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Wireless Implantable EMG Sensing Microsystem

Farnsworth, Bradley David
http://rave.ohiolink.edu/etdc/view?acc_num=case1276263665

Abstract Details

2010, Master of Sciences (Engineering), Case Western Reserve University, EECS - Electrical Engineering.
An implantable wireless electromyogram sensing microsystem is developed for control of powered prostheses. RF powering and wireless data link enable real-time wireless operation. EMG signals are interfaced with a capacitively-coupled differential amplifier with 1 kHz bandwidth and an input-referred voltage noise power spectral density of 78 nV/√(Hz). The EMG signal is digitized by an on-chip 11 bit cyclic ADC. A Class-E amplifier operating at 8 MHz drives a 2-cm spiral coil, inductively coupled to an implantable 6-mm spiral coil. RF energy is rectified and regulated on-chip to produce stable 2.1V and 2.7V supplies. Manchester-encoded EMG data are transmitted by PSK modulation. The ASIC fabricated in the AMI 1.5μm CMOS process occupies 2.2x2.2 mm2 and dissipates 350 μW from RF powering. The system achieves 9.35 ENOB under battery powering and 8.6 ENOB under RF power, equivalent to an input detectable signal of 5.4 μVRMS and 9 μVRMS, respectively. In vivo testing shows a background EMG signal of 20 μVRMS, limiting system sensing resolution.
Darrin Young, PhD (Advisor)
Francis Merat, PhD (Committee Member)
Triolo Ronald, PhD (Committee Member)
114 p.
Biomedical Research; Electrical Engineering; Engineering; Rehabilitation
wireless; implantable; emg; electromyogram; moderate; inversion; subthreshold; class-e; rf powering; psk; phase shift keying; inductive coupling; near field; low power

Recommended Citations

Citations

  • Farnsworth, B. D. (2010). Wireless Implantable EMG Sensing Microsystem [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1276263665

    APA Style (7th edition)

  • Farnsworth, Bradley. Wireless Implantable EMG Sensing Microsystem. 2010. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1276263665.

    MLA Style (8th edition)

  • Farnsworth, Bradley. "Wireless Implantable EMG Sensing Microsystem." Master's thesis, Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1276263665

    Chicago Manual of Style (17th edition)

case1276263665
2,801
© 2010, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.