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UDC 621.373.9

THE RESEARCH OF PULL-IN RANGE INCREASE METHOD OF RELAY PHASE LOCKED LOOP SYSTEM

S. I. Kholopov, head of the department, Associate Professor, RSREU, Ph.D., This email address is being protected from spambots. You need JavaScript enabled to view it.

The method of pull-in range expansion of relay astatic phase locked loop system (PLLS) using as a device supporting the analysis of phase error and reset logic oscillation phase discriminator is examined. Essence of the method consists in variation discriminatory description of phase discriminator form due to the slow periodic change of the oscillation produced by PLLS tuned generator. The purpose of the work is to consider a method for constructing relay astatic PLLS with logical phase discriminator, providing pull-in range, equal to hold-in range, and analysis of system parameters to realize the method. Formulas, allowing to define conditions where pull-in range, equal to hold-in range, is provided in the system, are shown. Estimations over parameters of PLLS nodes, executing variation of tuned oscillation form in accordance with the requirements determined by the method, are obtained.

Key words: phase locked loop system, pull-in range, relay astatic phase locked loop system, discriminatory description, logical phase discriminator.

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