VHDL设计的相关实验，包括4位可逆计数器，4位可逆二进制代码－格雷码转换器设计、序列检测器的设计、基于ROM的正弦波发生器的设计、数字密码锁的设计与实现。-VHDL design of experiments, including four reversible counters, four reversible binary code- Gray code converter design, the sequence detector design, the ROM-based sine wave generator design, digital lock design and implementation.