because
共 193 篇文章
because 相关的电子技术资料，包括技术文档、应用笔记、电路设计、代码示例等，共 193 篇文章，持续更新中。
With the release of PHP 5 web developers need a guide to developing with PHP 5 to both learn its com
With the release of PHP 5 web developers need a guide to developing with PHP 5 to both learn its complex new features and more fully implement the long-standing features on which PHP s success is buil
Embedded computer systems permeate all aspects of our daily lives. Alarm clocks, coffee makers, di
Embedded computer systems permeate all aspects of our daily lives.
Alarm clocks, coffee makers, digital watches, cell phones, and automobiles
are just a few of the devices that make use of embedde
In the previous article, we presented an approach for capturing similarity between words that was co
In the previous article, we presented an approach for capturing similarity between words that was concerned with the syntactic similarity of two strings. Today we are back to discuss another approach
The code is fairly straightforward, except perhaps for the call to convertColumnIndexToModel. That c
The code is fairly straightforward, except perhaps for the call to convertColumnIndexToModel. That call is necessary because if the user moves the columns around, the view s index for the column doesn
基于MSP430F247和TMP275的测温仪
介绍了一种TI公司最新推出的MSP430F247单片机，利用它自带的I2C模块驱动I2C总线的温度传感器TMP275。TMP275是一款具有高精度、低功耗的新型温度传感器。由于TMP275具有可编程功能，纤小的封装以及极大的温度范围，因而广泛应用于组建超小型温度测量装置。
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<DT>Abstract:
<DD> A new single ch
As all of you know, MATLAB is a powerful engineering language. Because of some limitation, some task
As all of you know, MATLAB is a powerful engineering language. Because of some limitation, some tasks take very long time to proceed. Also MATLAB is an interpreter not a compiler. For this reason, exe
Commercially available active noise control headphones rely on fixed analog controllers to drive "an
Commercially available active noise control headphones rely on fixed analog controllers to drive "anti-noise" loudspeakers. Our design uses an adaptive controller to optimally cancel unwanted acoustic
μC/OS-II Goals Probably the most important goal of μC/OS-II was to make it backward compatible with
μC/OS-II Goals
Probably the most important goal of μC/OS-II was to make it backward compatible with μC/OS (at least from an
application’s standpoint). A μC/OS port might need to be modified to work
ST7529液晶驱动 The ST7529 is a driver & controller LSI for 32 gray scale graphic dot-matrix liquid cryst
ST7529液晶驱动 The ST7529 is a driver & controller LSI for 32 gray scale graphic dot-matrix liquid crystal display systems. It generates 255
Segment and 160 Common driver circuits. This chip is connected
this is a Implementation of a B* tree,not yet completed, because I need help for this task.
this is a Implementation of a B* tree,not yet completed, because I need help for this task.
These three articles involves the combination of wavelet and MCTF. MCTF means motion-compensated-tim
These three articles involves the combination of wavelet and MCTF. MCTF means motion-compensated-time-filter. It makes wavelet transform more popular because of the high compression efficiency.
XAPP440 - Xilinx CPLD的上电性能
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Applying power to a standard logic chip, SRAM, or EPROM, usually results in output pinstracking the applied voltage as it rises. Programmable logic attempts to emulate that behavior,but physics
在单端应用中采用差分I/O放大器
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Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage,
快速跳频通信系统同步技术研究
同步技术是跳频通信系统的关键技术之一，尤其是在快速跳频通信系统中，常规跳频通信通过同步字头携带相关码的方法来实现同步，但对于快跳频来说，由于是一跳或者多跳传输一个调制符号，难以携带相关码。对此引入双跳频图案方法，提出了一种适用于快速跳频通信系统的同步方案。采用短码携带同步信息，克服了快速跳频难以携带相关码的困难。分析了同步性能，仿真结果表明该方案同步时间短、虚警概率低、捕获概率高，同步性能可靠。
基于单DSP的VoIP模拟电话适配器研究与实现
<P>基于单DSP的VoIP模拟电话适配器研究与实现:提出和实现了一种新颖的基于单个通用数字信号处理器(DSP)的VoIP模拟电话适配器方案。DSP的I/O和存储资源非常有限，通常适于运算密集型应用，不适宜控制密集型应用[5]。该系统高效利用单DSP的I/O和片内外存储器资源，采用μC/OS-II嵌入式实时操作系统，支持SIP和TCP-UDP/IP协议，通过LAN或者宽带接入，使普通电话机成为In
谈集成电路的通用接口
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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 mi
信号源,调节器和电源电路分析
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Occasionally, we are tasked with designing circuitry for aspecific purpose. The request may have customer originsor it may be an in-house requirement. Alternately, a circuitmay
XL6003 300KHz 36V Boost 3W LED
The XL6003 regulator is fixed frequency PWM Boost (step-up) DC/DC converter, capable of<BR>driving 1050mA load current with excellent line and load regulation. The regulator is simple to use because i
陶瓷输入电容可导致过压瞬变
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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 siz
水位监测报警系统原理
<P>摘要：本水位监测报警器使用5V低压直流电源（也可以用3节5号电池代替）就可以对5~15厘米的水位进行监测，用LED显示和数码管显示水位，并可以对不再此范围内的水位发出报警。主要采用CD4066、74LS86、74LS32、CD4511芯片，再加上数码管、蜂鸣器、发光二极管、电阻这些器件组成一个简单而灵敏的监测报警电路，操作简单，接通电源即可工作。因为大部分电路采用数字电路，所以本水位监测报警