VHDL设计的功能齐全的交通灯程序，经过仿真一切功能符合要求。...

pll(phase locked loop) is used to fix the circuit to particular frequency

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)

增强型8051的VHDL源代码，两个周期执行一条指令，仿真工具为Modelsim，开发板为Altera的EP1C20开发板-enhanced 8051 VHDL source code, the implementation of a two-cycle instruction, simulation tools for Modelsim, development board for the Altera EP1C20 development board

Interfacing RTC with spartan 3

调制解调器是在发送端通过调制将数字信号转换成模拟信号，而在接收端通过解调将模拟信号转换为数字信号的一种装置。这个程序用VHDL语言编写，实现了二进制振幅键控（2ASK）的调制与解调；二进制频移键控（2FSK）的调制与解调，二进制相位键控（2PSK）的调制与解调过程。

ac97 VHDL core

verilog代码实现的数字密码锁。通过4个并行的10位移位寄存器，分别记录在时钟上升沿时A,B,C,D的输入情况，比如某上升沿输入A，相应时刻A对应的移位寄存器输入1，其他三个移位寄存器输入都为0.另外4个并行的10位寄存器记录密码。这样，密码锁不仅可以识别字符数量，还可以判断出字符的输入次序。(verilog code of digital lock. By four parallel 10-bit shift register, respectively, recorded in the clock rising edge A, B, C, D of inputs, such as a rising edge of input A, the corresponding moments A 1 corresponding to the input shift register, the other three shift bit register inputs are 0. another four parallel 10-bit registers record the password. This lock can not only identify the number of characters, you can also determine the character of the input sequence.)

512阶高速FIR成型滤波器，四相位复用，树形加法和多级流水线结构。(512-order high-speed FIR shaping filter, four-phase re-use, tree addition and multi-stage pipeline structure.)

用verilog HDL语言，通过一个4位移位寄存器实现一个信号转化为HDB3码并进行测试 -Using verilog HDL language, through a 4-bit shift register realization of a signal into HDB3 code and test

伪随机m序列VHDL代码，生成多项式为1+x+x^7 (203)，包括代码文件.vhd和模块文件.bsf以及仿真波形，可直接添加到工程中使用。