Results 41 to 50 of about 6,749 (208)
LADRC-Based Magnetic Field Measurement Method for a Nuclear Magnetic Resonance Rotation Sensor
Applied Sciences, 2021 Magnetic field measurement is fundamental to nuclear magnetic resonance rotation sensors (NMRRS). A phase-locked loop (PLL)-based measurement with two nuclear isotopes is commonly applied to observe the magnetic field.
Xinghua Zhao +4 more
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Reinvestigation of Single-Phase FLLs
IEEE Access, 2019 Besides well-known phase-locked loops, frequency-locked loops (FLLs) are applicable to grid synchronization for grid-tied power converters. The models, principles, and algorithm structures of existing notch filter-based single-phase FLLs are often ...
Xiuqiang He, Hua Geng, Geng Yang
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The Coefficient of the Voltage Induced Frequency Shift Measurement on a Quartz Tuning Fork
Sensors, 2014 We have measured the coefficient of the voltage induced frequency shift (VIFS) of a 32.768 KHz quartz tuning fork. Three vibration modes were studied: one prong oscillating, two prongs oscillating in the same direction, and two prongs oscillating in ...
Yubin Hou, Qingyou Lu
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Design of a fast-acquisition phase-locked loop for frequency control systems
Dianzi Jishu YingyongPhase-locked loop (PLL) is a negative feedback control system that can achieve phase synchronization of two signals. Its filtering effect can make its passband narrow, and its output frequency automatically track the input frequency.
Chang Jian +4 more
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Zhongguo dianliIt is required for grid-connected converters to obtain synchronous information quickly and accurately when a short-circuit fault occurs in the grid.
Chaobo DAI +3 more
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A Concept of Synchronous ADPLL Networks in Application to Small-Scale Antenna Arrays
IEEE Access, 2018 In this paper, we introduce a reconfigurable oscillatory network that generates a synchronous and distributed clocking signal. We propose an accurate model of the network to facilitate the study of its design space and ensure that it operates in its ...
Eugene Koskin +2 more
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A Frequency Locked Loop Using a Phase Frequency Detector
The Journal of Korean Institute of Electromagnetic Engineering and
Science, 2017 논리회로로 구성된 위상주파수 검출기(Phase Frequency Detector: PFD)는 집적회로 구현의 용이성으로 인해 위상잠금회로(Phase Locked Loop: PLL)에 널리 사용되고 있다. 반면, 주파수 잠금회로(Frequency Locked Loop: FLL)는 PLL에서 기준발진기를 제거하고 공진기가 기준발진기 역할을 하는 구성이다.
Pyung-Soon Im +2 more
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Three-frequency resonances in coupled phase-locked loops
, 2012 We construct an experimental model of a nonlinear dynamical system with three frequencies. With this analog electronic circuit made up of quasi-periodically forced coupled phase-locked loops, we investigate the structure of the scaling of three-frequency
Cartwright, Julyan H. E. +4 more
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Robust Frequency-Adaptive Quadrature Phase-Locked-Loops With Lyapunov-Certified Global Stability
, 2022 This work describes and compares two phase-locked-loop (PLL) algorithms aimed at tracking a biased sinusoidal signal with unknown frequency, amplitude, and phase, with inherent robustness to dc offset. The proposed methods endow quadrature PLLs, renowned
Pin, Gilberto; Chen, Boli; Fedele, Giuseppe; Parisini, Thomas
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IEEE Access, 2017 DC offset in the input of phase-locked loops (PLLs) is a challenging problem since it will result in fundamental frequency oscillations in the estimated phase and frequency.
Menxi Xie +3 more
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