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 15 of 15 for “"pulse generators"”.
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Semiconductor-magnetic pulse generators
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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A Hybrid Switched-Capacitor Converter for Capacitive Wireless Power Transfer in Biomedical Applications
On market rechargeable pulse generators, use inductive wireless power transfer (I-WPT), but capacitive wireless power transfer (C-WPT) has the potential to provide safety and size improvements over I-WPT. Current C-WPT research is focused on resonant capacitive coupling methods. Such works have …
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High-performance compact gas filled spark switches
Gas filled spark switches are used extensively in pulsed power systems for their high rate of dV/dt, dI/dt, fast closing times with low jitter, and their high voltage and current capability. Recently there has been a renewed interest in designing spark switches that can operate with environmentally …
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A Study of a Versatile Low Power CMOS Pulse Generator for Ultra Wideband Radios
… In this thesis, we describe the design of a CMOS pulse generator for impulse based UWB systems. The structure of our pulse generator is based on the topology of a single tap CMOS power amplifier. By increasing the number of taps on a CMOS power amplifier, it is possible to generate sub-nanosecond …
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Digitally-Controlled Deep Brain Stimulation Lead Implant System
… of the brain. The advances in implantable pulse generators designed for deep brain stimulation have been remarkable, and the applications for deep brain stimulation continue to grow including multiple sclerosis (Berk, et al. 2002), severe psychiatric disorders (Kopell, Greenberg and Rezai …
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Profitability improvement through profit mapping
… The division is experiencing a phenomenon where pulse generators and leads' product life cycle transitions may be slower than ideal. In addition, Boston Scientific is exploring ways to systematically and accurately assess its products' return on investments. The approach to the project is a …
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Advancements in the Treatment of Malignant Gliomas and Other Intracranial Disorders With Electroporation-Based Therapies
… IRE (H-FIRE) utilizes bursts of bipolar pulsed electric fields on the order of the cell charging time constant (~1 μs) to ablate tissue while reducing nerve excitation, muscle contraction, and is far less prone to differences in electrical heterogeneities. Throughout my dissertation, I …
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Ultrashort pulse generation from diode laser devices
… study of generation of ultrashort optical pulses from diode lasers. Simple and cost-effective techniques were used to generate high power, high quality optical short pulses at various wavelength windows. The major achievements presented in the thesis is summarised as follows. High power …
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Focal waveform of a prolate-spheroidal impulse radiating antenna (IRA)
Impulse Radiating Antennas (IRAs) are designed to radiate very fast pulses in a narrow beam with low dispersion and high field amplitude. For this reason they have been used in a variety of applications. IRAs have been developed for the transient far-field region using paraboloidal reflectors. …
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Design, Construction, and Operation of a Fast Rise Time, High Voltage Pulse Generator
Made available in DSpace on 2017-07-06T18:59:00Z (GMT). No. of bitstreams: 2 Stygar_William_A_MS.pdf: 39230253 bytes, checksum: 2e326b306be997fb69d8c55105b1ce45 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1980
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Nanosecond pulse discharges in electronegative gases
… gap subjected to highly overvolted nanosecond pulses. The electrode separation is 1 cm. U.V. radiation is applied prior to the arrival of the pulse to the gap. In C2Fg-Ar mixtures the pressure ranges from 500 Torr to 960 Torr and the overvoltage ranges from 50% to 300%. After the i n i t i a l …
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Low power rf transceivers
… simulation and design of oscillators and pulse generators respectively.
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Silicon-Based RFIC Multi-band Transmitter Front Ends for Ultra-Wideband Communications and Sensor Applications
… detail. To generate the required UWB signals, pulse generators are designed and integrated into the transmitter chips. The first prototype UWB transmitter is designed in Freescale Semiconductor 0.18μm SiGe BiCMOS technology for operation over three 500 MHz bands at center frequencies of …
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Characterization of Ultra Wideband Communication Channels
… in channel characterization effort also include pulse generators and antennas as integral parts of the channel, since the pulse shape and antenna characteristics have significant impact on channel parameters. At a fundamental level, the propagation of UWB signals, as any electromagnetic wave, is …