Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Phase Lock"”.
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Nonlinear estimation theory and phase-lock loops.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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False lock in sampled-data phase lock loops
The false lock characteristics of a sampled-data phase lock loop containing a phase detector with a sawtooth characteristic are investigated. The ideal processor of data operated on by such a phase detector nonlinearity is derived in open-loop form. A second system is proposed which is shown to …
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Analysis and Design of Phase Lock Loop Based Islanding Detection Methods
As distributed generation penetrates the electric power grid at higher power levels, grid interface issues with distributed generation must be addressed. The current power system consists of central power generators, while the future power system will include many more distributed resources. The …
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Design and analysis of high performance low noise oscillators and phase lock loops
… of high purity, high speed and power efficient clock generation Integrated Circuits continue to be one the greatest challenges facing IC designers today. In order to address this challenge, this thesis considers the modeling and design of two fundamental clock generation circuits – the VCO and …
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Frequency dividers design for multi-GHz PLL systems
… frequency divider suitable for millimeter wave phase-lock loops is presented. The frequency divider has been implemented in a 90 nm standard CMOS technology. To the extent of maximizing the operative input frequency, the higher frequency digital blocks of the frequency divider have been realized …
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Transmit simulation and receive optimizations for 802.11b networks
… this paper also evaluates implementations of a Phase lock loop used to track Frequency Doppler and a Time Tracking Loop used to track Code Doppler under various Signal to Noise levels. The results from these simulations can be used to optimize various receive parameters and algorithms.
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Analysis and Simulation for Homogeneous and Heterogeneous SIR Models
… to rich dynamics such as synchronization and phase-lock oscillations.
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On the relationship between corticomuscular (EEG-EMG) phase coupling and muscular fatigue
… takes into account both the amplitude and phase of the two signals. However, the use of the phase lock value (PLV) has been over looked as a method for determining the level of synchrony. While the PLV is modulated purely by the phase between the two signals, it is unaffected by any …
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A low power controller for a MEMS based energy converter
… presented and discussed. The design of a self-locking controller, which is based on the present architecture, but uses a new energy feedback technique to phase lock to maximal energy transfer, is presented.
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Frequency synthesis using phase-controlled oscillator techniques
The behavior of the phase-controlled oscillator has been the subject of extensive analysis for many years. However, the vast majority of the literature assumes that the phase comparator, or error detector, of the system produces an output proportional to the sine of the phase difference. In recent …
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Phase-locking of neurons in the hippocampus and the medial prefrontal cortex of the rat to the hippocampal theta rhythm
… a significant portion of prefrontal neurons are phase-locked to the hippocampal theta rhythm and we compare the phase-locking properties of prefrontal and hippocampal cells. We also show that prefrontal neurons phase-lock best to theta oscillations delayed by approximately 50 ms and confirm this …
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Anatomical and physiological properties of the superior paraolivary nucleus in the rat
… spike activity timed to the stimulus offset and phase lock to amplitude modulations in complex sounds. Pharmacologically blocking glycinergic input abolished the offset response (indicating that offset activity is a rebound from glycinergic inhibition); blockade of glycinergic and GABAergic input …
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Broadband terahertz photonics
… laser's fundamentally large nonlinearity to phase-lock the cavity modes. These devices will enable the development of ultra-compact dual comb spectrometers based on QCLs, and will potentially even act as complete terahertz spectrometers on a chip. This thesis also uses broadband terahertz …
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Formal verification of analog and mixed signal circuits using deductive and bounded approaches
… Two techniques to verify the inevitability of phase locking in a Charge Pump Phase Lock Loop (PLL) circuit are presented: mixed deductivebounded and deductive-only verification approaches. The deductive-bounded approach uses Lyapunov-like certificates with bounded advection of sets to verify …
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Synchronising coherent networked radar using low-cost GPS-disciplined oscillators
… further assesses the use of line-of-sight (LOS) phase compensation, where the direct sidelobe breakthrough is used as the phase reference, to improve the GPS-disciplined oscillator (GPSDO) synchronised bistatic Doppler performance. Coherent bistatic, multistatic, and networked radars require …
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Novel techniques and materials for optical telecommunication systems
… development of an actively and harmonically mode-locked polarisation-maintaining erbium fibre ring laser operating at a repetition rate of 10GHz is first presented. Long-term stable operation is ensured by the use of an optical phase lock loop to maintain resonant operating conditions. The ring …
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Analysis of Inductor-Coupled Zero-Voltage-Transition Converters
As is the case for DC-DC converters, multi-phase converters require both high-quality power control and high power-density. Although a higher switching frequency not only improves the quality of the converter output but also decreases the size of the converter, it increases switching losses and …
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Reduced-order Adaptive Output Predictor for a Class of Uncertain Dynamical Systems: Application to EEG-Based Control of Working Memory
… filtered vectors to forecast mean phase lock values generated by binaural beats stimulation. The simplified and known model of the predictor proves effective in tracking brain responses, as demonstrated in experiments evaluating its ability to track mean phase locking values. The …
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Implementation of Real-Time Software Receiver for Gps or Glonass L1 Signals
… receiver prior to signal correlation. In-phase and quadrature accumulations are computed using bit-wise parallel techniques, and these accumulations are used to drive code tracking delay-lock loops (DLLs) and carrier tracking phase-lock loops(PLLs). The computation of accumulations and the …
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