Effect of Harmonic Noise on Phase-Locked Loop

The effect of the narrow-band noise on locking processes in the first order phase-locked loop with the legitimate harmonic signal is considered. The phase plane method is used to determine the conditions peculiar to the following modes: noise and signal locking, and asynchronous locking. Boundary values of the signal and noise parameters featuring the transition from one mode to another are obtained with the use of the numerical approach.