Behavior of phase-locked loops in the presence of large interfering signal

First order, imperfect second order, and perfect second order phase-locked loop effects in the presence of powerful interference are comparatively studied, subject to the requirement that the pull-in range for the first order loop and the imperfect second order loop be made equal, and that the natural angular frequency and damping coefficient be made equal for the perfect and imperfect second order loops. The harmonic balance method is used to analyze, and verify through computer simulation, the average value and variance of the error angular frequency, the average value of the output angular frequency, the phase jitter, and the synchronizing limit of the phase-locked loops. The imperfect second-order loop shows the best synchronization characteristics in the presence of interference.