Title :
A digital phase-locked loop for frequency detection
Author :
Werter, Michael J.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A digital phase-locked loop is introduced, which is specifically developed for frequency detection. The digital oscillator is realized with a coupled-form digital filter structure and a Hilbert transform is used for phase detection. The quadrature of the input signal is formed from two samples of the actual input signal. In this paper explicit formulas are derived for the noise variance in the frequency detector and for the acquisition time. The results of the digital phase-locked loop are compared with those of an adaptive digital filter with a resonator in the feedback loop
Keywords :
Hilbert transforms; circuit noise; digital filters; digital phase locked loops; Hilbert transform; acquisition time; coupled-form digital filter structure; digital phase-locked loop; explicit formulas; frequency detection; input signal quadrature; noise variance; Digital filters; Feedback loop; Flip-flops; Frequency locked loops; Phase detection; Phase frequency detector; Phase locked loops; Resonator filters; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.510323
