Title :
Digitally-Programmable and Personalizable CMOS Hearing Aid Circuit
Author :
Duque-Carrillo, J.F. ; Malcovati, P. ; Maloberti, F. ; Pérez-Aloe, R. ; Reyes, A.H. ; Sánchez-Sinencio, E. ; Torelli, G. ; Valverde, J.M.
Author_Institution :
Department of Electronic and Electromechanical Engineering, University of Extremadura, (06071) Badajoz, Spain.
Abstract :
A CMOS mixed-mode fully-differential signal processor, that constitutes the core of a hearing aid system, is introduced in this paper. The circuit is fully and remotely controllable by means of dual-tone multifrequency (DTMF) encoded tones, transmitted by an external unit. A general description of the whole system is provided, and the implementations of some outstanding parts are covered in more detail. The circuit has been fabricated in 1.2 ¿m CMOS n-well process. It operates from a single 1.3-V battery, consumes tipically less than 1 mA and occupies 28 mm2 of silicon. Experimental results of the described parts are also reported.
Keywords :
Auditory system; Batteries; CMOS digital integrated circuits; CMOS process; Deafness; Filters; Gain control; Preamplifiers; Signal processing; Tuning;
Conference_Titel :
Solid-State Circuits Conference, 1995. ESSCIRC '95. Twenty-first European
Conference_Location :
Lille, France
Print_ISBN :
2-86332-180-3
