Session 10-5

Dual Threshold Preamplifier and Multi-Channel DSP for
Human Factored Digital Hearing Aid Chip
Electret Earphone

 

Abstract

The low-power, high-programmability digital hearing aid chip with consideration of human factors is implemented. To achieve the human factored design with low-power consumption, the dual threshold preamplifier and the multi-channel digital signal processor (DSP) are designed. The dynamic range of the dual threshold preamplifier exists from 0.45-V to 0.8-V and dissipates 32-uW from a single 0.9-V supply. The core area of the preamplifier and the DSP are 0.057-mm2 and 0.5-mm2 respectively in a 0.18-um CMOS technology.