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 20 for “"retiming"”.
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The Retiming and Routing of VLSI Circuits
"Multi-layer technologies present additional challenges to the routing of the nets because the layer assignment can have a large impact on the net delays. Traditional approaches cause the first few nets to monopolize the ""good"" layers. Therefore, they perform poorly under the metric of minimizing …
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Equivalence checking of retimed circuits
… one or both of which have undergone register retiming as well as logic resynthesis. The aim of the thesis is to improve the ability of Formality, an equivalence checking tool written at Synopsys, to handle retimed circuits. At the beginning of this project Formality already had an …
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Reducing Power in FPGA Designs Through Glitch Reduction
… dynamic energy consumption. In this study, retiming is used to reduce the unproductive energy wasted in signal glitches. Retiming can reduce energy by up to 92%. Evaluating energy consumption is an important part of energy reduction. In this work, an activity rate-based power estimation tool …
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Weather Impacts on Traffic Parameters and Signal Timing Performance
… to assess benefit of weather responsive signal retiming. Traffic signal optimization and simulation software were used to assess the impact of rainfall and benefit of retiming on travel time and average delay on a section of a hypothetical roadway. Rainfall increased travel time and average …
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Algorithmic Techniques for Logic Synthesis of Low Power VLSI Circuits
… gates under a general delay model (4) low power retiming of sequential circuits under a general delay model. In the first problem we provide a polynomial time algorithm for the synthesis of power optimal sc XOR trees under a zero delay model. In the second problem we propose efficient heuristics …
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Optimal traffic control for a freeway corridor under incident conditions
… on surface streets due to diversion, signal retiming for surface street intersections is necessary. A nonlinear programming model was formulated to provide an integrated traffic control strategy for a freeway corridor under incident conditions. The objective function of the optimization model …
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The design and implementation of a new wide-range frequency detector
… detector for use in clock recovery and data retiming applications. The new detector works in conjunction with the existing "mid-range" frequency detector to accurately lock the VCO to the incoming data rate. The new detector consists of two halves: one to detect when the VCO is too fast, and …
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Design and implementation of a synchronization scheduler in a distributed multimedia presentation system
… dynamic synchronization errors by means of a retiming method. Finally, we implement the scheduler in a simulated distributed environment to demonstrate its usefulness and effectiveness. The interval constraint graph model we developed takes into account the QoS of temporal constraints of a …
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Efficient Equivalence Checking in a Modular Design Environment
… We propose machine partitioning and minimum area retiming to alleviate the problem of large state spaces common in industrial designs. Our techniques result in exponential reductions in the state space and enable equivalence checking of machines which cannot be handled otherwise. Lastly, we …
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Noise and stability of actively modelocked fiber lasers
… coefficients governing the physics of pulse retiming that depend on the laser parameters; construction of an apparatus-including the development of harmonically modelocked soliton fiber lasers in both a ring and a sigma configuration-to measure the predicted coefficients; and residual …
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Essays on taxation and firm behavior
… generally that they create strong incentives for retiming extraction of the exhaustible resource to minimize tax burdens. The empirical estimates suggest small estimates of extensive responses to after-tax prices, meaning that wells are rarely shut, but they also suggest substantial retiming of …
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Planning for robust airline operations : Optimizing aircraft routings and flight departure times to achieve minimum passenger disruptions
… Maintenance Routing, and Flight Schedule Retiming. Because each airplane usually flies a sequence of flights, delay of one flight might propagate along the aircraft route to downstream flights and cause further delays and disruptions. We propose a new approach to reduce delay propagations …
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Crosstalk suppression techniques for multi-channel regeneration based on fiber optic parametic amplifier
… and reshaping the signal, and 3R adds retiming of the signal. Conventionally, electrical repeaters are used for the regenerations. In this regeneration system, the signal is converted from optical to electrical, regenerated electrically and finally converted back to an optical. Besides …
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All-optical signal processing using cascaded quadratic interactions in periodically poled lithium niobate waveguides
… are also investigated. An all-optical signal retiming system for on-off keying signals relying on pulse shaping and cSHG/DFG-based switching in a PPLN waveguide is demonstrated. Subsequently, two novel configurations of PPLN-based phase sensitive amplifiers (PSA) which have the potential as …
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Throughput Constrained and Area Optimized Dataflow Synthesis for FPGAs
… of most FPGA circuit modules, it also performs retiming at the high-level synthesis level. Third, this work proposes a novel approach that integrates the three inter-related synthesis techniques of pipeline scheduling, module selection and resource sharing. To the author's best knowledge, this …
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Processing of ultra-short optical pulses for high bit-rate optical communications
… is utilized in a single-pass configuration, retiming is obtained by preshaping clean control pulses into pulses with a parabolic shape. XPM induced by such pulses can provide linear frequency-shifting to shorter mistimed data pulses across a temporal window corresponding to the full width of …
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Ultra-long haul optical fibre transmission systems
… is required. The thesis demonstrates synchronous retiming by amplitude modulation that has allowed 20 Gbit/s data to propagate 125,000 km error free with an amplifier spacing approaching the soliton period. Ultimately the speed of operation of such systems is limited by the electronics used and, …
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Sufficiency-based Filtering of Invariants for Sequential Equivalence Checking
… that performing sequential optimizations like retiming or FSM re-encoding becomes somewhat of a bottleneck in the design cycle [2]. Therefore, a more powerful framework — Sequential Equivalence Checking (SEC) — has been gradually adopted in industry. In this thesis, we target on Sequential …
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Design-for-Test and Test Optimization Techniques for TSV-based 3D Stacked ICs
… their delay.</p><p>This dissertation derives a retiming flow that is used to recover the additional delay added</p><p>to TSV paths by test cell insertion.</p><p>Reducing the cost of test for 3D-SICs is crucial considering that more tests are necessary</p><p>during 3D-SIC manufacturing. To reduce …
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Integrated Airline Operations: Schedule Design, Fleet Assignment, Aircraft Routing, and Crew Scheduling
… that accommodate all the features of flight retiming, schedule balance, and demand recapture simultaneously, demonstrated a clear advantage by way of $35.1 and $31.8 million increases in annual profits, respectively, over the baseline case in which none of these additional features is …