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Low-Power Frequency-Locked Loop Circuit with Short Settling Time
2022 45th Jubilee International Convention on Information, Communication and Electronic Technology (MIPRO), 2022A phase-locked loop (PLL) is an important and commonly used electronic circuit in various electronic systems. Its main drawback is the use of an RC low-pass filter which takes up the majority of the PLL area on the chip. The RC low-pass filter is necessary to ensure the PLL stability.
Andro Zamboki +5 more
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A global frequency estimator based on a frequency-locked-loop filter
2016 American Control Conference (ACC), 2016In this paper, a novel frequency estimator is proposed with global convergence properties, i.e. the frequency estimate asymptotically converges, under the assumptions of an averaging approach, from any initial condition to the actual one. The estimator makes use of an adaptive notch filter coupled with an adaptation mechanism guaranteeing the ...
FEDELE, Giuseppe, Ferrise A, D'Aquila G.
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Stability of Frequency Locked Loops
1989Passive frequency standards are characterized by the use of a reference resonance to stabilize the frequency of an external probe oscillator. A common configuration is shown in Fig. 1 [1–6]. The probe oscillator generally has phase modulation imposed on the carrier in order to interrogate the resonance with a minimum of offset.
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Design and Dynamics of Multiloop Optical Frequency Locked Loop
Journal of Lightwave Technology, 2013Next generation radar system desires frequency agile low phase noise local oscillator signal. A rapidly tunable multiloop optical frequency locked loop (OFLL) can provide such functionality. The OFLL employs a pair of electro-optic tunable microchip lasers that are heterodyned to produce a frequency agile microwave modulated optical subcarrier.
Milad Alemohammad +2 more
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Design and Implementation of the Discrete-Update Frequency-Locked Loop
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2021Frequency-locked loops (FLLs) are important in many signal processing applications, including communications and satellite navigation. Direct design of the discrete-update FLL (DFLL) in the digital domain is outlined herein and offers many advantages over the discretization of analog design, including the ability to better control the loop bandwidth ...
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DTFT-based frequency lock loop for GNSS applications
IEEE Transactions on Aerospace and Electronic Systems, 2008A frequency lock loop (FLL) for Global Navigation Satellite System (GNSS) applications is described here. The core element is the discrete time Fourier transform (DTFT), that leads to a maximum likelihood (ML) frequency estimation and can be conveniently implemented in a software defined radio (SDR) HW platform.
D. Borio +7 more
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Grid Synchronisation Based on Frequency-Locked Loop Schemes
2012This chapter presents synchronisation algorithms aimed to provide an estimation of the angular frequency and the fundamental component of a reference signal (grid voltage). Schemes for both single-phase and three-phase cases are presented. The proposed schemes do not require transformation of variables into the synchronous frame coordinates as ...
Gerardo Escobar +2 more
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A frequency-locked loop based on an oxide electrothermal filter in standard CMOS
ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference, 2017The thermal diffusivity of silicon D Si has been used to realize fully-CMOS frequency references. However, due to the temperature dependence of Dg, the accuracy of such frequency references is limited to about 1000 ppm (−55 °C to 125 °C, one-point trim) due to the inaccuracy of the on-chip temperature compensation circuitry.
Lorenzo Pedala +4 more
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Frequency locked loop with frozen mechanism
2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe), 2021Shan Jiang +2 more
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Frequency Locked Loop for grid-connected VSI synchronization and power analysis
2012 IEEE International Symposium on Industrial Electronics, 2012Future power systems will include the massive utilization of distributed generation mainly based on renewable energy resources. These renewable energy resources can be interconnected to the utility grid by means of power electronics converters working as Voltage Source Inverters (VSIs) which must be synchronized with the utility voltage ...
Alben Cardenas +2 more
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