An energy-efficient analog front-end circuit for a sub-1-V digital hearing aid chip.

A low-power energy-efficient adaptive analog front-end circuit is proposed and implemented for digital hearing-aid applications. It adopts the combined-gain-control (CGC) technique for accurate preamplification and the adaptive-SNR (ASNR) technique to improve dynamic range with low power consumption...

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Bibliographic Details
Published in:	IEEE Journal of solid state circuits 41, 4 (2006).
Main Author:	Sunyoung Kim
Format:	Article
Language:	English
Subjects:	0.25 micron. 0.9 V. 59.4 muW. 74.7 muW. CMOS technology. Adaptive SNR technique. Analog front-end circuit. Automatic gain control. Combined-gain-control technique. Digital hearing aid chip. Exponential gain control. Input-referred noise voltage. Signal-to-noise ratio. Third-order sigma-delta modulator. Threshold knee voltage.