digital compensation of dynamic acquisition errors at the front-end of ...

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Table of Contents Abstract...........................................................................................................................v Acknowledgments ........................................................................................................vii Table of Contents ...........................................................................................................x List of Tables...............................................................................................................xiii List of Figures..............................................................................................................xiv Chapter 1 Introduction ..............................................................................................1 1.1 Motivation ..................................................................................................1 1.2 Organization ...............................................................................................4 Chapter 2 Nonlinearity at the ADC’s Front-End....................................................7 2.1 Analog-to-Digital Converters.....................................................................7 2.2 Overview of ADC linearity limitations ....................................................10 2.3 Nonlinearity at the acquisition stage ........................................................14 2.3.1 Input dependent charge injection......................................................14 2.3.2 Nonlinearity in the tracking phase....................................................22 2.3.3 Modeling tracking nonlinearity ........................................................25 2.4 Nonlinearity in the input circuit ...............................................................26 2.4.1 Input circuit including transformer...................................................28 2.4.2 Input circuit including amplifier.......................................................33 2.5 Summary...................................................................................................34 x
Chapter 3 Digital Correction of Dynamic Nonlinearities .....................................37 3.1 Dynamic error correction using look-up tables ........................................38 3.2 Modeling nonlinear systems with memory using Volterra series ............40 3.3 Proposed digital algorithm .......................................................................41 3.3.1 Digital Correction using linear modeling of the derivative..............42 3.3.1.1 Evaluation of the model: Random noise input…………………44 3.3.1.2 Evaluation of the model: Sinewave input……………………...48 3.3.2 Digital correction using interpolation...............................................50 3.3.2.1 How to do the interpolation?.......................................................51 3.3.2.2 Evaluation of the model………………………………………..52 3.3.3 Nonlinearity correction on a multi-tone input signal .......................56 3.3.4 Algorithm performance in presence of noise ...................................58 3.3.5 Algorithm performance in presence of other circuit non-idealities..59 3.4 Summary...................................................................................................62 Chapter 4 Experimental Results .............................................................................65 4.1 ADC test setup..........................................................................................66 4.2 Implementation of the digital post processing..........................................67 4.2.1 Digital correction scheme.................................................................67 4.2.2 Coefficient calibration ......................................................................69 4.3 Measurement results.................................................................................70 4.3.1 Robustness of the algorithm with temperature variations ................72 4.3.1.1 Analysis of the impact of temperature variation on dynamic nonlinearity.......................................................................................................73 4.3.2 General applicability of the algorithm..............................................75 xi
Page 1 and 2: DIGITAL COMPENSATION OF DYNAMIC ACQ
Page 3: I certify that I have read this dis
Page 6 and 7: apply the inverse nonlinear functio
Page 8 and 9: Dr. Echere Iroaga, Dr. Yangjin Oh,
Page 12 and 13: 4.3.3 Algorithm performance on diff
Page 14 and 15: List of Figures Figure 1.1: Block d
Page 16 and 17: Figure 3.1: Block diagram of ADC er
Page 18 and 19: Figure 4.4: Frequency spectrum of t
Page 21 and 22: Chapter 1 Introduction 1.1 Motivati
Page 23 and 24: Chapter 1: Introduction 3 cancel th
Page 25 and 26: Chapter 1: Introduction 5 to correc
Page 27 and 28: Chapter 2 Nonlinearity at the ADC
Page 29 and 30: Chapter 2: Nonlinearity at the ADC
Page 57 and 58: Chapter 3 Digital Correction of Dyn
Page 59 and 60: Chapter 3: Digital Correction of Dy
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Chapter 3: Digital Correction of Dy
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Chapter 4 Experimental Results In t
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Chapter 4: Experimental Results 67
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Chapter 5 Impact of Substrate Noise
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Chapter 5: Impact of Substrate Nois
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Chapter 6 Conclusion 6.1 Summary IF
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Chapter 6: Conclusion 95 very sensi
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Chapter 6: Conclusion 97 the desire
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Appendix A TCAD Simulation of a Tra
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Appendix A: TCAD Simulation of Trac
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Appendix A: TCAD Simulation of Trac
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Appendix B Modeling Signal Derivati
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Appendix B: Modeling Signal Derivat
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Appendix C Coefficient Calibration
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Appendix C: Coefficient Calibration
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Bibliography [1] A.M.A. Ali et al.,
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Bibliography 115 [23] J. Kuo, R. Du
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Bibliography 117 [46] F. H. Irons,
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Bibliography 119 [68] B. Razavi, B.
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