Index Catalog // ScholarsArchive@OSU

Prediction of phase noise and jitter in ring oscillators

Creator:: Barton, Nathen
Abstract:: This thesis presents distinctly different methods of accurately predicting phase noise and absolute jitter in ring oscillators. The phase noise prediction methods are the commercially available SpectreRF and isf_tool, a simulator developed in this work from the Hajimiri and Lee theory of phase noise. Absolute jitter due to deterministic supply...
Resource Type:: Masters Thesis
Full Text:: simulator developed in this work from the Hajimiri and Lee theory of phase noise. Absolute jitter due to

Ultra-low energy digital controller for battery-free wireless sensor network nodes

Creator:: Nasroullahi, Mohsen
Abstract:: This thesis presents a low-energy application specific digital controller for a battery-free 2.4 GHz wireless sensor network (WSN) node. The digital controller has been designed and fabricated in a standard 0.13 μm CMOS and implements a simple protocol for WSNs. Techniques such as supply voltage reduction and power gating have...
Resource Type:: Masters Thesis

A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

Creator:: Miller, Brian A.
Abstract:: This thesis presents a low power DC-DC converter suitable for harvesting energy from high impedance thermoelectric generators (TEGs) for the use in body powered electronics. The chip has been fabricated in a 130nm CMOS technology. To meet the power demands of body powered networks, a novel dual-path architecture capable of...
Resource Type:: Masters Thesis

Analysis and design of CMOS RF LNAs with ESD protection

Creator:: Chandrasekhar, Vinay
Abstract:: An analysis that accounts for the effect of standard electrostatic discharge (ESD) structures on critical LNA specifications of noise figure, input matching and gain is presented. It is shown that the ESD structures degrade LNA performance particularly for higher frequency applications. Two LNAs, one with ESD protection and one without,...
Resource Type:: Masters Thesis

Substrate noise coupling in ring oscillator-based phase locked loops

Creator:: Shreeve, Robert
Abstract:: In this thesis, the performance degradation of a phase-locked loop due to substrate noise is examined. A new analytical equivalent circuit model for substrate noise coupling is derived for a heavily doped silicon substrate. The model has been validated with measured data from a 0.35 μm CMOS process. Since the...
Resource Type:: Masters Thesis
Full Text:: Jim Lee enabled the measurement of PLL parameters for this work. Significant thanks is also extended

Ultra-low energy digital logic controller design for wireless sensor networks

Creator:: Meliza, Stephen W.
Abstract:: Low energy design techniques for digital circuits are examined to determine their suitability for use in a digital logic controller for wireless sensor network nodes. Transistor level simulations are used to evaluate the techniques and those demonstrating an energy reduction are used to implement a digital logic controller. The digital...
Resource Type:: Masters Thesis
Full Text:: , Triet Lee, Thomas Brown, James Ayers, Napong Panitantum, Adam Heiberg, Hector Oporta, Farhad Farah

Efficient RF energy scavenging and ultra-low power management for powering wireless sensor nodes

Creator:: Arumugam, Vikrant P.
Abstract:: As the demand for real-time information in engineering and health care systems keeps increasing, the need for wireless sensor nodes is also continuously increasing. As a result, the cost and effort involved in installing and maintaining batteries to power the numerous sensor nodes is growing exponentially. Providing a cost effective...
Resource Type:: Masters Thesis

Coupled circuit and device simulations for design of RF MEMS VCOs

Creator:: Behera, Manas
Abstract:: A new coupled circuit and electrostatic/mechanical simulator (COSMO) for the design of RF MEMS VCOs is presented in this thesis. The numerical solution of device level equations is used to accurately compute the capacitance of a MEMS capacitor. This coupled with a circuit simulator facilitates the simulation of circuits incorporating...
Resource Type:: Masters Thesis

Ground tap placement and sizing to minimize substrate noise coupling in RF LNAs

Creator:: Sundaresan, Arathi
Abstract:: The substrate noise injected by a stepped buffer circuit into two single-ended 1.5GHz low noise amplifiers is examined for a heavily doped 0.25µm CMOS process. The difference in the LNA noise rejection is characterized as a function of the size and placement of substrate contacts. The use of a resistive...
Resource Type:: Masters Thesis

Comparison of time-domain and frequency-domain phase noise analyses

Creator:: Vytyaz, Igor
Abstract:: This thesis presents a comparison of time-domain and frequency-domain algorithms for phase noise calculation in oscillators. Floquet theory provides the mathematical foundation for these calculations and the numerical methods employ perturbation projection vectors (PPVs). The PPVs are an estimate of an oscillator's sensitivity to noise. The in-house circuit simulator SPICE3...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Prediction of phase noise and jitter in ring oscillators

Ultra-low energy digital controller for battery-free wireless sensor network nodes

A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

Analysis and design of CMOS RF LNAs with ESD protection

Substrate noise coupling in ring oscillator-based phase locked loops

Ultra-low energy digital logic controller design for wireless sensor networks

Efficient RF energy scavenging and ultra-low power management for powering wireless sensor nodes

Coupled circuit and device simulations for design of RF MEMS VCOs

Ground tap placement and sizing to minimize substrate noise coupling in RF LNAs

Comparison of time-domain and frequency-domain phase noise analyses

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