VHDL的基本程序，可以用来驱动键盘，功能强大，虽然和基础

nseval - Object evaluation, includes control method execution.

在数字通信中，通常直接从接收到的数字信号中提取位同步信号，这种直接法按其提取同步信号的方式，大致可分为滤波法和锁相法。锁相法是指利用锁相环来提取位同步信号的方法，本设计方案就是基于锁相环的位同步提取方法，能够比较快速地提取位同步时钟，并且设计简单，方便修改参数。采用Quartus II设计软件对系统进行了仿真试验，并用Altera的Cyclone II系列FPGA芯片Ep2c5予以实现。(In digital communication, usually from receiving directly in digital signal extracted a synchronized signal, the direct method according to the extraction synchronized signal way, can be roughly divided into filtering method and phase lock method. Phase lock method is using of phase locked loop to extract a synchronized signal method, the design scheme is based on phase locked loop of a synchronous extraction method and can be quickly extract a synchronous clock, and design simple, convenient modification parameter. The Quartus II design software of the system, and the simulation test Altera Cyclone II FPGA chip to achieve Ep2c5 series.)

ＦＰＧＡ设计中的一些经典例子对学习ＦＰＧＡ的人会有帮助-FPGA design of some of the classic examples of people learning FPGA would be helpful

东芝ccd产品tcd1209驱动程序，生成1209所需的驱动波形(toshiba ccd tcd1209 )

verilog HDL经典的入门书籍，内容很详细，讲了许多实例，适合硬件描述语言初学者。(verilog HDL classic introductory book, the content is very detailed, spoke many instances, suitable hardware description language for beginners.)

1602是目前最常用的显示器件，本例是通过verilog 代码实现1602的显示(1602 display)

全数字OQPSK解调算法的研究及FPGA实现 论文介绍了OQPSK全数字接收解调原理和基于 软件无线电设计思想的全数字接收机的基本结构，详细阐述了当今OQPSK数字 解调中载波频率同步、载波相位同步、时钟同步和数据帧同步的一些常用算法， 并选择了相应算法构建了三种系统级的实现方案。通过MATLAB对解调方案的 仿真和性能分析，确定了FPGA中的系统实现方案。在此基础上，本文采用Verilog HDL硬件描述语言在Altera公司的QuartusⅡ开发平台上设计了同步解调系统中 的各个模块，还对各模块和整个系统在ModelSim中进行了时序仿真验证，并对 设计中出现的问题进行了修正。最后，经过FPGA调试工具嵌入式逻辑分析仪 SignalTapⅡ的硬件实际测试，(The Research and FPGA Implement of All Digital OQPSK Demodulation Algorithms )

讲述了全数字信号发生器部分频率值测算的表格(Full digital signal generator frequency value calculation form )

IC的设计可以分为两个部分，分别为：前端设计（也称逻辑设计）和后端设计（也称物理设计），这两个部分并没有统一严格的界限，凡涉及到与工艺有关的设计可称为后端设计。(The design of IC can be divided into two parts: front-end design (also called logic design) and back-end design (also known as physical design). These two parts do not have a uniform and strict boundary, and the design related to process can be called back-end design.)

用walsh算法实现的符号数乘法器,asic流片时,可以不用公司的付费乘法器的ip core.-algorithm using the symbols multiplier, HDL-piece quantities. it is not necessary for the company"s paid Multiplier ip core.