C++ Algorithms for Digital Signal Processing 第4章 滤波器程序
标签： Algorithms Processing Digital Signal
上传时间： 2013-08-01
上传用户：eeworm
差分信号（Differential Signal）在高速电路设计中的应用越来越广泛，差分线大多为电路中最关键的信号，差分线布线的好坏直接影响到PCB板子信号质量。
标签： Differential Allegro Signal 差分信号
上传时间： 2013-09-04
上传用户：jennyzai
All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL components (e.g. 74LS series: gates 1V/us, clock inputs 20V/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.For input signals, which do not provide the required rise/fall times, external circuitry mustbe used to shape the signal transitions.In the attached diagram, the effect of the sample rate is shown. The numbers 1 to 5 in thediagram represent possible sample points. Waveform a) shows the result if the inputsignal transition time through the undefined TTL-level area is less than the time distancebetween the sample points (sampling at 1, 2, 3, and 4). Waveform b) can be the result ifthe sampling is performed more than once within the undefined area (sampling at 1, 2, 5,3, and 4).Sample points:1. Evaluation of the signal clearly results in a low level2. Either a low or a high level can be sampled here. If low is sampled, no transition willbe detected. If the sample results in a high level, a transition is detected, and anappropriate action (e.g. capture) might take place.3. Evaluation here clearly results in a high level. If the previous sample 2) had alreadydetected a high, there is no change. If the previous sample 2) showed a low, atransition from low to high is detected now.
上传时间： 2013-10-23
上传用户：copu
用系统调用signal()让父进程捕捉键盘上来的中断信号（按Ctrl-C键）；当捕捉到中断信号后，父进程用系统调用kill()向两个子进程发出信号，子进程捕捉到信号后分别输出下列信息后终止： Child Process 1 is Killed by Parent! Child Process 2 is Killed by Parent! 父进程等待两个子进程终止后，输出如下的信息后终止： Parent Process is Killed!
上传时间： 2015-02-27
上传用户：ywqaxiwang
实时信号处理（(eWiley) Real-Time Digital Signal Processing）很好的教材
标签： Processing Real-Time Digital eWiley
上传时间： 2014-01-18
上传用户：Late_Li
Generation of a Sine Wave Using a TMS320C54x Digital Signal Processor
标签： Generation Processor Digital Signal
上传时间： 2015-03-04
上传用户：asdkin
文章描述了TMS320C6000 digital signal processors (DSPs)的CPU结构、管道技术、指令系统.
标签： processors digital signal C6000
上传时间： 2015-03-15
上传用户：wangdean1101
"DIGITAL SIGNAL PROCESSING WITH C AND THE TMS32 0C30"一书的附带程序，几乎包括所有数字信号处理的基本算法，很不错的源程序，可以加深对数字信号处理的理解
标签： PROCESSING DIGITAL SIGNAL 0C30
上传时间： 2015-03-17
上传用户：asddsd
关于matlab与digital signal的几个源程序。具体内容请自己下载看！
上传时间： 2015-04-12
上传用户：aix008
Fundamentals of Digital Signal Processing using MATLAB 教材的matlab原代码
标签： Fundamentals Processing Digital Signal
上传时间： 2015-04-18
上传用户：change0329
