xilinx的ISE工程，用CORDIC算法做DDS生成正弦波-xilinx the ISE project to do with the CORDIC algorithm generates sine DDS

altera cordic ip core, 包含文档，完整设计，以及测试向量-altera coedic ip core, including the document, whole design, and the testbench.

基于博创实验箱UP-CUP-FPGA2C35-Ⅱ和Verilog HDL硬件描述语言，分为按键输入模块、LED指示灯模块及LCD显示模块，采用按键BTN1、BTN2作为输入端输入四位密码与事先设定的密码进行匹配，由D1、D2、D3、D4四盏LED灯来指示输入密码的位数。开机时，LCD显示“HELLO! WELCOME!Enter the code:当”，密码输入正确时，LED灯D7亮，同时在实验箱LCD显示屏上显示字符串“Good! Well done!you are right!!!”，当密码

　　电源滤波器是由电容、电感和电阻组成的滤波电路。滤波器可以对电源线中特定频率的频点或该频点以外的频率进行有效滤除，得到一个特定频率的电源信号，或消除一个特定频率后的电源信号。(Power filter is composed of capacitance and inductance and resistance of filter circuit.Specific frequency of the filter to the power cord or the point that the