四位10进制VHDL频率计设计说明

四位频率计的结构包括一个测频率控制信号发生器、四个十进制计数器和一个十六位锁存器（本例中所测频率超过测频范围时有警示灯）。-Four 10-digit frequency counter VHDL design descr iption of the structure of the four frequency meter includes a measuring frequency control signal generator, four decimal counter and a sixteen bit latch (in this case the measured frequency over a frequency measurement range warning lights).