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PI-Based Synchronous Reference Frame Frequency-Locked Loop
IEEE Transactions on Industrial Electronics, 2021A novel proportional–integral (PI)-based frequency-locked loop (FLL) is proposed and verified in this letter. Unlike the conventional FLL, which is implemented in the stationary ( αβ ) reference frame, the proposed PI-based FLL (PI-FLL) is implemented in the synchronous ( dq ) reference frame.
Xiangjun Quan +2 more
exaly +2 more sources
Asynchronously Controlled Frequency Locked Loop
2016 22nd IEEE International Symposium on Asynchronous Circuits and Systems (ASYNC), 2016A frequency-locked loop (FLL) system typically employs synchronous digital counters to estimate the frequency discrepancy between the output of a local oscillator and an external reference clock. We present a novel FIFO-based frequency detector as an alternative to such counters.
Suwen Yang +2 more
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Distributed Frequency-Locked Loops for Wireless Networks
IEEE Transactions on Communications, 2011The establishment of a common frequency reference in a distributed wireless network is a critical factor in enabling any degree of node cooperation in communication and sensing functions. In this paper we introduce Distributed Frequency-Locked Loops (D-FLL's) to control the carrier frequencies of autonomous nodes with wireless communication ...
VARANESE, NICOLA +2 more
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A 50 MHz phase- and frequency-locked loop
IEEE Journal of Solid-State Circuits, 1979A monolithic phase/frequency-locked loop has been developed for operation at up to 50 MHz. The loop combines wide capture range and narrow bandwidth, making it ideal for timing recovery in digital transmission systems. The 24-pin device features an electronically-tuned voltage-controlled LC oscillator and includes the input differentiation and full ...
R. Cordell +3 more
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A digitally-assisted electrothermal frequency-locked loop
2009 Proceedings of ESSCIRC, 2009A digitally-assisted electrothermal frequency-locked loop (FLL) is presented, whose output frequency is determined by the temperature-dependent thermal diffusivity of bulk silicon. In contrast to previous work, its noise bandwidth is defined by a digital, rather than an analog, filter.
S. Mahdi Kashmiri, Kofi A. A. Makinwa
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High-Order Frequency-Locked Loop: General Modeling and Design
IEEE Transactions on Industrial Electronics, 2021To improve the filtering capability of frequency-locked loop (FLL), the high-order bandpass filters FLL was proposed recently. This article proposes a high-order FLL in synchronous ( dq ) reference frame where the high-order low-pass filter is adopted. A general analytical model is established for the high-order FLL.
Xiangjun Quan +4 more
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Frequency Locked Loop FM Demodulator
IEEE Transactions on Communication Technology, 1967A new type of FM demodulator, the Frequency Locked Loop (FLL) is presented. The concept employed in this class of circuits is shown to be applicable in two forms. The first form is realized at the carrier, or IF frequency, to provide an FM detector that has the properties of not requiring a limiter preceding it and also of having a threshold superior ...
K. Clarke, D. Hess
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A Fractional Frequency Synthesizer Using Frequency Locked Loop
2007 14th IEEE International Conference on Electronics, Circuits and Systems, 2007This paper presents a new architecture for wideband fractional frequency synthesizer. The architecture is based on frequency locked loop (FLL). Fractional division is implemented in this FLL by using two feedback loops which are having different frequency division ratio N and N+1.
A. V. Rejeesh, Pradip Mandal
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Modeling Multipath Effects on Frequency Locked Loops
The International Technical Meeting of the The Institute of Navigation, 2020This paper investigates the impact of non-line-of-site (NLOS) and multipath signals on frequency-locked loops (FLLs), which are commonly used to obtain Doppler shift measurements for velocity estimation in radio navigation. First, we use theory to model the effects of NLOS signals on the Doppler estimate produced by a conventional FLL with an ...
Liangchun Xu, Jason Rife
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