Analog Device ARM-7 系列之 ADuC_7024 Evaluation Board 内多个学习范例全都是基于 Keil 工程版的 范例,附 ADuC_7024 Evaluation Board 原理图,而范例内容如下: 1.ADC 2.Comp 3.DAC 4.FlashEE 5.FuncRam 6.INT 7.Mics 8.PLA 9.pulse 10.PWM 11.S&C 12.TimerTrig 13.UART 14.Varplace
标签： ADuC 7024 Evaluation Evaluati
上传时间： 2016-01-01
上传用户：lo25643
A new cable fault location method based on wavelet reconstruction is proposed. In this method the difference between the currents of faulty phase and sound phase under the high voltage pulse excitation is used as the measured signal and is decomposed in multi-scale by wavelet transform, then reconstructed in single scale. Comparing with traditional fault location method by travelling wave, the presented method will not be interfered by the reflected wave from the branch joint of cables or from other positions where the impedances are not matched and not be influenced by fault types, otherwise, the reflected waves can be recognized even the faulty position is near to the measuring terminal, at the same time, the influence of the wave speed uncertainty can be reduced. The correctness of the proposed method is proved by simulation results.
标签： method reconstruction location proposed
上传时间： 2016-02-04
上传用户：maizezhen
A digital fi‘equeney meter designed with FPGA development software Q-~us 11 is introduced．The 1 Hz—l MHz input measured pulse signals of the digital ii‘equency meter can be used for measuring frequency，period，pulse width and duty ratio，etc．The test results stably display O71 3 seven—segment numeric tubes，and the measuring ranges may be switched over automatically．The measuring error is equal to or less than 0．1％．
标签： development introduced designed software
上传时间： 2016-04-09
上传用户：stewart·
This example demonstrates the use of the ADC block and PWM blocks. The generated DSP code produces the pulse waveform whose duty cycle is changing as the voltage applied to ADC input changes. The waveform period is kept constant.
标签： demonstrates the generated produces
上传时间： 2016-05-17
上传用户：sjyy1001
The PWM_1 project is a simple program for the STM32F103RBT6 using Keil MCBSTM32 Evaluation Board and demonstrating the use of PWM (pulse Width Modulation) with Timer TIM4.
标签： Evaluation project program MCBSTM
上传时间： 2013-12-25
上传用户：familiarsmile
s3c2410提供了5个16位的Timer（Timer0~Timer4），其中Timer0~Timer3支持pulse Width Modulation—— PWM（脉宽调制 ）。Timer4是一个内部定时器（internal timer），
上传时间： 2013-12-16
上传用户：569342831
This m file simulates a differential phase shift keyed (DPSK) ultra wide bandwidth(UWB) system using a fifth derivative waveform equation of a Gaussian pulse.
标签： differential bandwidth simulates system
上传时间： 2014-01-03
上传用户：784533221
Modify the Gray-coded modulation example (COMMDOC_GRAY) so that it uses a pair of square root raised cosine filters to perform pulse shaping and matched filtering at the transmitter and receiver, respectively.
标签： COMMDOC_GRAY Gray-coded modulation example
上传时间： 2017-01-08
上传用户：zhangzhenyu
Tiny Planet is small device connected to a GSM cell phone. When the mobile receives a predefined SMS (text message), like "Activate burglar alarm" or "Start backup pump", the circuit automatically recognizes it as a command, and switches the output port accordingly. Besides switching the port on or off, the user can pulse it for a short period (e.g. 鈥淩eboot remote server鈥?.
标签： predefined connected receives Planet
上传时间： 2017-05-17
上传用户：fanboynet
摘 要 文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。 简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。 介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。 JPEG标准的特点是离散余弦变换。 比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
上传时间： 2013-12-25
上传用户：410805624
