multibit delta sigma ADC DAC error correction

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A Fully Digital Technique for the Estimation and Correction of the DAC Error in
Multi-bit Delta Sigma ADCs.
by
Xuesheng Wang
A DISSERTATION
submitted to
Oregon State University
in partial fulfillment of
the requirement for the
degree of
Doctor of Philosophy
Completed December 1, 2003
Commencement June 2004

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TABLE OF CONTENTS
Page
Chapter 1 Introduction.......................................................................................... 1
1.1 Motivation................................................................................................2
1.2 DAC error in multi-bit delta sigma ADC................................................. 3
1.3 Purpose of this work ................................................................................ 5
1.4 Dissertation structure ...............................................................................5
Chapter 2 Oversampling delta sigma ADCs: Background ................................... 8
2.1 Sampling and quantization....................................................................... 9
2.2 Oversampling and noise shaping ........................................................... 12
2.3 Single-bit vs. multi-bit quantization....................................................... 17
Chapter 3 Error of multi-bit DAC and earlier techniques to deal with it ........... 20
3.1 Model of multi-bit unit-element based DAC ......................................... 21
3.1.1 Extra gain and the DAC error ............................................................... 22
3.1.2 Impact on the ADC output .................................................................... 24
3.2 Dynamic element matching (DEM)....................................................... 29
3.3 Correction techniques ............................................................................ 33
3.4 Fully digital DAC error detection and correction .................................. 38
3.5 Conclusions............................................................................................ 39
Chapter 4 Fully digital estimation and correction of the DAC error.................. 40
4.1 Correlation ............................................................................................. 41
4.2 Decorrelating and scrambling ................................................................ 43
4.3 Eliminating mutual interferences when recovering unit-element errors 45
4.4 High-pass filter to suppress the input signal .......................................... 49
4.5 Complete block diagram of the proposed technique.............................. 52
4.6 Simulations............................................................................................. 54
4.6.1 2-0 MASH ADC ................................................................................... 54
4.6.2 Simulation results.................................................................................. 56
4.7 Conclusion ............................................................................................. 62
Chapter 5 Working with adaptive compensation for noise leakage ................... 66
5.1 MASH structure and noise leakage........................................................ 66
5.2 Adaptive compensation for noise leakage ............................................. 67
5.3 Digital DAC correction working with adaptive compensation.............. 68
5.4 Conclusion ............................................................................................. 69
Chapter 6 An experimental ADC ....................................................................... 71
6.1 Design motivation and design goals ...................................................... 71
6.2 System architecture ................................................................................ 72
6.3 Circuit design ......................................................................................... 73
6.3.1 Design of opamps.................................................................................. 74
6.3.2 Size of input sample capacitors............................................................. 76
6.4 Measurement results .............................................................................. 77
6.5 Conclusion ............................................................................................. 83
Chapter 7 Summary and future work.................................................................. 84
7.1 Summary ................................................................................................ 84

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A fully digital technique for the estimation and correction of the DAC error in multi-bit delta-sigma ADCs.part1.rar 1.90 MB
A fully digital technique for the estimation and correction of the DAC error in multi-bit delta-sigma ADCs.part2.rar 632 KB
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关于multibit delta sigma的数字校正内容
也就是understanding 那本书中没有详细讲的东西

sssh

看看吧·

fanbuliao

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s8553warrior

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englishbear

3x very very much

nathanee

thanks for sharing

minahua

DEM可是个好东西呀