• TITLE: TIME AND FREQUENCY ANALYZES OF A FREQUENCY LOCKED LOOP
• AUTHOR(S): Đ. Perišić, M. Bojović, A. Žorić, Ž. Gavrić
• ABSTRACT: Unlike the Phase Locked Loops (PLL) based on the Time Recursive Processing, this paper describes one model of Frequency Locked Loop (FLL), which is based on the Time Nonrecursive Processing of the input periods. FLL represents linear discrete system, which is described by two difference equations. All analyzes in time domain are performed using Z transform approach. The analyzes in frequency domain are performed by matlab tools which are dedicated to design and application of digital filters. It was shown that FLL is very powerful in the tracking and predicting applications. In this paper, special attention was devoted to finding ways to use the powerful matlab tools in the analysis of FLL. The simulation of FLL functioning proofed the correctness of the mathematical analyzes. The realization of FLL was described. The oscilloscope picture, made on the realized model, is presented.
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