Eliminating False Lock in Phase-Locked Loops
- 1 March 1979
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-15 (2) , 275-281
- https://doi.org/10.1109/TAES.1979.308715
Abstract
A model is developed for phase-locked loops incorporating phasefrequency detectors. This model facilitates analysis of the loop and enables us to derive the conditions for false lock. It is shown by analysis that phase-locked loops with phase-frequency detectors are indeed capable of false lock; this theoretical result is verified by experimental results. A method for eliminating false lock is then proposed. This method was implemented in a simple circuit; we present the results of this experiment and show that the method we propose is capable of eliminating false lock.Keywords
This publication has 2 references indexed in Scilit:
- Speed Control by Phase-Locked Servo Systems -- New Possibilities and LimitationsIEEE Transactions on Industrial Electronics and Control Instrumentation, 1977
- Phase-locked loops for motor-speed controlIEEE Spectrum, 1973