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 12 of 12 for “"Signal generators"”.
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Design of a 1-200 MHz signal generator
… project is to design and develop a wideband RF signal generator with a frequency range of 1 - 200MHz to the following specifications: • output at 50Q • stable output • signal amplitude control • continuously variable frequency range up to VHF band • AM modulation capability In this project, the …
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A chirped, pulsed laser system and magneto-optical trap for rubidium
… and computer control for several arbitrary signal generators linked to drivers for acousto-optic and electro-optic modulators. This chirped, pulsed laser system will be used to perform state manipulations on the 85Rb MOT cloud using two-photon Raman transitions in an adiabatic rapid passage …
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Wideband direct conversion IQ modulators in indium phosphide DHBT technology
… across the full bandwidth of existing vector signal generators and also extend that bandwidth beyond the current state of the art. I employed a circuit architecture in which the limiting factor for modulator bandwidth was the device switching time, which enabled modulation across carrier …
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Uniaxial Strain Effect on Graphene-Nanoribbon Resonant Tunneling Transistors
… applications such as high-speed IC circuits, signal generators, data storage, etc., has been studied both theoretically and experimentally recently. The aim in this dissertation has been to study the effect of the uniaxial strain on the graphene nanoribbon resonant tunneling transistors …
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An ultra high resolution FMCW radar
… is a standard problem in radar. Using classical signal processing techniques, the range resolution is proportional to the bandwidth of the transmitted signal. This poses a serious problem in radar as very large bandwidths are required - typically lSOGHz for 1 mm range resolution. Alternative …
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Integration and testing of a digital transceiver for a dual frequency, pulse-doppler radar
… of the digital transceiver included laboratory signal generators, spectrum analyzers and oscilloscopes. The digital transceiver was able to function at pulse repetition rates exceeding 2 kHz, with a single transmit channel and three receive channels active. The lowpowered monostatic prototype …
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Theory and design of a hardware stochastic reliability simulator.
… the simulator is the generation of random event signals of prescribed distribution. Considerable care has been taken in the design of the event signal generators, and their operation is both mathematically and statistically investigated to verify their performance. Finally the simulator is …
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Low-Power RF Front-End Design for Wireless Body Area Networks
… of the proposed RF front-end. Two quadrature signal generation techniques were proposed and implemented for generation of quadrature frequency sources. The two quadrature voltage controlled oscillators (QVCOs) were designed using our proposed current-reuse VCO with two damping resistors. A …
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High Performance RF Circuit Design: High Temperature, Ultra-Low Phase Noise, and Low Complexity
… transmitter design, ultra-low phase noise signal generators, and compact and low complexity polar transmitter design. Increase in the ambient temperature can impact the performance of the entire communication system. However, the RF hardware is main part of the system that is under the …
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Design and Implementation of an RFI Direction Finding System for SKA Applications
… to be able to perform observations of weak signals from space, they need to operate in a radio-quiet environment. Any radio frequency interference (RFI) will interfere with the ability of the telescope to collect data. With the proliferation of electrical and electronic devices, RFI …
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Energy storage and generation from thermopower waves
… current (AC) batteries and self-powered signal generators, which could easily be miniaturized. Microelectromechanical systems and sensors would benefit from thermopower wave generators to enable functions such as communications and acceleration that currently require large power packs. …
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Design techniques for safe, reliable, and trustworthy analog circuits
… circuits is fairly mature, yet analog and mixed signal (AMS) circuits still present a significant challenge for verification and testing. The development of in-field tests for AMS circuits is relatively new. Part of the difficulty is the many constraints that define satisfactory function. …