MATHEMATICAL MODELLING AND CALCULATION OF SYSTEMS OF PLL WITH ADDITION OF THE CORRECTING DEVICE

The actual problem of the correction method of system errors of PLL is considered. The function and schematic diagram of PLL system with the correcting device are provided. The mathematical model is constructed and analyzed on existence of mistakes and on degree of stability of the received system. On the basis of logarithmic amplitude-frequency and phase-frequency characteristics the stock of stability of system is determined by amplitude and phase.