基于PXA270-S linux的FPGA实现。\r\n向LED_CONTROL写入n即得到n*0.1S的延时，LED闪烁的快慢程度发生变化。
上传时间： 2013-08-22
上传用户：tb_6877751
protel s help on line
上传时间： 2013-09-18
上传用户：iswlkje
Many CAD users dismiss schematic capture as a necessary evil in the process of creating\r\nPCB layout but we have always disputed this point of view. With PCB layout now offering\r\nautomation of both component placement and track routing, getting the des
标签： schematic necessary creating dismiss
上传时间： 2013-09-25
上传用户：baiom
针对传统的故障树分析法在故障诊断中存在的缺点和不足，文中将模糊理论运用到故障诊断中，提出基于T-S的模糊故障树的故障诊断法。介绍了T-S模糊模型及算法，建立了诊断系统的故障库和推理机。使设备操作和维修人员可及时发现故障，降低系统故障率，提高了保障的能力。
上传时间： 2013-10-20
上传用户：heheh
针对齿轮故障特征信号具有强噪声背景、非线性、非平稳性特点，提出采用形态梯度小波对齿轮振动信号进行降噪。首先使用形态梯度小波把齿轮振动信号分解到多个尺度上，然后对各层的细节系数进行软阈值方法降噪处理，对经过处理后的小波系数进行重构。对降噪后的齿轮振动信号采用S变换多分辨率时频分析，能够从具有良好的时频分辨率的S变换谱图提取齿轮故障特征。通过仿真试验和故障轴承的信号分析证明，该方法具有短时傅里叶变换和小波变换的优点，不存在Wigner-Ville分布的交叉干扰和负频率，能有效地提取隐含在噪声中的齿轮故障特征，适合齿轮故障的在线监测和诊断。
上传时间： 2013-11-01
上传用户：AISINI005
Abstract: It is incredible how many programmable logic controls (PLCs) around us make our modern life possible and pleasant.Machines in our homes heat and cool our air and water, as well as preserve and cook our food. This tutorial explains the importanceof PLCs, and describes how to choose component parts using the parametric tools on the Maxim's website.A similar version of this article was published February 29, 2012 in John Day's Automotive Electronic News.
上传时间： 2013-11-10
上传用户：liaocs77
首先把功率管的小信号S参数制成S2P文件,然后将其导入ADS软件中,在ADS中搭建功率管的输入输出端口匹配电路,按照最大增益目标对整个电路进行优化,最后完成电路的设计。
上传时间： 2013-10-21
上传用户：zhangfx728
Linear Technology’s High Frequency Product lineupincludes a variety of RF I/Q modulators. The purpose ofthis application note is to illustrate the circuits requiredto interface these modulators with several popular D/Aconverters. Such circuits typically are required to maximizethe voltage transfer from the DAC to the baseband inputsof the modulator, as well as provide some reconstructionfi ltering.
上传时间： 2013-10-19
上传用户：FreeSky
Highlights the LTC1062 as a lowpass filter in a phase lock loop. Describes how the loop's bandwidth can be increased and the VCO output jitter reduced when the LTC1062 is the loop filter. Compares it with a passive RC loop filter. Also discussed is the use of LTC1062 as simple bandpass and bandstop filter.
上传时间： 2013-10-24
上传用户：chens000
Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).
上传时间： 2013-11-13
上传用户：墙角有棵树
