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 92 for “"noise performance"”.
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Narrow-band noise performance of pumped nonlinear systems.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1966. Sc.D.
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Gain and Noise Performance of Bi/Er Co-Doped Fibre Amplifiers
… models are explored to analyse net gain and noise figure performance of BEDFAs. And the optimized design of the BEDFA with desirable net gain and noise figure are provided. Firstly, some basic experiment techniques relevant to fibre amplifiers characteristics, including emission, …
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Time-Variant Components to Improve Bandwidth and Noise Performance of Antennas
Without noise, a wireless system would be able to transmit and receive signals over an arbitrary long-distance. However, practical wireless systems are not noise-free, leading to a limited communication range. Thus, the design of low-noise devices (such as antennas, amplifiers, and filters) is …
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Noise performance of erbium-doped fiber amplifiers with forward and reverse plumbing
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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A temperature insensitive low noise RC relaxation oscillator
… absence of current source in the RC branch, good noise performance is also achieved. Combined with the comparator offset canceling switch matrix, good temperature stability and noise performance is achieved. Fabricated in the 65 nm CMOS technology, the prototypes achieve an average inaccuracy of …
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Optimizing the selection of rumble strip design and construction
… traffic crashes by generating in-vehicle noise for alerting inattentive drivers who are about to leave their travel lanes and/or approach stop-controlled intersections. Despite these safety benefits, they generate external noise levels that often cause disturbance and noise complaints from …
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Low phase noise, high bandwidth frequency synthesis techniques
A quantization noise reduction technique is proposed that allows fractional-N frequency synthesizers to achieve high closed loop bandwidth and low output phase noise simultaneously. Quantization induced phase noise is the bottleneck in state-of-the-art synthesizer design, and results in a …
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Ultrashort, High Power, And Ultralow Noise Mode-locked Optical Pulse Generation Using Quantum-dot Semiconductor Lasers
… in QD mode-locked lasers is addressed. The noise performance of two-section mode-locked lasers and a SOA-based ring laser was investigated. Significant reduction of the timing jitter under hybrid mode-locked operation was achieved owing to more than one order of magnitude reduction of the …
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Ultra-low noise and low temperature drift power supply system design for RF applications
This thesis started off with an investigation of noise performance of bench power supplies and existing commercial off-the-self Low Drop Out (LDO) regulators used as power sources in radio frequency applications. Noise of power supply contributes to the phase noise of RF transceivers. The …
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Monolithic low phase noise oscillators for moderate frequency applications
Low noise oscillators are critical building blocks in a wide range of commercial electronics. Increased levels of integration have created a strong need for integrated oscillator solutions despite generally inferior noise performance. The development of non-linear noise models that can accurately …
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Design and analysis of high performance low noise oscillators and phase lock loops
… advantage of an ultra wide tuning range. A novel noise aware ring oscillator model is also proposed which links the noise performance of the oscillator to its transistor dimensions giving insight to the design procedure. The use of this VCO model in a noise-aware PLL model allows the trade-off …
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A compact short-wave receiving antenna for use in high-noise areas
An antenna has been developed with a signal-to-noise performance that is better than that of a typical Rhombic antenna during local thunder storms. Although the design is of general application to the reception, in high-noise areas, of long distance transmissions, this work deals in particular with …
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Low jitter phase-locked loop clock synthesis with wide locking range
… in many communications applications. Phase noise and timing jitter are important design considerations for these communications applications. The desire for highly complex levels of integration using low cost CMOS technologies works against the minimization of timing jitter and phase noise …
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Design techniques for temperature insensitive, low phase noise oscillator
… which offer high quality factor, good phase noise performance and excellent stability against temperature, voltage and process variation. However, due to incompatibility with silicon integration and high power consumption, they are not suitable for biomedical devices which require long …
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Investigation of the pulse time modulation techniques for transmission of wideband signals
… is the principle factor in realising a highperformance bandwidth efficient communication system at an acceptable cost and complexity. Pulse time modulation technique represents an attractive alternative to purely digital or purely analogue modulation schemes which has received considerable …
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Modelling and applications of MOS varactors for high-speed CMOS clock and data recovery
… important circuit that contributes to the total noise performance of the CDR. Among different solutions known for this circuit, LC-VCO is acknowledged to have the best phase noise performance, due to the filtering characteristic of the LC tank circuit. We provide details on modelling and …
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Nonreciprocal microwave devices using parametric frequency conversion
This thesis endeavors to characterize the performance of nonreciprocal microwave devices enabled by parametric frequency conversion. Although such devices have been explored somewhat superficially in the 1960s, resurgent interest in low-noise nonreciprocal components has motivated new research in …
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Design of a low power capacitive sensor for a micromachined accelerometer
… device parameters, such as measurement range and noise performance, tailored to be suitable for use in a handheld. The final design measures ±3 g's of acceleration with approximately 140 [mu]g/ [square root of]Hz of noise, consuming only 200 [mu]W of power.
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