该PPT是一个内部教学资料，想学习EDA技术的朋友可以看看这个教学资料。...

直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)

半带滤波器，用于sigma-delta DAC中的设计(Half-band filter for sigma-delta DAC design)

cache，实现了部分简单指令，仿真模拟确认可行(Single-cycle CPU, to achieve some simple instruction, simulation confirm feasible)

说明：  此程序用来实现图像的采集和帧数的计算功能。(Image acquisition and calculation of the number of frames.)

2FSK的matlab仿真，叠加了高斯白噪声(2FSK matlab simulation, superimposed on a Gaussian white noise)

用verilog编写的I2C——E2PROM模型。适用于各种型号的E2PROM，代码内部有参数可选。(Written in verilog I2C- E2PROM model. E2PROM, the internal code applicable to various types of optional parameters.)

用vhdl编写的简易电子中设计，经过测试成功，且用记事本上载，无需阅读器进行阅读。-Use of VHDL in the preparation of simple electronic design, has been tested successfully, and use Notepad to upload without reader reading.

Code VHDL for control VGA FPGA: Xilinx, Altera

说明：  关于一个8位处理器的分析，和源代码，VHDL语言设计，经过测试(on an eight processors, and source code, VHDL design, the test)

dataflow muliplexer in FPGA