Design and Simulation of Phase Locked Loop Circuit Based on VCO Optimization

This Paper stars from the basic working principle of PLL, obtains the mathematical model of PLL based on the traditional PLL structure, and analyzes the phase-locked loop tracking performance, acquisition performance, stability and noise performance, and other performances of PLL. This paper describes the overall PLL circuit and the phase frequency detector, loop filter, VCO, frequency divider and other circuit modules. In the analysis and design, we use MATLAB to do the simulation of the circuit. The PLL circuit has reached the design requirements.