Browsing by Author "Paasi, Ari"

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    CMOS Analog Integrated Circuits for Cochlear Implant System
    (Uva Wellassa University of Sri Lanka, 2012) Duminda Kumara, L. A.; Paasi, Ari; Fdirisinghe, Mahesh
    For centuries, people believed that it's a miracle to restore hearing to the complete disability of hearing (deaf). About forty years ago scientists first attempted to restore normal hearing to the deaf by electrical stimulation of the auditory nerve (Philipos, 1998). With the modern developments, the auditory sensations elicited by electrical stimulation give comfortable hearing for the deaf people. Final product of the latest research called "cochlear implant",which can be implanted in the inner ear and can restore partial hearing to profoundly deaf people.Patients withcochlear implants can now communicate without lip-reading or signing, and some can communicate even over the telephone. This paper describes the design and simulation of a low power signal processor which can be used as analog signal processor of main Cochlear implant system using 0.13 um CMOS technology. The signal processor circuit which is made up of band pass filter, envelop detector and dual slope convertor are based on newly design operational transconductance amplifier (OTA).The propose system has been designed using CMOS technology by means of Cadence CAD tool. The simulations were performed under normal condition using Hspice Simulator and Cscope graphical circuit simulator software for Linux.