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Ultra Low Power Capacitive Sensor Interfaces

  • Book
  • © 2007

Overview

Authors:
  1. Wouter Bracke

    1. Catholic University of Leuven, Belgium

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  2. Robert Puers

    1. Catholic University of Leuven, Belgium

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  3. Chris Hoof

    1. IMEC vzw, Belgium

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  • Low power sensor interface
  • How to desing to obtain maximal flexiblity for the sensor specifications (generic)
  • Capacitive sensor interface with wide range capabiliies

Part of the book series: Analog Circuits and Signal Processing (ACSP)

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Table of contents (6 chapters)

  1. Front Matter

    Pages I-X
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  2. Introduction

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 1-3

  3. Generic architectures for autonomous sensors

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 5-15

  4. Generic Sensor Interface Chip

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 17-72

  5. Algorithm for optimal configuration settings

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 73-85

  6. Physical Activity Monitoring System

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 87-90

  7. Conclusion

    • Wouter Bracke, Robert Puers, Chris Van Hoof
    Pages 91-94

  8. Back Matter

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Keywords

About this book

The increasing performance of smart microsystems merging sensors, signal processing and wireless communication promises to have a pervasive impact during the coming decade. These autonomous microsystems nd applications in sport evaluation, health care, environmental monitoring and automotive s- tems. They gather data from the physical world, convert them to electrical form, compensate for interfering variables or non-linearities, and either act - rectly on them or transfer it to other systems. Most often, these sensor systems are developed for a speci c application. This approach leads to a high rec- rent design cost. A generic front-end architecture, where only the sensors and the microcontroller software are customized to the selected application, would reduce the costs signi cantly. This work presents a new generic architecture for autonomous sensor nodes. The modular design methodology provides a exible way to build a complete sensor interface out of con gurable blocks. The settings of these blocks can be optimized according to the varying needs of the application. Furthermore, the system can easily be expanded with new building blocks. The modular system is illustrated in a Generic Sensor Interface Chip (GSIC) for capa- tive sensors. Many con guration settings adapt the interface to a broad range of applications. The GSIC is optimized for ultra low power consumption. It achieves an ON-state current consumption of 40?A.

Authors and Affiliations

  • Catholic University of Leuven, Belgium

    Wouter Bracke, Robert Puers

  • IMEC vzw, Belgium

    Chris Hoof

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