A novel design and implementation approach to a high-order all DPLL has been proposed in this paper. In this DPLL a Proportion-Integral(PI) control algorithm based block was substituted for some conventional digital filter based ones. And it is characteristic of its simple structure, flexible control method, high phase tracking precision, excellent loop performance and easy system integration, etc.. At first the system structure and principles of the high-order all DPLL are introduced, then relevant theoretic computation and computer simulation are implemented. At last its FPGA based prototype...
