Methodology_for_the_Digital_Calibration_of_Analog_Circuits_and_Systems

meidinlei

Methodology_for_the_Digital_Calibration_of_Analog_Circuits_and_Systems (Book).rar

meidinlei

Methodology_for_the_Digital_Calibration_of_Analog_Circuits_and_Systems (Book)

Contents
List of Figures xi
List of Tables xvii
1. INTRODUCTION 1
1 Context 1
2 Objectives 2
3 Compensation methodology 2
4 Applications of the compensation methodology 2
5 Book organization 3
2. AUTOCALIBRATION AND COMPENSATION TECHNIQUES 5
1 Introduction 5
2 Matching 5
2.1 Matching rules 6
2.2 Matching parameters 6
3 Chopper stabilization 7
3.1 Principle 7
3.2 Analysis 8
3.3 Implementation 9
4 Autozero 11
4.1 Principle 11
4.2 Analysis 12
4.3 Noise 14
5 Correlated double sampling
6 Ping-pong
7 Other techniques
Digital Calibration of Analog Circuits and Systvi ems
8 Classification
9 Conclusion
3. DIGITAL COMPENSATION CIRCUITS AND SUB-BINARY DIGITAL-
TO-ANALOG CONVERTERS
1 Introduction
2 Digital compensation
3 Successive approximations
3.1
3.2 Working condition
3.3 Reverse successive approximations algorithm
3.4
4 Sub-binary radix DACs
4.1 Use of sub-binary DACs for successive approximations
4.2
4.3
4.4 Tolerance to radix variations
5 Component arrays
5.1
6 Current sources
6.1 Current-mirror DAC
7 R/2R ladders
8 Linear current division using MOS transistors
8.1
8.2 Second-order effects
8.3 Parallel configuration
8.4 Series configuration
9 M/2M ladders
9.1
9.2 Complementary ladder
9.3 Second-order effects
9.4
10 R/xR ladders
10.1
10.2 Working condition
10.3 Terminator calculation
10.4 Terminator implementation
10.5 Ladder sizing
10.6 Terminator sizing

Principle 25
28
29
Complexity 31
31
31
Characteristics 32
Resolution 34

Contents vii
10.7
11 M/2+M ladders
11.1 M/3M ladders
11.2 M/2.5M ladders
11.3 Ladder selection and other M/2+M ladders
11.4 Current collector design
11.5 Complementary ladders
11.6
11.7
12 Comparison
13 Linear DACs based on M/2+M converters
13.1
13.2 Calibration algorithm
13.3 Radix conversion algorithm
13.4 Digital circuit implementation
13.5 Analog circuit implementation
13.6 Compensation of temperature variations
13.7 Comparison with other self-calibrated converters
14 Conclusion
4. METHODOLOGY FOR CURRENT-MODE DIGITAL COMPENSATION
OF ANALOG CIRCUITS
1 Introduction
2 Two-stage Miller operational amplifier
3 Compensation current technique
3.1 Detection configuration
3.2 Detection node
3.3 Compensation node
3.4 DAC resolution
3.5 Low-pass decision filtering
3.6 Continuous-time compensation
3.7 Up/down DAC
4 Simulation with digital compensation circuits
4.1
4.2 Automatic compensation component
4.3 Compensation component during adjustment
4.4 Compensation component during compensation
4.5 Multiple digital compensation
4.6 Example of implementation for PSpice
Radix 60

Digital Calibration of Analog Circuits and Systviii ems
4.7 Offset compensation of the Miller amplifier
5 Application to SOI 1T DRAM calibration
5.1 1-transistor SOI memory cell
5.2 Memory cell imperfections
5.3 Sensing scheme
5.4 Calibration principle
5.5 Calibration algorithm
5.6
6 Conclusion
5. HALL MICROSYSTEM WITH CONTINUOUS DIGITAL GAIN
CALIBRATION
1 Introduction
2 Integrated Hall sensors
2.1 Hall effect
2.2 Hall sensors
2.3 Hall sensor models
3 Spinning current technique
4 Sensitivity calibration of Hall sensors
4.1 Sensitivity drift of Hall sensors
4.2 Integrated reference coils
4.3 Sensitivity calibration
4.4 State of the art
5 Hall sensor microsystems
5.1 Analog front-ends for current measurement
6 Continuous digital gain calibration technique
6.1
6.2 Combined modulation scheme
6.3 Demodulation schemes
6.4 Gain compensation
6.5 Offset compensation
6.6 Noise filtering
6.7 Delta-sigma analog-to-digital converter
6.8 Rejection of signal interferences
7 Conclusion
6. IMPLEMENTATION OF THE HALL MICROSYSTEM WITH CONTINUOUS
CALIBRATION
1 Introduction

Contents ix
2 Hall sensor array
3 Preamplifier
3.1 Programmable gain range preamplifier
3.2
3.3 Operational amplifier
4 Demodulators
4.1 Switched-capacitor integrators
4.2 External signal demodulator
4.3 Reference demodulator
4.4 Offset demodulator
5 Delta-sigma modulator
6 System improvements
6.1
Coil-sensor capacitive coupling

Measurement results
8 Conclusion
1
2 Main contributions
3 Perspectives
References
Index

Compensation of the reference demodulator offset

System integration
225
External interferences 226
Alternate modulation/demodulation schemes 227

Integrated circuit 231
Configuration and measurement possibilities

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