900mV programmable gain amplifier for cochlear implants

Author

Gebara, Fadi H. ; Martin, Sergio Miguel ; Marsman, Eric D. ; Kraver, Keith L. ; Brown, Richard B.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

fYear

2004

fDate

1-3 Dec. 2004

Abstract

Power consumption and device area are two critical specifications in implantable cochlear systems. CMOS process scaling has afforded significant area reduction but has increased the difficulty in designing analog circuits due to reduced voltage head room and lower output impedances. In this paper, a programmable gain amplifier (PGA), which is suitable for a full cochlear implant is presented. The core of the PGA is a low-power, low-voltage, switched operational amplifier. The PGA, fabricated in TSMC´s 0.18μm CMOS process, operates from a 900mV supply with a measured power consumption of less then 45μW. These results align favorably with fully implantable systems.

Keywords

CMOS analogue integrated circuits; ear; hearing aids; operational amplifiers; prosthetics; 900 mV; CMOS process scaling; analog circuits; cochlear implants; device area; low-power low-voltage switched operational amplifier; power consumption; programmable gain amplifier; Cochlear implants; Computational Intelligence Society; Ear; Electrodes; Electronics packaging; Hair; Microphones; Signal processing; Speech processing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems, 2004 IEEE International Workshop on

Print_ISBN

0-7803-8665-5

Type

conf

DOI

10.1109/BIOCAS.2004.1454112

Filename

1454112