中文说明：是关于sigma delta PLL设计的详细论文，论文中有具体的设计细节，并在附录中有相应的matlab、vhdl code-Is about the design of sigma delta PLL detailed papers, papers in the specific design details, and in the appendix corresponding matlab, vhdl code
English Description：
Is about the design of sigma delta PLL detailed papers, papers in the specific design details, and in the appendix corresponding matlab, vhdl code