关于基数分频技巧设计,基于VHDL语言,对实际设计有帮助

DDS的频率转换可以以近似认为是即时的，这是因为它的相位序列在时间上是离散的，在频率控制字改变之后，要经过一个时钟周期之后才能按照新的相位增量增加，所以也可以说它的频率转换时间就是频率控制字的传输时间，-DDS frequency conversion can be considered similar to real-time, this is because it is the phase sequence in time is discrete, in the frequency control word change after one clock cycle to go through before a new phase in accordance with the incremental increase, so it can be said of the frequency switching time is the frequency control word transmission time,

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 )

旋转LED 实现自适应转速 字幕滚动 对接的程序(Rotating LED Adaptive Speed ​ ​ subtitles scroll docking program)

轴系测试程序，多通道输入输出，实现时域、频域、轴心轨迹、瀑布图等功能。(Shafting test program, multi-channel input and output, to achieve time domain, frequency domain, orbit, waterfall and other functions.)

QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的Kay法(QPSK-carrier frequence offset estimation_ kay )

VHDL implementation using mouse and monitor

Cores are generated from Confluence a modern logic design language. Confluence is a simple, yet highly expressive language that compiles into Verilog, VHDL, and C

代码实现了一个由32位寄存器组成的寄存器组，并有多个控制输入和两个输出，方便使用。(The code implements a 32-bit register consisting of registers, and there are multiple control inputs and two outputs, easy to use.)

说明：  FPGA实现PLL锁相环，输出不同频率的时钟控制信号。(FPGA realizes PLL and outputs clock control signals of different frequencies.)

本书共由三篇组成。其中第一篇由第1~3章组成，介绍PCI总线的基础知识。第二篇 由第4~13章组成，介绍PCIExpress总线的相关概念。第二篇的内容以第一篇为基础。(This book comprises a total of three components. The first chapter from the first 1-3 chapters, introduces the basics of the PCI bus. Second by the first 4 to 13 chapters, introduces concepts related PCIExpress bus. The contents of the first to second basis.)