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 19 of 19 for “"flicker noise"”.
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Search for Magneto-Flicker Noise in Potassium
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-11T18:22:22Z No. of bitstreams: 1 1974_hockett.pdf: 3448026 bytes, checksum: 5d12adcdede844f6c856d5df85f6e510 (MD5)
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Characterization and modeling of low-frequency noise in MOSFETs
… technology has brought more issues in terms of noise. The noise cannot be completely eliminated and will therefore ultimately limit the accuracy of measurements and set a lower limit on how small signals can be detected and processed in an electronic circuit. One kind of noise which affects MOS …
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Analysis and Design of Low-Jitter Oscillators
… of different oscillator types in the presence of flicker noise, white noise and power supply noise. Key results are achieved using time domain simulations to determine cycle jitter of several different oscillator architectures, semiconductor processes and component features. In the end, a design …
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Study of chopper stabilization in single ended amplifiers
… techniques used to overcome low-frequency noise and DC offset errors in CMOS amplifiers. This thesis presents a detailed analysis of this approach. The fundamentals of chopping, followed by the design and underlying tradeoffs of a chopper stabilized amplifier, are included. A chopper …
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Inductively coupled plasma mass spectrometry with a twin quadrupole instrument using laser ablation sample introduction and monodisperse dried microparticulate injection
… are highly correlated and the majority of flicker noise cancels when the ratio is calculated. Using a copper sample, the isotope ratio 63Cu+/65Cu+ is measured with a relative standard deviation (RSD) of 0.26%. Transient signals for single laser pulses are also obtained. Copper isotope ratio …
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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. …
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Thermal and electrical characterization of a micro-hotplate for calorimetry
… or by decreasing its surface area. The noise spectral density of the hotplate's resistive temperature sensor is characterized. The hotplate's ability to resolve temperature is limited by the flicker noise in the sensor.
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Ring oscillator based injection locked clock multiplier
… frequency doubling technique to push the noise bandwidth of the circuit to Fref/3 to suppress DCO noise to a large extent. A background duty cycle error correction technique is employed to correct errors on the doubled clock that could be detrimental to performance. The design also …
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Spin Shot Noise measurement
Charge shot noise, the intrinsic fluctuations in the electrical current resulting from the statistics of the arrival of discrete electronic charges, was predicted more than a century ago2 and has been an invaluable tool for examining the mechanism of charge transport and the nature of …
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Design of a Bandgap-Less Temperature Sensor for Achieving High Untrimmed Accuracy
… 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. This work …
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An on-chip input driver for a high-voltage SAR ADC
… the offset of the driver and reducing flicker noise. Additional performance benefits are possible because the driver can be optimized for the specific load and timings of the ADC. The most important benefit of an on-chip input driver is that it simplifies the design process for the ADC …
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Compact Doppler radar system for heart rate detection
… and measured, including free space losses, noise, and fundamental heart rate detection limits. The minimum required power for close range rate detection was also assessed. Heart rates for subjects holding their breath or breathing normally were successfully tracked for signal power levels as …
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Flexible Electronics Based on Solution Processable Organic Semiconductors and Colloidal Semiconductor Nanocrystals
… To design reliable integrated circuits with low-noise, we characterize the flicker noise amplitude and origin. We find the figure of merit for noise, the Hooge parameter, to be 3 x 10^-2 for CdSe NC-FETs, comparable to other emerging solution processable organic semiconductors and promising for …
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Single molecule conductance spectroscopy: probing the gold-bio interface at the atomic scale
… of histamine in molecular junctions, and flicker noise analysis is applied to identify and assign one of the conductance features to a hydrogen bond-assisted binding configuration. These results and insights collectively establish single molecule conductance spectroscopy as a robust …
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Silicon-germanium nanowire heterojunctions: Optical and electrical properties
… strong current instabilities associated with flicker noise and damped oscillations with frequencies close to 10-30 MHz. Flicker (or 1/f ) noise is characterized and analyzed on carrier number fluctuation model and mobility fluctuation model noise mechanism, respectively. The proposed …
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High Performance Broadband Photodetectors Based on Graphene/Semiconductor Heterostructures
… from deep-UV to MIR at varying optical powers. Noise behaviors have been studied under different device parameters such as device structure, area and gate-bias. Results show that the flicker noise of graphene-based devices can be explained by the McWhorter model in which the fluctuation of …
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Electrical characterization of high-k gate dielectrics for advanced CMOS gate stacks
… the high-k dielectrics and how EOT impacts on noise mechanism time zero 1/f noise is characterized on thick and thin oxide FinFET transistors, respectively. The extracted noise models suggest that as a function of temperatures and bias conditions the flicker noise mechanism tends to be carrier …
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A jittered-sampling correction technique for ADCs
… Converters (ADCs) jittered sampling raises the noise floor; this leads to a decrease in its Signal to Noise ratio (SNR) and its effective number of bits (ENOB). This research studies a technique that compensate for the effects of sampling with a jittered clock. A thorough understanding of …
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Využití šumové diagnostiky k analýze vlastností solárních článků
Diplomová práce se zabývá šumovou diagnostikou fotovoltaických článků. Popisuje hlavní druhy šumů, které vznikající v solárních článcích. Zkoumané vzorky byly roztřízeny na kvalitní a spolehlivé pomocí šumových spolehlivostních indikátorů. Vzorky byly zkoumány pomocí měření VA charakteristik, …