Simulation using VHDL language songs Andy Lau

说明：  直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)

三相PWM整流，实现功率双向流动,可保持直流侧电压稳定(three-phase PWM rectifier, power can bidirectional flow ，can maintain the stable DC voltage)

cpld/fpga积分梳状滤波器(CIC)设计-cpld/fpga Integral comb filter (CIC) design

说明：  Digital pre-distortion (DPD) is an advanced digital signal-processing technique that mitigates the effects of power amplifier (PA) nonlinearity in wireless transmitters. DPD plays a key role in providing efficient radio digital front-end (DFE) solutions for 3G/4G basestations and beyond. Modern FPGAs are a promising target platform for the implementation of flexible wireless DFE solutions, including DPD.

说明：  利用FPGA实现TMDS接口标准，可用于DVI以及HDMI接口的FPGA实现（含文档）(Video Connectivity Using TMDS I/O in Spartan-3A FPGAs)

7对于进入密码锁的按键，假设复位后七个灯显示" 0"，而使用sw5、sw6 2，则只要按下并松开sw5后七个灯就显示" 5"，而只要按下并松开sw6，七个灯就正确显示值" 6

1553B的编解码程序很好用给大家分享 -the series 1553B decoder procedure is useful for everyone to share share

很好的fft学习程序感兴趣的同学可以看哈，下载一下。(it is very good )

比较详细的阐述了图像压缩的原理,并基于DSP和VHDL实现该系统,最后在FPGA上通过.(More detailed exposition of the principles of image compress, and VHDL-based implementation of the system, and finally in the FPGA.)

说明：  关于地铁售票的一些功能 基于自动买票的VHDL设计程序 比较经典(Subway ticket on some of the features of the VHDL-based auto-buying classic design procedure)