How to raise the phase lock speed of embedded DPLL is researched .The primary factor affecting fast phase lock is analyzed by using MATLAB. Then a fast all digital phase locked loop with a high precision automatic modulus control is proposed. It can control automatically the modulus of digital loop filter according to phase error. The DPLL has avoided adjusting phase continuously towards same direction in the process of pull-in and decreased oscillation because of the excess adjustment of phase, thus raising control precision and taking further step to quicken phase lock speed. It has proved b...
