TITLE
SIMPLE TIME-PHASE/FREQUENCY LOCKED LOOP, FUNCTIONING AS LOW PASS TIME-DIGITAL FILTER
AUTHOR(S)
Djurdje M. Perišić1*, Aleksandar Žorić2
ABSTRACT
This article describes development, time and frequency analysis, application and simulation of a recursive Time-Phase/Frequency Locked Loop (TP/FLL). The described TP/FLL is based on the measurement and processing of the time-differences between periods of the input and output signals. It may function either as a Phase Locked Loop or a Frequency Locked Loop. TP/FLL is very simple for implementation because it is defined only by one system parameter and one outside control word. Mathematical description, analysis of stability conditions and properties of TP/TFLL are performed using Z transform. Using mathematical analyses and simulations, it is shown that TP/FLL is widely applicable for the phase shifting of pulse signal. Although very simple, TP/FLL naturally possesses the property of low pass digital filter. Special emphasis is given to the analysis and development of a Time-low pass digital filter intended for the filtering of pulse signal periods, using the Mat-lab tools intended for development of classical digital filter.
DOI
http://www.doi.org/10.70456/NYFD2549
DOWNLOAD
https://unitechsp.tugab.bg/images/2024/2-EST/s2_p2_v2.pdf
How to cite this article:
Djurdje M. Perišić, Aleksandar Žorić, SIMPLE TIME-PHASE/FREQUENCY LOCKED LOOP, FUNCTIONING AS LOW PASS TIME-DIGITAL FILTER, UNITECH – SELECTED PAPERS - 2024