Frequency compensation of CMOS operational amplifier.

Ho Kin-Pui.Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.Includes bibliographical references (leaves 92-95).Abstracts in English and Chinese.Abstract --- p.2摘要 --- p.4Acknowledgements --- p.5Table of Contents --- p.6List of Figures --- p.10List of Tables --- p.14Chapter Chapter 1 --- Introduction --- p.15Overview --- p.15Objective --- p.17Thesis Organization --- p.17Chapter Chapter 2 --- Fundamentals of Operational Amplifier --- p.19Chapter 2.1 --- Definitions of Commonly Used Figures --- p.19Chapter 2.1.1 --- Input Differential Voltage Range --- p.19Chapter 2.1.2 --- Maximum Output Voltage Swing --- p.20Chapter 2.1.3 --- Input Common Mode Voltage Range --- p.20Chapter 2.1.4 --- Input Offset Voltage --- p.20Chapter 2.1.5 --- Gain Bandwidth Product --- p.21Chapter 2.1.6 --- Phase Margin --- p.22Chapter 2.1.7 --- Slew Rate --- p.22Chapter 2.1.8 --- Settling Time --- p.23Chapter 2.1.9 --- Common Mode Rejection Ratio --- p.23Chapter 2.2 --- Frequency Compensation of Operational Amplifier --- p.24Chapter 2.2.1 --- Overview --- p.24Chapter 2.2.2 --- Miller Compensation --- p.25Chapter Chapter 3 --- CMOS Current Feedback Operational Amplifier --- p.27Chapter 3.1 --- Introduction --- p.27Chapter 3.2 --- Current Feedback Operational Amplifier with Active Current Mode Compensation --- p.28Chapter 3.2.1 --- Circuit Description --- p.29Chapter 3.2.2 --- Small Signal analysis --- p.32Chapter 3.2.3 --- Simulation Results --- p.34Chapter Chapter 4 --- Reversed Nested Miller Compensation --- p.38Chapter 4.1 --- Introduction --- p.38Chapter 4.2 --- Frequency Response --- p.39Chapter 4.2.1 --- Gain-bandwidth product --- p.40Chapter 4.2.2 --- Right half complex plane zero --- p.40Chapter 4.2.3 --- The Pair of Complex Conjugate Poles --- p.42Chapter 4.3 --- Components Sizing --- p.47Chapter 4.4 --- Circuit Simulation --- p.48Chapter Chapter 5 --- Enhancement Technique for Reversed Nested Miller Compensation --- p.54Chapter 5.1 --- Introduction --- p.54Chapter 5.2 --- Working principle of the proposed circuit --- p.54Chapter 5.2.1 --- The introduction of nulling resistor --- p.55Chapter 5.2.2 --- The introduction of a voltage buffer --- p.55Chapter 5.2.3 --- Small Signal Analysis --- p.57Chapter 5.2.4 --- Sign Inversion of the RHP Zero with Nulling Resistor --- p.59Chapter 5.2.5 --- Frequency Multiplication of the Complex Conjugate Poles --- p.60Chapter 5.2.6 --- Stability Conditions --- p.63Chapter 5.3 --- Performance Comparison --- p.67Chapter 5.4 --- Conclusion: --- p.70Chapter 5.4.1 --- Circuit Modifications: --- p.70Chapter 5.4.2 --- Advantages: --- p.71Chapter Chapter 6 --- Physical Design of Operational Amplifier --- p.72Chapter 6.1 --- Introduction --- p.72Chapter 6.2 --- Transistor Layout Techniques --- p.72Chapter 6.2.1 --- Multi-finger Layout Technique --- p.72Chapter 6.2.2 --- Common-Centroid Structure --- p.73Chapter 6.3 --- Layout Techniques of Passive Components --- p.74Chapter 6.3.1 --- Capacitor Layout --- p.74Chapter 6.3.2 --- Resistor Layout --- p.75Chapter Chapter 7 --- Measurement Results --- p.77Chapter 7.1 --- Overview --- p.77Chapter 7.2 --- Measurement Results for the Current Feedback Operational Amplifier --- p.77Chapter 7.2.1 --- Frequency Response of the inverting amplifier --- p.77Chapter 7.3 --- Measurement Results for the Three-Stage Operational Amplifier --- p.80Chapter 7.3.1 --- Input Offset Voltage Measurement --- p.80Chapter 7.3.2 --- Input Common Mode Range Measurement --- p.80Chapter 7.3.3 --- Gain Band width Measurement --- p.81Chapter 7.3.4 --- DC Gain measurement --- p.85Chapter 7.3.5 --- Slew Rate Measurement --- p.87Chapter 7.3.6 --- Phase Margin --- p.88Chapter 7.3.7 --- Performance Summary --- p.89Chapter Chapter 8 --- Conclusions --- p.90Chapter Chapter 9 --- Appendix --- p.9

Unified volterra series analysis of injection locked oscillators.

by Fan Chun-Wah.Thesis (M.Phil.)--Chinese University of Hong Kong, 1998.Includes bibliographical references (leaves 90-[91]).Abstract also in Chinese.Chapter CHAPTER 1: --- INTRODUCTION --- p.1Chapter CHAPTER 2: --- BACKGROUND OF INJECTION LOCKING --- p.3Chapter 2.1 --- Basics of Injection Locking --- p.3Chapter 2.2 --- Analytical Methods for Injection Locking --- p.6Chapter 2.2.1 --- Analysis of Fundamental Mode Injection Locking --- p.6Chapter 2.2.2 --- Analysis of Ha rmonic/Subharmonic Injection Locking --- p.9Chapter 2.4 --- Numerical Methods --- p.11Chapter CHAPTER 3: --- THE VOLTERRA SERIES METHOD FOR NONLINEAR CIRCUIT ANALYSIS --- p.13Chapter 3.1 --- Volterra Expansion --- p.14Chapter 3.2 --- Evaluation of Nonlinear Transfer Function --- p.16Chapter 3.2.1 --- Probing Method --- p.16Chapter 3.2.2 --- Nonlinear Current Method --- p.17Chapter 3.2.3 --- Higher order nonlinear current --- p.20Chapter 3.2.4 --- Voltage response by using nonlinear transfer function --- p.20Chapter 3.3 --- Advantage of Volterra Series --- p.21Chapter 3.4 --- Volterra Series Simulator(VSS) Implementation --- p.22Chapter 3.4.1 --- Admittance Matrix Formulation --- p.22Chapter 3.4.2 --- Evaluation of Nonlinear Response --- p.26Chapter 3.4.3 --- Local Cache and Global Cache --- p.26Chapter 3.4.4 --- Components Library --- p.27Chapter 3.4.5 --- Verification of Simulator --- p.27Chapter CHAPTER 4: --- VOLTERRA SERIES GENERAL INJECTION-LOCKED OSCILLATOR FORMULATION --- p.28Chapter 4.1 --- Volterra Series Approach to Analysis of Autonomous System --- p.29Chapter 4.1.1 --- Chua and Tang's work --- p.29Chapter 4.1.2 --- Cheng and Everard's work --- p.29Chapter 4.1.3 --- Huang and Chu 's work --- p.30Chapter 4.2 --- A Novel Approach --- p.33Chapter 4.3 --- Derivation of Determining Equation --- p.35Chapter 4.4 --- Injection Lock vector and circuit synthesis --- p.38Chapter 4.5 --- Modification to Volterra Series Simulator (VSS) --- p.40Chapter CHAPTER 5: --- CIRCUIT MODELING AND PARAMETER EXTRACTION --- p.42Chapter 5.1 --- Forward-Bias Gate Measurement --- p.42Chapter 5.2 --- Low FREQUENCY S-PARAMETER MEASUREMENT --- p.50Chapter 5.3 --- Parameter Extraction from High Frequency S-Parameter Data --- p.52Chapter 5.3.1 --- Direct Extraction Method --- p.52Chapter 5.3.2 --- Estimation of lead inductance --- p.56Chapter 5.4 --- Large Signal Characterization and Extraction --- p.59Chapter 5.4.1 --- Large Signal Model --- p.59Chapter 5.4.2 --- Extraction of g2 and g3 --- p.60Chapter 5.5 --- Equivalent circuit model for inductor and capacitor --- p.67Chapter CHAPTER 6: --- APPLICATION TO 1/3 ANALOG FREQUENCY DIVIDER --- p.68Chapter 6.1 --- Oscillator design by negative resistance approach --- p.68Chapter 6.2 --- Simulation of Free Running Oscillation by VSS --- p.73Chapter 6.3 --- Simulation of injection locked oscillator by VSS --- p.75Chapter 6.4 --- Injection Locking Experiment --- p.77Chapter 6.5 --- Injection Lock Vector --- p.80Chapter CHAPTER 7: --- CONCLUSIONS AND RECOMMENDATIONS FOR FUTURE WORK --- p.85Chapter 7.1 --- Conclusions --- p.85Chapter 7.2 --- Recommendations for Future Work --- p.86APPENDIX 1: REFERENCES --- p.87APPENDIX 2: PUBLICATION --- p.9

Spectral LADAR: Active Range-Resolved Imaging Spectroscopy

Imaging spectroscopy using ambient or thermally generated optical sources is a well developed technique for capturing two dimensional images with high per-pixel spectral resolution. The per-pixel spectral data is often a sufficient sampling of a material's backscatter spectrum to infer chemical properties of the constituent material to aid in substance identification. Separately, conventional LADAR sensors use quasi-monochromatic laser radiation to create three dimensional images of objects at high angular resolution, compared to RADAR. Advances in dispersion engineered photonic crystal fibers in recent years have made high spectral radiance optical supercontinuum sources practical, enabling this study of Spectral LADAR, a continuous polychromatic spectrum augmentation of conventional LADAR. This imaging concept, which combines multi-spectral and 3D sensing at a physical level, is demonstrated with 25 independent and parallel LADAR channels and generates point cloud images with three spatial dimensions and one spectral dimension. The independence of spectral bands is a key characteristic of Spectral LADAR. Each spectral band maintains a separate time waveform record, from which target parameters are estimated. Accordingly, the spectrum computed for each backscatter reflection is independently and unambiguously range unmixed from multiple target reflections that may arise from transmission of a single panchromatic pulse. This dissertation presents the theoretical background of Spectral LADAR, a shortwave infrared laboratory demonstrator system constructed as a proof-of-concept prototype, and the experimental results obtained by the prototype when imaging scenes at stand off ranges of 45 meters. The resultant point cloud voxels are spectrally classified into a number of material categories which enhances object and feature recognition. Experimental results demonstrate the physical level combination of active backscatter spectroscopy and range resolved sensing to produce images with a level of complexity, detail, and accuracy that is not obtainable with data-level registration and fusion of conventional imaging spectroscopy and LADAR. The capabilities of Spectral LADAR are expected to be useful in a range of applications, such as biomedical imaging and agriculture, but particularly when applied as a sensor in unmanned ground vehicle navigation. Applications to autonomous mobile robotics are the principal motivators of this study, and are specifically addressed

Applications of hybrid and digital computation methods in aerospace-related sciences and engineering

The computing equipment in the engineering systems simulation laboratory of the Houston University Cullen College of Engineering is described and its advantages are summarized. The application of computer techniques in aerospace-related research psychology and in chemical, civil, electrical, industrial, and mechanical engineering is described in abstracts of 84 individual projects and in reprints of published reports. Research supports programs in acoustics, energy technology, systems engineering, and environment management as well as aerospace engineering

The characteristics and the implications of electrical activity within the nervous system

Abstract Not Provided

Development and experimental verification of damping enhancement methodologies for space structures

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.Includes bibliographical references.by Nesbitt Ward Hagood IV.M.S