Title :
A DSP-based hearing instrument IC
Author :
Neuteboom, Harry ; Kup, Ben M J ; Janssens, Mark
Author_Institution :
Integrated Circuit Lab., Philips Consumer Electron., Eindhoven, Netherlands
fDate :
11/1/1997 12:00:00 AM
Abstract :
This paper presents a digital signal processing IC, including AD/DA converters, for one-chip hearing instruments. An on-chip infrared remote control receiver is used to load a program Into the digital signal processor (DSP). The complete IC consumes 2 mW from a single cell battery and operates with supply voltages down to 0.9 V. The oversampling A/D and D/A converters show a dynamic range of 77 and 93 dBA, respectively. Only a few external capacitors are needed. The chip area is 35 mm2 in a low-threshold 0.8-μm CMOS process
Keywords :
CMOS integrated circuits; automatic gain control; data conversion; digital signal processing chips; hearing aids; telecontrol; 0.8 mum; 0.9 V; 2 mW; AD/DA converters; DSP-based hearing instrument; digital signal processing IC; dynamic range; infrared remote control receiver; low-threshold CMOS process; oversampling converters; supply voltages; Auditory system; Batteries; Digital integrated circuits; Digital signal processing; Digital signal processing chips; Digital signal processors; Dynamic range; Instruments; Optical receivers; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
