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.
Results
Showing 1 to 20 of 97 for “"thermal noise"”.
-
A study of thermal noise
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
-
Coating Thermal Noise in Gravitational-Wave Detectors
… like Advanced LIGO and Advanced Virgo is thermal noise arising from the highly reflective multilayer coatings on the test mass mirrors. Reducing this coating thermal noise, particularly its Brownian component, while simultaneously maintaining exceptionally low optical absorption and …
-
Spontaneous stochasticity and thermal noise in turbulent systems
The student, Dmytro Bandak, submitted this Dissertation for approval on 2023-06-20 at 19:47.
-
Temperature and Thermal Noise Suppression for Precision Mechanical Experiments
… high such that the sensor is not dominated by thermal noise and the sensor can be cooled to the ground state. This thesis creates scaling laws for the interaction between the mass size bonded to a membrane resonator and the resonator's quality factor. With such a resonator, the entanglement is …
-
A study of transient heat conduction and thermal noise in an Earth radiation budget radiometer
… incident radiation on a thermistor bolometer thermal radiation detector. The CERES radiometers scan back and forth across the Earth and surrounding space as the satellite orbits the Earth. Each scan has a period of about six seconds. This not only results in a transient radiation signal …
-
Effect of noise on the pull-in dynamics of an electrostatic microswitch
… this research is to investigate the effects of noise on the pull-in dynamics of a micro-electromechanical switch. We take into account thermal noise and noise present in the voltage source. Thermal noise is modeled as white noise. First, we study its effect on the linear response of the system. …
-
Design of a Bandgap-Less Temperature Sensor for Achieving High Untrimmed Accuracy
… to previous art, this sensor employs high-thermal noise switched capacitor amplifiers, which are digitized by a bandgap-less successive approximation analog-to-digital converter. The flicker noise is attenuated through autozeroing, which also allows amplifying the thermal noise further. …
-
Bandwidth and Energy-Efficient Route Discovery for Noisy Mobile Ad-Hoc Networks
… BSP. However, these schemes do not consider thermal noise and interference which exist in real life MANETs, and therefore, do not perform well in real life MANETs. Real life MANETs are noisy and the communication is not error free. This research argues that a broadcast scheme that considers …
-
A low-power reconfigurable analog-to-digital converter
… several power reducing features such as thermal noise limited design, global converter chopping in the pipeline mode, opamp scaling, opamp sharing between consecutive stages in the pipeline mode, an opamp chopping technique in the delta-sigma mode, and other design techniques. The opamp …
-
A time-based energy-efficient analog-to-digital converter
… cancellation of comparator offset and delay, 1/f noise, and switching charge-injection. The use of few components and an effcient mechanism for amplification and error cancellation allow for energy-effcient operation: In a 0.35 [mu]m implementation, we were able to achieve 12 bits of DNL limited …
-
A Study of Spread-Spectrum Multiple-Access Communications Over Fading Channels
… multipath fading channels are considered. Thermal noise modeled as additive white Gaussian noise (AWGN) is also assumed to be present at the receiver.
-
Optimising Recording & Stimulation Performance of Neuronal Microelectrode Arrays through Macroporous Conducting Polymer Modification
… (i) recording, through reduced impedance and thermal noise and (ii) stimulation, through increased cathodic charge storage capacity (CSCc) and charge injection limits (CIL). Alongside microelectrode modification, we hypothesise that the refinement of recording instrumentation (amplifier and …
-
Electronic Mitigation of Polarization Mode Dispersion
… considered. For the two main types of systems: thermal noise limited systems and systems exhibiting ASE (systems using optical amplifiers), we demonstrated and quantified the induced improvement (measured as power penalty reduction). The most sophisticated technique that we considered (NLC+FDE) …
-
Multiscale models for structure and dynamics of confined fluids
… question is to understand the role of thermal noise in nanofluidic dynamics and transport. We discuss a combined memory function equation (MFE) and generalized Langevin equation (GLE) based approach (referred to as MFE/GLE formulation) to characterize thermal noise in molecular fluids. …
-
Design techniques for Power-Efficient Delta-Sigma Analogue-to-Digital Converters
… categorised into technology-limited and noise-limited, the power efficiency of the former is benchmarked by the Walden Figure-of-Merit (FoMW), and the latter, by the Schreier Figure-of-Merit (FoMS). Technology scaling over the past decades has indicated that FoMS, in noise-limited ADCs, …
-
Tolimosios infraraudonosios srities optoelektronikos įtaisų žemo dažnio triukšmo charakteristikos /
… operational efficiency, and low-frequency noise characteristics (1/𝑓 noise, generation-recombination noise, shot noise, and thermal noise) of AlGaAs and GaAsBi laser diodes. The goal is to contribute to the development of efficient, reliable, and versatile laser systems that are suitable …
-
Multiple-user quantum information theory for optical communication channels
… point-to-point bosonic channels with additive thermal noise, under the presumption of a conjecture on the minimum output von Neumann entropy. In the first part of this thesis, we evaluate the optimum capacity for free-space line-of-sight optical communication using Gaussian-attenuation …
-
Aspects of mirrors and suspensions for advanced gravitational wave detectors
… so research is focussed on reduction of various noise sources by upgrading of the detectors. One important noise source is thermal noise (both Brownian and thermo-elastic) - a limiting factor at midband frequencies. Reduction of mechanical loss in mirrors and their suspensions will help lessen …
-
Drifting-dipole noise model of nanometer MOSFETs for radio frequency integrated circuit design
… Among these issues, it is found that the thermal-noise based formulation, such as the one in the widely accepted BSIM model, starts to deviate from the measured noise parameters of 120-nm CMOS devices. Therefore a new high-frequency noise model is required to allow first-pass radio …
Page 1 of 5