Witte / Makinwa / Huijsing Dynamic Offset Compensated CMOS Amplifiers

1. Auflage 2009
ISBN: 978-90-481-2756-6
Verlag: Springer Netherlands
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 168 Seiten

Reihe: Analog Circuits and Signal Processing

Dynamic Offset-Compensated CMOS Amplifiers describes the theory, design and realization of dynamic offset compensated CMOS amplifiers. It focuses on the design of general-purpose wide-band operational amplifiers and instrumentation amplifiers.
Two offset compensation techniques are described: auto-zeroing and chopping. Several topologies are discussed, with which these techniques can be used in the design of wide-band dynamic offset-compensated amplifiers. Four implementations are discussed in detail: two low-offset wide-band operational amplifiers, a low-offset instrumentation amplifier, and a low-offset current-sense amplifier, which can sense the current drawn from supply voltages up to 28V .

Co-author Emeritus Prof. J.H. Huijsing has (co-)authored numerous books for Springer, including the best-selling Operational Amplifiers (2000)

Autoren/Hrsg.

Witte, Frerik

Makinwa, Kofi

Huijsing, Johan

Inhaltsverzeichnis

1;Preface;10
2;Acknowledgements;11
3;1 Introduction;13
3.1;1.1 Motivation;13
3.2;1.2 Offset;15
3.2.1;1.2.1 Drain current mismatch;16
3.2.2;1.2.2 Folded cascode amplifier offset;17
3.2.3;1.2.3 Minimizing offset;18
3.3;1.3 Challenges;19
3.4;1.4 Organisation of the book;20
3.5;1.5 References;22
4;2 Dynamic Offset Compensation Techniques ;24
4.1;2.1 Introduction;24
4.2;2.2 Auto-zero amplifiers;25
4.2.1;2.2.1 Output offset storage;25
4.2.2;2.2.2 Input offset storage;27
4.2.3;2.2.3 Auxiliary amplifier;28
4.2.4;2.2.4 Noise in auto-zero amplifiers;30
4.3;2.3 Chopper amplifiers;34
4.3.1;2.3.1 Noise in chopper amplifiers;36
4.3.2;2.3.2 Chopped operational amplifier in a feedback network;37
4.3.3;2.3.3 Charge injection effects in chopper amplifiers;38
4.4;2.4 Chopped auto-zeroed amplifier;40
4.5;2.5 Switching non-idealities;42
4.5.1;2.5.1 Charge injection reduction tactics;44
4.5.2;2.5.2 Charge injection suppression circuits;47
4.6;2.6 Conclusions;51
4.7;2.7 References;51
5;3 Dynamic Offset Compensated Operational Amplifiers;54
5.1;3.1 Introduction;54
5.2;3.2 Ping-pong operational amplifier;55
5.3;3.3 Offset-stabilized amplifiers;56
5.3.1;3.3.1 Auto-zero offset-stabilized amplifiers;58
5.3.2;3.3.2 Chopper offset-stabilized amplifiers;59
5.3.3;3.3.3 Frequency compensation;61
5.3.4;3.3.4 Chopper stabilized amplifiers with ripple filters;66
5.3.5;3.3.5 Chopper and auto-zero stabilized amplifiers;69
5.4;3.4 Chopper offset-stabilized chopper amplifiers;70
5.4.1;3.4.1 Iterative offset-stabilization;72
5.5;3.5 Conclusions;74
5.6;3.6 References;75
6;4 Dynamic Offset Compensated Instrumentation Amplifiers;78
6.1;4.1 Introduction;78
6.1.1;4.1.1 Current-feedback instrumentation amplifiers;80
6.2;4.2 Dynamic offset compensated instrumentation amplifiers;85
6.2.1;4.2.1 Chopper instrumentation amplifier;86
6.2.2;4.2.2 Auto-zeroed instrumentation amplifier;87
6.2.3;4.2.3 Ping-pong instrumentation amplifier;89
6.2.4;4.2.4 Ping-pong-pang instrumentation amplifier;89
6.2.5;4.2.5 Offset-stabilized instrumentation amplifiers;90
6.2.6;4.2.6 Chopper offset-stabilized chopper instrumentation amplifier;93
6.3;4.3 Conclusions;93
6.4;4.4 References;93
7;5 Realizations of Operational Amplifiers 5;96
7.1;5.1 Introduction;96
7.2;5.2 Chopper offset-stabilized operational amplifier;97
7.2.1;5.2.1 Topology;97
7.2.2;5.2.2 Circuits;102
7.2.3;5.2.3 Measurement results;109
7.3;5.3 Chopper and auto-zero offset-stabilized operational amplifier;115
7.3.1;5.3.1 Topology;115
7.3.2;5.3.2 Circuits;118
7.4;5.3.3 Measurement results;123
7.5;5.4 Conclusions;126
7.6;5.5 References;127
8;6 Realizations of Instrumentation Amplifiers;128
8.1;6.1 Introduction;128
8.2;6.2 Low-offset indirect current-feedback instrumentation amplifier;129
8.2.1;6.2.1 Introduction;129
8.2.2;6.2.2 Topology;129
8.2.3;6.2.3 Circuits;133
8.2.4;6.2.4 Measurement results;135
8.3;6.3 High-side current-sense amplifier;140
8.3.1;6.3.1 Current-sensing;140
8.3.2;6.3.2 Topology;144
8.3.3;6.3.3 Circuits;149
8.3.4;6.3.4 Measurement results;154
8.4;6.4 Conclusions ;158
8.5;6.5 References;160
9;7 Conclusions and Future Directions;162
9.1;7.1 Conclusions;162
9.2;7.2 Future directions;162
10;A Layout Issues;166
10.1;A.1 Introduction;166
10.2;A.2 Chopper layout;168
10.3;A.3 Clock shielding;171
10.4;A.4 Conclusion;173
10.5;A.5 References;173
11;About the Authors;174
12;Index;177