用VHDL语言编写实现以下功能：用PLL，复位器，分频器，同步时钟，计数器来产生正弦波，再在其上加扰，用FIR滤波器进行滤波整形，最后得到输出。-Using VHDL language to achieve the following functions: PLL, reset, clock synchronization, frequency divider, counter to generate sine wave, and then scrambling on the filter sh