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 35 for “"propagation delay"”.
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Actively exploiting propagation delay for acoustic systems
"Propagation delay refers to the length of time it takes for a signal to travel from point A to point B. Many existing systems, including Global Positioning System (GPS) localization, vehicular imaging, and microphone array beamforming, have taken advantage of propagation delay. This dissertation …
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Design of an ARQ/AFEC link in the presence of propagation delay and fading
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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A low power and fast CMOS arithmetic logic unit
… of the circuit is being measured through the propagation delay of the ALU. The result shows the propagation delay for 1V power supply is 3.65μs.
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Layout Synthesis of Nmos Gate-Cells
… device sizes are adjusted to accomodate modified propagation-delay requirements.
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Wire delay models for global placement of ASICs
A new model for the propagation delay between two logic gates for timing-driven global placement is proposed. The model is a function of the number of pins on the net, the half perimeter of the bounding box enclosing the net, and the half perimeter of the bounding box enclosing the driving pin and …
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An investigation of sensitization conditions and test effectiveness for CMOS faults
… methods. In this research, the effectiveness of propagation delay testing for open and short faults and supply current monitoring for short faults is investigated. Representative circuits are modeled and simulated over a wide range of fault severities. Factors, such as circuit and fault features, …
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A Basic Isolated Half-Bridge Silicon Carbide Gate Driver for Electric and Hybrid Electric Vehicles
… of peak output current, with 10 nanoseconds of propagation delay, and with a 2 milliamp quiescent current.
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A cooperative communication protocol for wireless ad-hoc networks
… Using network topology information derived from propagation delay measurement, nodes dynamically establish and update membership in rebroadcasting cells. Rebroadcast cells use constructively interfering modulation schemes to broadcast radio signals together, directing an amplified signal toward …
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Performance analysis of HDLC protocol operating in asynchronous balanced mode
… the links. Satellite links have long propogation delays compared to terrestrial links, and hence, have longer error recovery times. For such links, errors in acknowledgements have considerable impact on the throughput. In this analysis, the effect of errors in acknowledgements is taken in to …
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High Frequency Isolated Power Conversion from Medium Voltage AC to Low Voltage DC
… is our design challenge in terms of symmetry propagation delay, cross talk phenomenon elimination and shoot through protection. Gate drive IC is carefully selected to achieve symmetrical propagation delay and high common mode dv/dt immunity. Zero turn off resistor is achieved with minimized …
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ΒΡΑΔΥΝΗ ΔΙΙΣΗΜΕΡΙΝΗ ΔΙΑΔΟΣΗ ΠΟΛΥ ΥΨΗΛΩΝ ΡΑΔΙΟΣΥΧΝΟΤΗΤΩΝ ΜΕΤΑΞΥ ΕΛΛΑΔΟΣ ΚΑΙ ΑΦΡΙΚΗΣ ΓΥΡΩ ΑΠΟ ΤΟ ΜΕΓΙΣΤΟ ΤΟΥ 21ΟΥ ΗΛΙΑΚΟΥ ΚΥΚΛΟΥ (1978-1982)
… AFTERNOON AND EVENING TYPETRANSEQUATORIAL PROPAGATION (TEP) WITH SPECIAL IONOSPHERIC PHENOMENA PRESENT IN THE EQUATORIAL ZONE. THE PARTICULARITIES OF THE EURO-AFRICAN TEP SECTOR ARE STATED TOGETHER WITH THE RESEARCH WORK CARRIED OUT DURING PAST TWO AND LAST SOLAR CYCLES. THE RESULTS OF …
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Contributions towards a coherent chaotic oscillator at 100MHz and 70 GHz antennas for automotive radar applications.
… of the coherent chaotic oscillator in terms of delays and linearity are investigated using two simulation software: MATLAB and Advanced Design System (ADS). A general relation between the allowed propagation delay and frequency is devised and the problems in the design and implementation of such …
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Computationally efficient characterization of standard cells for statistical static timing analysis
… library. This technique would characterize the propagation delay and output slew of an individual cell for subsequent timing path analyses. Its efficiency stems from the fact that it only needs to find the delay or output slew in the vicinity of the ?- sigma operating point (where ? = 0 to 3) …
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End-to-end data reliability in optical flow switching
… optimal algorithm(s) to minimize the total delay. We propose four classes of OFS protocols, then compare them with the Transport Control Protocol (TCP) over Electronic Packet Switching (EPS) and indicate under what values of the parameters: file size, bit error rate (BER), propagation delay …
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Power Transformer Partial Discharge (PD) Acoustic Signal Detection using Fiber Sensors and Wavelet Analysis, Modeling, and Simulation
… kHz. In addition, with the assumed acoustic wave propagation delay between PD source and sensors, it was found that all PD activities occur in the first and third quadrant in reference to the applied sinusoidal transformer voltage.
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ULTRA-LOW K DIELECTRIC MATERIALS WITH HIGH BREAKDOWN STRENGTH AND EXCELLENT MECHANICAL PROPERTIES
… low k dielectrics are needed for low signal propagation delay, cross talk, interconnect delay, heat dissipation, and power loss, thus leading way to achieve faster computing time and continued scaling of microelectronic devices.
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Study of Current Optocoupler Techniques and Applications for Isolation of Sensing and Control Signals in DC-DC Converters
… techniques in the specific areas of propagation delay, linearity, power consumption, and voltage isolation to determine the baseline performance that future devices could improve upon. The techniques employed to operate the current optocoupler technology were looked at individually …
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Piezoelectric Transformer and Hall-Effect Based Sensing and Disturbance Monitoring Methodology for High-Voltage Power Supply Lines
… with a linearity of ±1%. The recorded group delay data shows that propagation delay through PT reduces to few microseconds above 1kHz input signal frequency. Similarly, the non-intrusive current sensor detects current with a response time of 8μs and converts the current into corresponding …
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SYNTHESIS AND TESTING OF THRESHOLD LOGIC CIRCUITS
… pattern for each fault excites the maximum propagation delay at the gate (the fault site). This is a high quality ATPG. Since current mode threshold logic gate circuits are pipelined and the combinational depth at each pipeline stage is practically one. It is experimentally shown that the …
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Advanced random access techniques for satellite communications
… In chapter 2 a stability and packet delay model for channel analysis and design are presented, showing that proper design through this tools can ensure high performance of the new access scheme. The use of control limit policies is also introduced and its use is thoroughly discussed …
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