Zhongze Chen

Learn More
A bandwidth adaptable third-order all-digital phase-locked loop (PLL) based on PI control algorithm is proposed in this paper. On the analysis of the mathematical model of analog PLL system, mathematical model for bandwidth adaptable all-digital PLL is firstly established and theoretical analysis is therefore carried out, and then the relationship between(More)
This paper concerns the design of robust controller for a nonlinear system that can be represented or approximated in a non-affine form. The control algorithm is based on sliding mode control that incorporates a fuzzy tuning technique, and it superposes equivalent control, switching control, and fuzzy control. An equivalent control law is firstly designed(More)
An all DPLL (All-Digital Phase Locked Loop) based on fuzzy PI control algorithm is proposed in this paper. On analyzing system performance of a second-order PI control based PLL (Phase Locked Loop), the relationship between noise bandwidth with PI control parameters is derived, and fuzzy controller of the system is designed. Under the(More)
  • 1