Results 21 to 30 of about 3,295,289 (198)

Frequency quantization in first-order digital phase-locked loops with frequency-modulated input [PDF]

open access: yes, 2007
Presented at the International Workshop on Nonlinear Maps and their Applications (NOMA '07), INSA, Toulouse, December 13-14, 2007Frequency granularity in a digital phase-locked loop arises from quantization in the number-controlled oscillator which ...
Tertinek, Stefan   +2 more
core   +1 more source

Frequency-Adaptive Modified Comb-Filter-Based Phase-Locked Loop for a Doubly-Fed Adjustable-Speed Pumped-Storage Hydropower Plant under Distorted Grid Conditions

open access: yesEnergies, 2017
The control system of a doubly-fed adjustable-speed pumped-storage hydropower plant needs phase-locked loops (PLLs) to obtain the phase angle of grid voltage.
Wei Luo, Jianguo Jiang, He Liu
doaj   +1 more source

Statistical analysis of first-order bang-bang phase-locked loops using sign-dependent random-walk theory [PDF]

open access: yes, 2010
Bang-bang phase-locked loops (BBPLLs) are inherently nonlinear due to the hard nonlinearity introduced by the binary phase detector (BPD). This paper provides an exact statistical analysis of the steady-state timing jitter in a first order BBPLL when ...
Gleeson, James   +5 more
core   +1 more source

A Fixed Length Adaptive Moving Average Filter-Based Synchrophasor Measurement Algorithm for P Class PMUs

open access: yesEnergies, 2019
Accurate and fast synchrophasor measurement is the key to the wide applications of PMUs in the system-wide monitoring and reliable operation of smart grid.
Hui Xue, Mengjie Ruan, Yifan Cheng
doaj   +1 more source

Output-jitter performance of second-order digital bang-bang phase-locked loops with nonaccumulative reference clock jitter [PDF]

open access: yes, 2011
Bang-bang phase-locked loops (BBPLLs) are inherently nonlinear systems due to the binary phase detector (BPD). While they are typically used for clock and data recovery, the ongoing trend toward digital loop implementations has resulted in several ...
Tertinek, Stefan   +3 more
core   +1 more source

A Review on Micro-Watts All-Digital Frequency Synthesizers

open access: yesMicromachines
This paper reviews recent developments in highly integrated all-digital frequency synthesizers suitable to deploy in low-power internet-of-things (IoT) applications.
Venkadasamy Navaneethan   +4 more
doaj   +1 more source

A robust fusion bus frequency estimation method to improve frequency oscillation damping in power systems

open access: yesIET Generation, Transmission & Distribution, 2023
This paper proposes a new robust method for accurately and reliably estimating remote bus frequencies in a power system. Two different measurement sources for the remote bus frequency are considered, that is, the ideal Frequency Divider (FD) and the ...
Ali Farahani   +3 more
doaj   +1 more source

Analysis and Implementation of a Frequency Synthesizer Based on Dual Phase-Locked Loops in Cesium Atomic Clock

open access: yesApplied Sciences, 2023
The frequency synthesizer plays a crucial role in atomic clock technology. In this study, we demonstrate a direct microwave frequency synthesizer for a cesium atomic clock, employing frequency multiplication and a dual-phase-locked loop mode.
Guangkun Guo   +5 more
doaj   +1 more source

An improved second order generalized integrators phase locked loop for flexible DC transmission

open access: yesEnergy Reports, 2022
Accurate and fast phase locking is the primary condition for flexible DC transmission to realize reliable control. When the power grid is unbalanced or contains high-order harmonics, the traditional second order generalized integrator (SOGI) itself has ...
Zhiwen Wei   +3 more
doaj   +1 more source

Binary phase detector gain in bang-bang phase-locked loops with DCO jitter [PDF]

open access: yes, 2010
Bang-bang phase-locked loops (BBPLLs) are hard nonlinear systems due to the nonlinearity introduced by the binary phase detector (BPD). In the presence of jitter, the nonlinear loop is typically analyzed by linearizing the BPD and applying linear ...
Gleeson, James   +5 more
core   +1 more source

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