Realizace fázového závěsu pro standardní kartu sběru dat

Abstract

In chapters of this work I have to develop program of phase loop lock (PLL), describes of any change what I make and in the end section testing this program. I develop this program in ambience of LabVIEW, it will work for expansion options of using usual data acquisition boards, because usual data acquisition boards don’t have HW phase loop lock (PLL) on it. Phase loop lock is back loop control circuit which generates output signal with the same frequency and phase (eventually multiple of frequency) as the signal input. This work uses the principle of PLL to generate output signal witch corresponding to the multiple frequency of input signal. I use principle of PLL for optimization of sampling unknown periodic input signal – abiding integer number of period of measured signal in measured data for next processing this digitized signal for example application of FFT.