递增方式在4位数码管上向上计数显示从0000

verilog实现的“六进制约翰逊计数器”。(verilog implementation of the " six hexadecimal Johnson counters." )

FFT with fix point 2*N

Verilog HDL__.rar 简要教程，很有用-Verilog HDL__.rar a brief tutorial, very useful

上海交通大学电子信息与电气工程学院VHDL经典教程-Shanghai Jiaotong University Electronic Information and Electrical Engineering, Institute of Classical VHDL Tutorial

中值滤波实现。选择在Vivado软件上采用Verilog语言来编写中值滤波算法，搭建出完整的数据处理系统架构，通过仿真和验证来判断数据的处理效果，并在实际的设计过程中根据出现的问题提出解决方案。(Median filter implementation. The author chose Verilog language to write the median filter algorithm in Vivado software, built a complete data processing system architecture, judged the data processing effect through simulation and verification, and proposed a solution according to the problems in the actual design process.)

很不容易找到的资料，基于VHDL的频率计设计 希望有用-Not easy to find information on the frequency meter based on the VHDL design seek to help

说明：  Implementing QPSK using DSS

能产生正弦波、三角波、方波和e指数衰减的扫频波，且相关参数可调(Can produce sine wave, triangle wave, square wave, and e exponential decay wave sweep and adjustable parameters)

说明：  内部含3个模块，使用DDS产生200k与500k的正弦波，两者相加后过数字低通滤波（通带0-200k，阻带400k以上），并将波形输出，实测FFT分析中看不到500k分量。其中数字滤波器采用MATLAB设计（FIR+等波纹，阻带衰减-80dB）(There are three modules in the system. DDS is used to generate 200K and 500K sine waves. After adding the two modules, the digital low-pass filter (passband 0-200k, stopband above 400k) is used, and the waveform is output. 500K component can not be seen in the actual FFT analysis. The digital filter is designed by MATLAB (FIR + equal ripple, stopband attenuation - 80dB))

CSS配合jquery制作完美漂亮的时钟，貌似在IE8下时钟不能获取时间啊！支持ie9、chrome、safari、firefox、opera （Chrome显示效果最佳，IE9下时钟无法工作）日历和骰子是原创，CSS3时钟并非原创但经过改良支持opera。数字日历的兼容性不错，圆形时钟就差点了，也希望一起交流，共同改进。(CSS with the jquery make perfect beautiful clock, seemingly in IE8 under the clock can not get the time ah! Support ie9, chrome, safari, firefox, opera (Chrome show the best results, the clock does not work under IE9) calendar and dice is original, CSS3 clock is not original but after improved support opera. Digital calendar compatibility is good, almost round the clock on, and also hope together, and work together to improve.)