四进制计数器模块，使用VHDL语言编写，在ISE8.1中经过测试的模型...

FFT的MATLAB实现。非常完整的实现FFT过程，速度很快。(The FFT in MATLAB. Contains more than one source, the FFT process. Learning Reference essential)

等精度测试频率计，包括程序源代码以及相关注释-Precision test frequency meter, etc., including source code and related comments ......

说明：  Verilog简易教程，或者说是讲义，清晰易懂，适合初学者入门使用(Layman' s Guide to Verilog, or a lecture, legible entry to use for beginners)

ASIC设计中常用的运算模块，如加减，常系数乘法，截断，饱和等。(some modules used in ASIC design.)

fpga的RS485代码,非常容易，适合学习(the code of rs485 in fpga, very easy,suitable for learning)

流水线乘法器与加法器 开发环境：Modelsim（verilog hdl）(Multiplier and adder pipeline development environment: Modelsim (verilog hdl))

说明：  环路滤波器是通信信号调制解调中最重要的一个部分，环路滤波器设计的好坏将直接影响到接收机的性能指标，二阶锁频辅助三阶锁相环路滤波器可以稳定跟踪具有加加速度的信号源，是现代通信中非常实用的技术，本文中详细编写了单载波信号产生模块、信道噪声模块、数字正交下变频模块、鉴频鉴相模块、环路滤波器模块，并包含了完整的testbench模块，对于初学者非常有用。(Loop filter is the most important part of communication signal modulation and demodulation. The design of loop filter will directly affect the performance index of receiver. The second-order frequency locking assisted third-order phase-locked loop filter can stably track the signal source with acceleration speed, which is a very practical technology in modern communication. In this paper, the single carrier signal generation module and channel noise are written in detail Sound module, digital orthogonal down conversion module, frequency and phase detection module, loop filter module, and contains a complete testbench module, which is very useful for beginners.)

异步FIFO 输入: 16bit 输出:16bit 深度:256(Asynchronous FIFO Input: 16bit Output: 16bit Depth: 256)

一个简单的微处理器的实现，能够进行几种常见的操作，对于熟悉计算机的工作原理很有帮助，并且附有详细的设计报告和设计思路。在word文档最后给出了源代码。-a simple microprocessor to achieve, for several common to the operation of the computer for those familiar with the working principle helpful, and with the detailed design reports and design ideas. The word is the final document source code.

H264/AVS中的离散余弦变换DCT以及反离散余弦变换IDCT的Verilog代码(H264/AVS the discrete cosine transform and inverse discrete cosine transform DCT IDCT of Verilog code)