A Low Power Detection Method for Small Ultrasonic Echo Signals

E.A. Dijkstra, W. Olthuis, J. Holsheimer, P. Bergveld

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


    Spinal cord stimulation is used for the management of chronic, intractable pain and vascular insufficiency. However, when stimulating at a constant voltage, the current density in the spinal cord changes due to the varying separation dbetween the spinal cord and the stimulating electrode, thus, preventing a stable clinical effect. In order to control the stimulation of spinal nerve fibers, a closed-loop system using ultrasonic delay time detection is being developed. This system is based on pulse-echo measurements using a piezoelectric transducer. The spinal cord stimulation system is an implanted system. Therefore, low power consumption (μW) is an important requirement. A low power electronic circuit is developed to detect the small echo signals (mV) from the spinal cord. The detection method is based on amplitude demodulation of the echo signal. The method is simulated in MATLAB, and the simulation results are compared to the results of a simulated matched filter method. The amplitude demodulation method shows results similar to the matched filter method.
    Original languageEnglish
    Title of host publicationSensor technology in the Netherlands - state of the art
    Subtitle of host publicationproceedings of the Dutch Sensor Conference, 2-3 March, 1998, University of Twente, the Netherlands
    EditorsA. van den Berg, P. Bergveld
    Place of PublicationDordrecht
    PublisherKluwer Academic Publishers
    Number of pages5
    ISBN (Electronic)978-94-011-5010-1
    ISBN (Print)978-94-010-6103-2
    Publication statusPublished - 2 Mar 1998
    EventDutch Sensor Conference 1998: Sensor Technology in the Netherlands: State of the Art - University of Twente, Enschede, Netherlands
    Duration: 2 Mar 19983 Mar 1998

    Publication series

    NameMESA monographs
    PublisherKluwer Academic Publishers


    ConferenceDutch Sensor Conference 1998


    • Piezoelectric transducer
    • Ultrasound
    • Spinal cord stimulation
    • Signal processing


    Dive into the research topics of 'A Low Power Detection Method for Small Ultrasonic Echo Signals'. Together they form a unique fingerprint.

    Cite this