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 10 of 10 for “"Phase lock loop"”.
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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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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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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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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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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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Power Sharing and Power Quality Improvement in Parallel Connected Power Converters in the Microgrid
Power electronics-based Voltage Source Converters (VSCs) have been widely used as an interface between energy source and the grid/load in microgrid system. The VSCs are required not only to provide the basic function that achieves reliable and accurate power sharing in a microgrid, but also to …
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Κυκλώματα υψηλών συχνοτήτων για σύστημα υπερ-ευρείας ζώνης με διαμόρφωση συχνότητας FM-UWB
Ο κύριος στόχος της διατριβής είναι η σχεδίαση των κύριων κυκλωμάτων ενός τηλεπικοινωνιακού συστήματος υπέρ–ευρείας ζώνης (UWB). Συγκεκριμένα, σχεδιάζονται σε τεχνολογία CMOS 90nm και αναπτύσσονται τα πλέον κρίσιμα κυκλώματα του PLL του FM-UWB πομπού με βάση ένα σύστημα FM-UWB, το οποίο στηρίζεται …
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Fully Distributed Control and Its Analog IC Design For Scalable Multiphase Voltage Regulators
… the market share of one design, scalable phase design based on the same type of IC is a new trend in VR design. To achieve higher power density and at the same time to achieve scalable phase design, the concept of Monolithic Voltage Regulator Channel (MVRC) is introduced in this …
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High-performance velocity, frequency and time estimation using GNSS
… the velocity is estimated cancel out. Carrier-phase difference solution enables velocity accuracy in the order of 1 mm/s, a high-level accuracy which is crucial for many applications, including Inertial Measurement Unit (IMU) calibration, motion compensation for Synthetic Aperture Radar (SAR) …