DocumentCode :
1126293
Title :
Phase-Locked Loop Behavior near Threshold
Author :
Blanchard, A.
Author_Institution :
Centre National D´´Etudes Spatiales Toulouse Cedex, France
Issue :
5
fYear :
1976
Firstpage :
628
Lastpage :
638
Abstract :
The phase-locked loop behavior is analyzed following the quasilinearization Booton´s method. When the loop is locked on an unmodulated input signal with a static phase error, the phase detector nonlinearity produces an interaction between the static phase error and the voltage-controlled-oscillator (VCO) noise phase fluctuations. Formulas allowing one to compute the static phase error increase and the VCO phase variance increase are derived. When the input signal is phase modulated, there is an interaction between the static phase error, the VCO noise phase fluctuations, and the input signal phase modulation. Formulas are obtained that allow one to compute the loop loss of performances (static phase error increase and VCO phase variance increase) and the coherent phase demodulator output signal-to-noise ratio decrease. Finally, a slight modification to Booton´s procedure is proposed, leading to results in better agreement with experimental data.
Keywords :
Demodulation; Detectors; Fluctuations; Phase detection; Phase locked loops; Phase modulation; Phase noise; Signal to noise ratio; Voltage; Voltage-controlled oscillators;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/TAES.1976.308265
Filename :
4101708
Link To Document :
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