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 812 for “"Amplifier"”.
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All-Digital Audio Amplifier
The approach presented in these pages processes the audio information digitally and generates a two-level pulse-width modulation (PWM) signal that is amplified by a switching power stage and finally low-pass filtered before it is sent to a speaker. The purpose of the digital signal processing (DSP) …
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Methodology of amplifier design
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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An Intracochlear Hydrophone and Amplifier
… (PVDF-TrFE) intracochlear hydrophone and amplifier system for high-bandwidth sensitivity, surgical viability, and improved SNR by electrical shielding and circuit design. Our analysis shows that the copolymer PVDF-TrFE should be used due to its higher hydrostatic sensitivity, the sensor …
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An ultra-low-power neural recording amplifier and its use in adaptively-biased multi-amplifier arrays
… a micropower energy-efficient neural recording amplifier is presented. The amplifier appears to be the lowest power and most energy-efficient neural recording amplifier reported to date. I describe low-noise design techniques that help the neural amplifier achieve an input-referred noise that is …
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Amplifier Architectures for Wireless Communication Systems
… of RF transmitters and receivers, namely amplifiers. On the transmitter side, enhanced efficiency and broader bandwidth over single and multiple bands on power amplifiers will help to have superior performance in communication systems. On the other hand, for the receiver side, having low …
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An investigation of compound amplifier stages
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1959.
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A MEMS-based precision operational amplifier
Two main difficulties for amplifiers that attempt to make precision DC measurements are the inherent low-frequency noise of the amplifier and the leakage current of the amplifier input stage. This thesis presents a novel fully integrated operational amplifier design that addresses both measurement …
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A DC stabilized fully differential amplifier
The conventional method of constructing a gain amplifier is to use resistor feedback networks. However, present CMOS technology provides capacitors that offer substantially better tracking and linearity performance over variations in temperature. Draper Laboratory's High Performance Gyroscope …
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Performance of multichannel fiber optic parametric amplifier
… the key components in DWDM system is an optical amplifier. Fiber optical parametric amplifier (FOPA) can be used for several signal processing application including optical amplification, phase conjugate and wavelength conversion. FOPA operate based on a fiber nonlinearity known as four wave …
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Class-F Power Amplifier with Maximized PAE
… life in order to fit consumers’ needs. Power amplifiers (PA) at the front end of wireless equipment have drawn a big concern from engineers because of their large power consumption in the system. There is a lot research conducted on PA solutions for improving power-added efficiency (PAE) of …
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Broadband and Energy-Efficient Power Amplifier Architectures
In this dissertation, power amplifier circuits and architectures are proposed that provide high efficiency for spectral-efficient high peak-to-average power ratio signals that are being used in modern communications systems. Using the proposed amplifier architectures and circuits high efficiency …
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CMOS Power Device Modeling and Amplifier Circuits
A power amplifier (PA) is a key part of the RF front-end in transmitters for a local broadband network. Today, commercial PAs are made of III-V HEMT and HBT technology with excellent results. An integrated system-on-chip power amplifier circuit using CMOS technology for cost-effective and …
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A low-drift transistorized direct-current amplifier
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1961.
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New architecture for RF power amplifier linearization
Power amplifier linearization has become an important part of the transmitter system as 3G and developing 4G communication standards require higher linearity than ever before. The thesis proposes two power amplifier linearization solutions : two-point architecture and adaptive digital predistortion …
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The pulse amplifier in theory and experiment
Thesis: M.S., Massachusetts Institute of Technology, Department of Physics, 1936
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A novel wideband 140 GHz gyrotron amplifier
… 140 GHz, 1 kW pulsed gyro-traveling wave amplifier are presented. The gyro- TWA operates in the HE(0,6) mode of a novel cylindrical confocal waveguide using a gyrating electron beam. The electromagnetic theory, interaction theory, design processes and experimental procedures have been …
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