38译码器，用于在FPGA上实现38译码器-38 decoder 38 decoder on FPGA

基于FPGA的DDS波形发生器的设计与实现,-DDS waveform generator based on FPGA Design and Implementation,

含异步清零和同步使能的计数器的设计，可以实现计数，异步清零，同步使能等功能(The design of a counter with asynchronous zero and synchronization enables counting, asynchronous zero, synchronization and other functions)