title: A field-programmable analog array development platform for vestibular prosthesis signal processing.
abstract: We report on a vestibular prosthesis signal processor realized using an experimental field programmable analog array (FPAA). Completing signal processing functions in the analog domain, the processor is designed to help replace a malfunctioning inner ear sensory organ, a semicircular canal. Relying on angular head motion detected by an inertial sensor, the signal processor maps angular velocity into meaningful control signals to drive a current stimulator. To demonstrate biphasic pulse control a 1 k Ω resistive load was placed across an H-bridge circuit. When connected to a 2.4 V supply, a biphasic current of 100 μA was maintained at stimulation frequencies from 50-350 Hz, pulsewidths from 25-400 μ sec, and interphase gaps ranging from 25-250 μsec.
authors.affiliation: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0250, USA. toreyin@gatech.edu
authors.forename: Hakan
authors.initials: H
authors.lastname: Töreyin
authors.forename: Pamela
authors.initials: P
authors.lastname: Bhatti
mesh_terms: D000465:Algorithms; D000818:Animals; D001698:Biomedical Engineering; D007758:Ear, Inner / Q000473:pathology; D004567:Electrodes, Implanted; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D006801:Humans; D009991:Oscillometry; D019736:Prostheses and Implants; D011474:Prosthesis Design; D012815:Signal Processing, Computer-Assisted; D012984:Software; D014725:Vestibular Nerve / Q000473:pathology*