E-Book, Englisch, 104 Seiten
Bracke / Puers / Hoof Ultra Low Power Capacitive Sensor Interfaces
1. Auflage 2007
ISBN: 978-1-4020-6232-2
Verlag: Springer Netherlands
Format: PDF
Kopierschutz: 1 - PDF Watermark
E-Book, Englisch, 104 Seiten
Reihe: Analog Circuits and Signal Processing
ISBN: 978-1-4020-6232-2
Verlag: Springer Netherlands
Format: PDF
Kopierschutz: 1 - PDF Watermark
This book describes ultra low power capacitive sensor interfaces, and presents the realization of a very low power generic sensor interface chip that is adaptable to a broad range of capacitive sensors. The book opens by reviewing important design aspects for autonomous sensor systems, discusses different building blocks, and presents the modular architecture for the generic sensor interface chip. Finally, the generic sensor interface chip is shown in state-of-the-art applications.
Autoren/Hrsg.
Weitere Infos & Material
1;Contents;6
2;Foreword;9
3;INTRODUCTION;11
4;GENERIC ARCHITECTURES FOR AUTONOMOUS SENSORS;14
4.1;1. Introduction;14
4.2;2. Multisensor microsystem;15
4.2.1;2.1 Sensors;15
4.2.2;2.2 Sensor interface chip;16
4.2.3;2.3 Microcontroller;17
4.2.4;2.4 Wireless link;18
4.2.5;2.5 Power management;18
4.3;3. Modular design methodology;19
4.3.1;3.1 Programming flow;20
4.3.2;3.2 Operational flow;22
4.4;4. Conclusion;23
5;GENERIC SENSOR INTERFACE CHIP;25
5.1;1. Introduction;25
5.2;2. Capacitive sensors;26
5.3;3. Generic Sensor Interface Chip for capacitive sensors;28
5.4;3.1 Front-end architecture;29
5.4.1;3.2 Capacitance-to-Voltage convertor;32
5.4.2;3.3 Chopping scheme;36
5.4.3;3.4 SC amplifier;37
5.4.4;3.5 S. modulator;41
5.4.5;3.6 Bandgap reference, bias system and buffered reference voltage;50
5.4.6;3.7 Main clock, clock generation circuits and LF clock;56
5.5;4. Configuration settings;59
5.6;5. Noise;61
5.6.1;5.1 Bennet model;61
5.6.2;5.2 Noise calculations;62
5.6.3;5.3 Effective number of bits;67
5.7;6. Experimental results;68
5.7.1;6.1 Pressure monitoring system;70
5.7.2;6.2 Inclination monitoring system;73
5.8;7. Performance comparison;77
5.9;8. Conclusion;78
6;ALGORITHM FOR OPTIMAL CONFIGURATION SETTINGS;81
6.1;1. Introduction;81
6.2;2. Programmability;81
6.2.1;2.1 Full-scale loss;82
6.2.2;2.2 Programmability of Cref;83
6.2.3;2.3 Programmability of Cf;84
6.2.4;2.4 Programmability of ASC;88
6.2.5;2.5 Noise;90
6.3;3. Optimal settings;91
6.4;4. Results;92
6.5;5. Conclusion;93
7;PHYSICAL ACTIVITY MONITORING SYSTEM;94
7.1;1. Introduction;94
7.2;2. Background and motivation;94
7.3;3. Implementation;95
7.4;4. Conclusion;97
8;CONCLUSION;98
8.1;1. Realized developments;98
8.2;2. Suggestions for future work;100
9;References;102
10;Index;109
