Title :
Designing programmable hearing aids using BiCMOS
Author_Institution :
Micro-Rel/Medtronic, Tempe, AZ, USA
Abstract :
BiCMOS is used for digitally programmable hearing aids. The analog signal processing function is implemented with bipolar circuits to provide amplification, automatic gain control (AGC), and filtering in the time-continuous domain, while digital logic and memory are implemented using standard cell CMOS. With on-chip chrome-silicon resistors and poly-to-p+ capacitors, a 17.8-mm2 chip has been designed that includes long time-constant integrators
Keywords :
BiCMOS integrated circuits; automatic gain control; hearing aids; mixed analogue-digital integrated circuits; AGC; BiCMOS; Cr-Si; amplification; analog signal processing function; automatic gain control; digital logic; digitally programmable; filtering; long time-constant integrators; memory; onchip resistors; poly-to-p+ capacitors; programmable hearing aids; standard cell CMOS; time-continuous domain; Automatic logic units; BiCMOS integrated circuits; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS logic circuits; Digital filters; Digital signal processing; Filtering; Gain control; Hearing aids;
Conference_Titel :
ASIC Conference and Exhibit, 1992., Proceedings of Fifth Annual IEEE International
Conference_Location :
Rochester, NY
Print_ISBN :
0-7803-0768-2
DOI :
10.1109/ASIC.1992.270258
