fir滤波器

DDR2控制器设计原码,可以在FPGA上测试通过,并对外部的ddr memory进行读写访问.(DDR2 controller design of the original code, can be tested through the FPGA, and external ddr memory read and write access.)

说明：  用FPGA实现8点fft，整个代码使用verilog编写，主要运用了加法器和乘法器，简单易懂(8-point FFT with FPGA, The whole code is written by Verilog, mainly using adder and multiplier, which is easy to understand)

Laurent程序,用于CPM信号的调制,接收和分解,译码,以及判断(Laurent procedures for CPM modulation of the signal, and decomposition receiving, decoding, and to determine)

说明：  MATLAB to HDL Code conversion

说明：  amba总线桥:ahb to asb!verilog hdl文档加代码，非常全，soc(amba bus bridge: ahb to asb! verilog hdl code for the document plus a very full, soc)

针对兆瓦级风电并网逆变器主电路研制中存在的并联扩容、开关频率较低和LCL滤波器难以优化设计等问题，提出了采用交流侧串接电感再进行并联的均流方案，采用载波移相技术提高变流器的等效开关频率，提出了LCL滤波器的设计原则，并给出了上述设计的理论依据和实现方法。通过对2兆瓦风电变流器主电路的仿真验证了上述技术方案。(MW-class wind power for grid-inverter main circuit of the parallel development of existing capacity, a lower switching frequency and LCL filter design difficult to optimize the problem, a series inductor AC side in parallel are further flow program, the use of carrier phase-shifting technology to enhance the equivalent converter switching frequency, a LCL filter design principles, and gives the above-mentioned theoretical basis for the design and implementation. 2 MW of wind power converter main circuit simulation program to verify the above-mentioned technology.)

基于ad7470，ad5331的数模转换和模数转换的采集系统，已通过modelsim和quartus验证，输入0到2.5v的正弦波波形，转换输出通过采集卡的波形基本类似。

FPGA的简单程序，关于有限状态机的设计与实现，可以让大家快速地对verilog开发有基本的认知

verilog编写的DAC2902程序，用于高速的数模转换(verilog language,using for DAC2902 digital analog converter)

An universal shift register performs the following tasks load, right shift ,left shift and parallel load as the selection inputs are 00,01,10,11 respectively. Such a register is implemented here in Quartus.