this come from alter ,you can look and find it on line about USB

本文以FPGA为硬件平台，基于EDA工具QUARTUSⅡ为软件平台上对HDB3编/译码进行实现。由于在EDA的软件平台QUARTUSⅡ上不能处理双极性的信号，因此对HDB3码的编/译码的实现分为：软件部分和硬件部分。软件部分是基于QUARTUSⅡ的平台上对输入的码元进行编码和译码，通过系统仿真，验证了HDB3码的编译码的正确性；硬件部分采用CD74HC4052双四选一的数模选择器实现单极性到双极性的转换；采用AD790和SE5539实现双极性到单极性的转换。最后，通过仿真，验证了方案的正确性。

ALTERA官方板子DE2官方代码，芯片是EP2C35F672C6N(ALTERA official board DE2 official code, the chip is EP2C35F672C6N)

msk的verilog程序 利用ＦＰＧＡ实现-MSK procedures for the use of Verilog FPGA realize

本实验是用LCD12864显示英文 显示 Our FPGA EDA NIOS II SOPC FPGA(This experiment is shown in English with LCD12864 display Our FPGA EDA NIOS II SOPC FPGA)

说明：  document qpsk vhdl code

高级FPGA设计__结构、实现和优化,中文翻译版(Advanced FPGA Design- Architecture, Implementation, and Optimization)

VHDL描述的跑马灯程序，用于初学者练习-Marquee procedures described in VHDL, for beginners to practice

acousting fingerprint enhancement

介绍了在数字语音通信中, 利用在系统可编程技术和复杂可编程逻辑器件CPLD, 实现了数字语音的复接和分接 对于其中的单稳态电路的数字化和数字锁相环提取位同步信号也进行了详细的设计说明。实际应用结果表明, 系统工作稳 定可靠, 设计是成功的。(Describes the digital voice communications, the use of in-system programmable technical and complex programmable logic device CPLD, to achieve the digital voice multiplexer and demultiplexer for the single steady state in which the digital circuit and digital phase locked loop extraction bit synchronization signals are also carried out a detailed design specification. The practical application results show that the system works stable and reliable design is successful.)

sin波形发生图形，应用智能老师款到即发了快速打击 (sin waveform generation graphics application smart teacher paragraph to that made a rapid strike)