Keystone-Education-Center-CS_Comprehensive-Plan.30553335
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Keystone-Education-Center-CS_Comprehensive-Plan.30553335
ABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335ART DUST RADIO Yiming Zhai, Doctor of Philosophy, 2010Directed By:Professor Neil Goldsman Department of Electrical and Computer EngineeringThis dissertation focuses on exploring two low power adaptive circuits. One is an adaptive filter at audio frequency for system identification. The other is a te Keystone-Education-Center-CS_Comprehensive-Plan.30553335mperature insensitive oscillator for low power radio frequency communication.The adaptive filter is presented with integrated learning rules for modelKeystone-Education-Center-CS_Comprehensive-Plan.30553335
reference estimation. Hie system is a first order low pass filter with two parameters: gain and cut-off frequency. It is implemented using multiple iABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335 in a system identification task. Simulation results show that convergence is slower using simplified control laws but still occurs within milliseconds. Experimental results confirm that the estimated gain and cut-off frequency track the corresponding parameters of the reference filter. During opera Keystone-Education-Center-CS_Comprehensive-Plan.30553335tion, deterministic enol's are introduced by mismatch within the analog circuitimplementation. An analysis is presented which attributes the errors toKeystone-Education-Center-CS_Comprehensive-Plan.30553335
current mirror mismatch. The harmonic distortion of the filter operating in different inversion is analyzed using EKV model numerically.The temperatuABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335S transistors instead of LC tank for less chip area and power consumption. The frequency variance with temperature is compensated by the temperature adaptive circuits. Experimental results show that the frequency stability from 5°c to 65°c has been improved 10 limes with automatic compensation and a Keystone-Education-Center-CS_Comprehensive-Plan.30553335t least 1 order less power is consumed than published competitors. This oscillator is applied in a 2.2GHz OOK transmitter and a 2.2GHz phase locked loKeystone-Education-Center-CS_Comprehensive-Plan.30553335
op based FM receiver.With the increasing needs of compact antenna, possible high data rate and wide unused frequency range of short distance communicaABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335ency demodulation is demonstrated in the simulation results that the PLL can lock in 0.5ps with 35MHz lock-in range and 2MHz detection resolution. The model of a phase locked loop used for BFSK receiver is analyzed using Matlab.LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE. LOG DOMAIN FILTER ANDALOW POWE Keystone-Education-Center-CS_Comprehensive-Plan.30553335R TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMART DUST RADIOByYiming ZhaiDissertation submitted to the Faculty of the Graduate School of the UniveKeystone-Education-Center-CS_Comprehensive-Plan.30553335
rsity 0Í Maryland, College Park, in partial fulfillment OÍ the requirements for the degree of Doctor of Philosophy2010Advisory Committee:Prolessor NeiABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335 Zhai 2010https://khothuvien.cori!AcknowledgementsI would like to acknowledge people who have contributed to the projects and helped me during my Ph.D. study and research.The first two persons I want to thank are my current and previous advisor, Professor Neil Goldsman and Professor Pamela Abshire. Keystone-Education-Center-CS_Comprehensive-Plan.30553335I want to thank them not only because of their broad knowledge and their profound insights, but also because of their decent, warm, sensitive and cariKeystone-Education-Center-CS_Comprehensive-Plan.30553335
ng personality. They gave me a promising and significant research project, strong encouragement and full support. 1 would like to thank them for theirABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335has spent an enormous amount of time to help me to solve the testing problems and work on the circuits. I wish to thank Dr. Yanyi Wong who was a research partner in the project and taught me a lot about the use of HSPICE simulator and MAGIC layout tool.I gladly express my gratitude to Dr. Zeynep Dil Keystone-Education-Center-CS_Comprehensive-Plan.30553335li, Dr. Bo Yang, Dr. Thomas Salter, Dr. Chung-Ching Shen and Bo Li for their kind assistance and useful discussions in the smart dust project. WithoutKeystone-Education-Center-CS_Comprehensive-Plan.30553335
them struggling with me together, this dissertation would not have been possible right now.I wish to thank Professor Ankur Srivastava, Professor MartABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMA Keystone-Education-Center-CS_Comprehensive-Plan.30553335arents and beloved husband for their unconditional support and love.iiTable of ContentsAcknowledgements..........................................................iiTable of Contents........................................................iiiChapter 1: Overview.......................................... Keystone-Education-Center-CS_Comprehensive-Plan.30553335..............1ABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMAABSTRACTTitle of Document:LOW POWER ADAPTIVE CIRCUITS: AN ADAPTIVE LOG DOMAIN FILTER AND A LOW POWER TEMPERATURE INSENSITIVE OSCILLATOR APPLIED IN SMAGọi ngay
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