Wireless Mobile Communication and Healthcare. Third International Conference, MobiHealth 2012, Paris, France, November 21-23, 2012, Revised Selected Papers

Research Article

An Analog Front-End and ADC Integrated Circuit for Implantable Force and Orientation Measurements in Joint Prosthesis

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  • @INPROCEEDINGS{10.1007/978-3-642-37893-5_33,
        author={Steve Tanner and Shafqat Ali and Mirjana Banjevic and Arash Arami and Kamiar Aminian and Willyan Hasenkamp and Arnaud Bertsch and Philippe Renaud and Pierre-Andr\^{e} Farine},
        title={An Analog Front-End and ADC Integrated Circuit for Implantable Force and Orientation Measurements in Joint Prosthesis},
        proceedings={Wireless Mobile Communication and Healthcare. Third International Conference, MobiHealth 2012, Paris, France, November 21-23, 2012, Revised Selected Papers},
        proceedings_a={MOBIHEALTH},
        year={2013},
        month={4},
        keywords={kinematics prosthesis strain gauge telemetry front-end integrated circuit ADC monitoring implantable electronic},
        doi={10.1007/978-3-642-37893-5_33}
    }
    
  • Steve Tanner
    Shafqat Ali
    Mirjana Banjevic
    Arash Arami
    Kamiar Aminian
    Willyan Hasenkamp
    Arnaud Bertsch
    Philippe Renaud
    Pierre-André Farine
    Year: 2013
    An Analog Front-End and ADC Integrated Circuit for Implantable Force and Orientation Measurements in Joint Prosthesis
    MOBIHEALTH
    Springer
    DOI: 10.1007/978-3-642-37893-5_33
Steve Tanner1,*, Shafqat Ali1,*, Mirjana Banjevic1, Arash Arami1, Kamiar Aminian1, Willyan Hasenkamp1, Arnaud Bertsch1, Philippe Renaud1, Pierre-André Farine1,*
  • 1: Ecole Polytechnique Fédérale de Lausanne
*Contact email: steve.tanner@epfl.ch, shafqat.ali@epfl.ch, pierre-andre.farine@epfl.ch

Abstract

The paper presents an analogue front-end and ADC integrated circuit for processing signals of sensors implanted into joint prosthesis. The circuit is designed to be operated with Wheatstone bridge sensors, such as strain gauges, pressure, Hall Effect, magneto-resistive sensors, etc. It performs sensor supply multiplexing, sensor signal amplification with chopper modulation, offset compensation and 14-bit analog to digital conversion in a single chip. It can operate simultaneously up to eight sensors at an overall bandwidth of 8 kHz, and can be directly interfaced to a remotely powered RFID system in order to constitute a complete multi-sensor, low-power, small size and externally powered micro-system. Integrated into a 180 nm CMOS process, it measures 5 mm, is supplied with 1.8 Volt and consumes 1.8 mW.