论文信息 - Digitally-Programmable and Personalizable CMOS Hearing Aid Circuit

Digitally-Programmable and Personalizable CMOS Hearing Aid Circuit

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.

[1] M. Mauthe,et al. A Micropower CMOS Circuit for Hearing Aids , 1990, ESSCIRC '90: Sixteenth European Solid-State Circuits Conference.

[2] F. Callias,et al. A set of four ICs in CMOS technology for a programmable hearing aid , 1989 .

[3] W.M.C. Sansen,et al. A micropower low-noise monolithic instrumentation amplifier for medical purposes , 1987 .

[4] Edgar Sanchez-Sinencio,et al. Programmable switched-capacitor bump equalizer architecture , 1990 .

[5] Guido Torelli,et al. Fully differential basic building blocks based on fully differential difference amplifiers with unity-gain difference feedback , 1995 .