A low-power ASK demodulator for inductively coupled implantable electronics

Gunnar Gudnason

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    An amplitude shift keying (ASK) demodulator is presented which is suitable for implantable electronic devices that are powered through an inductive link. The demodulator has been tested with carrier frequencies in the range 1-15 MHz, covering most commonly used frequencies. Data rates up to several 100kbit/s are supported, suitable for complex implants such as stimulating electrode arrays or visual implants. The circuit is compatible with modulation depths in the range 10-100%. The low end of the range permits data transmission without significant reduction in power transfer, or the use of transmitter designs with limited modulation capability. The power consumption is 60 μW from a 3 V supply. The circuit has been implemented in a standard CMOS process.
    Original languageEnglish
    Title of host publicationProceedings of the 26th European Solid-State Circuits Conference
    Publication date2000
    Publication statusPublished - 2000
    Event26th European Solid-State Circuits Conference - Stockholm, Sweden
    Duration: 19 Sept 200021 Sept 2000
    Conference number: 26


    Conference26th European Solid-State Circuits Conference

    Bibliographical note

    Copyright: 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE


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