Ultra Low-Power ANSI S1.11 Filter Bank for Digital Hearing Aids

Abstract

This paper presents an ANSI S1.11-compliant filter bank for digital hearing aids, of which the power consumption is minimized through algorithmic, numerical and architectural optimizations. This filter bank has been implemented and fabricated using the TSMC 0.13 mu m CMOS technology. The transistor-level simulations show that the power dissipation is only 79 mu W for 24KHz & 18-band audio processing.