Title :
A 126-μW cochlear chip for a totally implantable system
Author :
Georgiou, Julius ; Toumazou, Christopher
Author_Institution :
Electr. Eng. Dept., Imperial Coll., London, UK
Abstract :
A single-chip speech processor/stimulator is presented for use in a totally implanted cochlear prosthesis system. It implements a continuous interleaved sampling (CIS) strategy. By combining the speech processor and the stimulator into one mixed-signal chip, both size and power are reduced sufficiently, so as to make a totally implanted system feasible. First silicon has been validated and typically operates at 126 μW (excluding cochlear stimulation currents).
Keywords :
analogue processing circuits; audio signal processing; ear; hearing aids; mixed analogue-digital integrated circuits; power consumption; prosthetics; silicon; speech processing; 126 muW; Si; analog signal processing; cochlear chip; cochlear implant; cochlear prosthesis system; continuous interleaved sampling; implantable system; micropower; mixed-signal chip; single-chip speech processor-stimulator; subthreshold; Biomedical signal processing; Circuits; Cochlear implants; Electrodes; Hearing aids; Prosthetics; Pulse width modulation; Speech processing; Surface impedance; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.840959
