公司在其 Hotpoint-Ariston Aqualtis LCD 系列洗衣机产品中采用赛普拉斯 PSoC CapSense 解决方案打造优雅精...
2009-04-23 581
转换器提升一个电池的电压为50V-Converter Boo
Abstract: Cascading two step-up switching converters boosts a low voltage (as low as 0.9V) to 50V. Handheld instruments often require a voltage far above the internal analog supply rail. The circuit of Figure 1 can derive...
2009-04-22 792
硅扩频振荡器在汽车电子产品中的应用
摘要:数字电子系统使我们的生活丰富多彩,但数字时钟信号也扮演着“反面角色”,即传导噪声源(通过电缆)或电磁辐射干扰(EMI)。由于潜在的噪声问题,电子产品需要经过相关标...
2009-04-22 526
PCI Express x16图形至150W - ATX板型
Abstract: The PCI Express x16 Graphics 150W-ATX Specification establishes detailed power-supply management requirements for PC-graphics add-in cards. Designing a discrete solution to satisfy these requirements can add considerable cost and...
2009-04-22 1875
ESD保护I/O端口-ESD Protection for
Abstract: This application note describes how ESD threatens electronic systems, type of damage inflicted, how ESD is generated, test methods and waveforms used, human body and machine models for testing, IEC compliance levels, contact and ...
2009-04-22 2938
Maxim Leads the Way in ESD Pro
Abstract: This application note describes how ESD threatens electronic systems, type of damage inflicted, how ESD is generated, test methods and waveforms used, human body and machine models for testing, IEC compliance levels, contact and ...
2009-04-22 431
积极高压瞬态保护特朗普传统方法在汽车电子领域中的应用-Act
Abstract: Most vehicle electronic systems require overvoltage, reverse-battery, and transient protection. The use of active protectors for these purposes offers substantial advantages in power dissipation, optimization of the operating vol...
2009-04-22 1941
原型与表面贴装器件-Prototyping with Sur
Abstract: Surface mount devices can often be prototyped without etched PCBs by using plain copperclad and simple cutting tools. As surface-mount technology (SMT) has become more prevalent (and many devices are only availa...
2009-04-21 1047
Practical Aspects of EMI Prote
More and more aspects of our lives depend on the uninterrupted operation of electronic equipment and appliances. "Drive by wire" and "fly by wire" have become everyday realities. In automated plants especially, electronic equipment that fa...
2009-04-21 995
理解物理拓扑结构的稳压器是用于EMI和EMC设计
理解物理拓扑结构的稳压器是用于EMI和EMC设计 Abstract: Understanding the physics of voltage regulator topologies is important in designing power systems for EMI and EMC compliance...
2009-04-21 1337
介绍常见的印刷电路输电线路-Introduction to
Abstract: At high frequencies (e.g. microwave) the physical dimensions of printed circuit board (PCB) traces become significant relative to the wavelength of the signal. At these frequencies, controlled impedance transmission lines are use...
2009-04-21 996
开关型调节器的电路板布局技术
摘要:本文介绍了开关型调节器的电路板布局的基本原则。尽管本文集中分析的是升压型开关型调节器,但它所包含的原理同样适合其它类型的开关调节器。本文讨论了接地方法、...
2009-04-21 473
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