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An ultra-low power analogue directionality system for digital hearing aids

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3 Author(s)
Corbishley, P. ; Imperial Coll., London, UK ; Rodriguez-Villegas, E. ; Toumazou, C.

An ultra-low power analogue system used to provide adaptive directionality in hearing aids is proposed. A digital algorithm converter to analogue is shown to be considerably more power efficient. Power reduction is obtained by designing all the circuit blocks in a CMOS technology using transistors in weak inversion. The system performs comparably to a digital equivalent in terms of the algorithm but with a total power consumption of 5 μW at a power supply voltage of 900 mV.

Published in:

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on  (Volume:1 )

Date of Conference:

23-26 May 2004