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A Digital Frequency-Locked Loop System for Capacitance Measurement
IEEE Transactions on Instrumentation and Measurement, 2013Similar to phase-locked loops, frequency-locked loops (FLLs) are useful in many applications involving waveform synchronization or synthesis. Simple logic circuit-based relaxation oscillators convert capacitance to frequency, which is a characteristic inverse relationship between output frequency and input capacitance.
Robert Neal Dean, Aditi Kiran Rane
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Period Jitter of Frequency-Locked Loops
IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2015This paper presents a spectral analysis of period jitter of frequency-locked loops (FLLs). It is shown that the period jitter of the output clock of the FLL due to stationary noise sources is cyclostationary. It is further shown that the FLL behaves as a time variant loop and there is translation of jitter frequency at the output.
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Improving the Design of Frequency Lock Loops for GNSS Receivers
IEEE Transactions on Aerospace and Electronic Systems, 2012An analysis of the design and performance of the discrete-update GNSS frequency lock loop (FLL) is presented. Expressions for the design and the steady-state performance of one first-order and two second-order FLL loop filters are developed. Transient performance of the FLL in the presence of thermal noise is examined and the relative performance of ...
James T. Curran +2 more
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A Zero-Tracking SOGI-Based Frequency-Locked Loop
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022This paper proposes a zero-tracking second-order generalized integrator-based frequency-locked loop (ZT-SOGI-FLL) with better dynamics and stability than conventional SOGI-FLL. Unlike the internal model principle, the ZT-SOGI-FLL reconstructs the input signal under frequency deviation by tracking the zeros.
Wenshuai Shi, Jingrong Yu, Renyou Zhou
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Interference in Frequency-Locked Doppler Tracking Loops
IEEE Transactions on Aerospace and Electronic Systems, 1984The effects of interference on frequency-locked Doppler tracking loops are investigated. Conditions for jump from locking on the desired signal to locking on the interfering signal are established. Parasitic frequency modulation of the desired signal results when the other signal interferes with it.
Y. Bar-Ness, H. Bunin
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Frequency measurement using a frequency locked loop
2011 IEEE Energy Conversion Congress and Exposition, 2011A phase locked loop method is proposed for fast estimation of utility grid frequency, for control and protection purposes in grid-connected power converters. Using a second order generalized integrator (SOGI) and a ‘novel’ frequency locked loop (nFLL), which makes the SOGI frequency adaptive, the proposed SOGI-nFLL detects small and large step changes ...
Zijun Luo +3 more
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Distributed Frequency-Locked Loops for Wireless Networks
2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications, 2008The establishment of a common frequency refer- ence in a distributed wireless network is a critical factor in enabling cooperative communication strategies. In this paper we employ distributed locked loops to entrain the frequencies of autonomous nodes with wireless communication capabilities.
VARANESE, NICOLA +3 more
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Cooperative Navigation with the Vector Delay/Frequency Lock Loop
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2020This paper aims to improve GNSS signal processing for collaborating receivers through the development of a Cooperative Vector Delay/Frequency Lock Loop (CVDFLL), a variant of the conventional Vector Delay/Frequency Lock Loop (VDFLL) utilized in standalone receivers. The VDFLL enhances signal processing by taking advantage of spatial correlation between
Tanner M. Watts, Scott M. Martin
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IEEE Industrial Electronics Magazine, 2021
In the electrical power and energy (EPE) area, the traditional concept in designing the synchronization system of power converters is using the phase-locked loop (PLL) concept. An alternative way is using the frequency-locked loop (FLL) concept, which is also known as the adaptive notch filter, adaptive noise cancelation technique, gradient descent ...
Golestan, Saeed; id_orcid 0000-0002-8568-1612 +4 more
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In the electrical power and energy (EPE) area, the traditional concept in designing the synchronization system of power converters is using the phase-locked loop (PLL) concept. An alternative way is using the frequency-locked loop (FLL) concept, which is also known as the adaptive notch filter, adaptive noise cancelation technique, gradient descent ...
Golestan, Saeed; id_orcid 0000-0002-8568-1612 +4 more
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A Frequency-Locked-Loop Filter for Biased Multi-Sinusoidal Estimation
IEEE Transactions on Signal Processing, 2014In this paper, an adaptive filter, based on a third-order generalized integrator, is proposed to estimate all the parameters of a biased sinusoid. The averaging theory is used to prove that the filter identifies the unknown frequency of the signal, in the case of a pure biased sinusoid in input.
FEDELE, Giuseppe, Ferrise A.
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