Title :
A single battery, 0.9 V operated digital sound processing IC including AD/DA and IR receiver with 2 mW power consumption
Author :
Neuteboom, H. ; Janssens, M.A.E. ; Leenen, J.R.G.M. ; Kup, B.M.J. ; Dijkmans, E.C. ; de Koning, B. ; Frowijn, V.A.J. ; de Bleecker, R.D.N. ; van der Zwan, E.J. ; Note, S.M.M. ; Zong-Liang Wu ; Masschelein, M.S.R.
Author_Institution :
Philips Electron. Integrated Circuits Lab., Eindhoven, Netherlands
Abstract :
The sound processing on this chip is done digitally by a programmable DSP processor. The sound processing algorithms are stored in an on-chip RAM. A new algorithm can be downloaded into the RAM through an infrared (IR) remote control. The onboard A/D and D/A converter and IR receiver make this chip a complete stand alone system, needing only a battery, a microphone and/or telecoil, an earphone, an IR diode and few external components. Applications are in hearing instruments and related products. The chip is supplied by a single 1.3V battery, runs at 1MHz clock frequency and consumes only 2mW in full functional mode. The audio sample rate is 16kHz. The dynamic ranges of the A/D and D/A converter (including digital filters, noise shaper and output amplifiers) are 80dBA and 93dBA respectively. The THD of the overall signal path is better than -45dB. The chip is manufactured in a standard low-threshold 0.8/spl mu/m CMOS process.
Keywords :
CMOS integrated circuits; analogue-digital conversion; audio signals; digital signal processing chips; digital-analogue conversion; mixed analogue-digital integrated circuits; 0.8 micron; 0.9 V; 2 mW; A/D converter; CMOS process; D/A converter; IR receiver; THD; audio sample rate; clock frequency; digital filters; digital sound processing IC; full functional mode; hearing instruments; noise shaper; on-chip RAM; output amplifiers; overall signal path; power consumption; programmable DSP processor; Auditory system; Batteries; Clocks; Digital integrated circuits; Digital signal processing chips; Diodes; Headphones; Instruments; Microphones; Optical receivers;
Conference_Titel :
Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3721-2
DOI :
10.1109/ISSCC.1997.585279
