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A MEMS-Based Power-Scalable Hearing Aid Analog Front End.
- Source :
- IEEE Transactions on Biomedical Circuits & Systems; Jun2011, Vol. 5 Issue 3, p201-213, 13p
- Publication Year :
- 2011
-
Abstract
- A dual-channel directional digital hearing aid front end using microelectromechanical-systems microphones, and an adaptive-power analog processing signal chain are presented. The analog front end consists of a double differential amplifier-based capacitance-to-voltage conversion circuit, 40-dB variable gain amplifier (VGA) and a power-scalable continuous time sigma delta analog-to-digital converter (ADC), with 68-dB signal-to-noise ratio dissipating 67 \muW from a 1.2-V supply. The MEMS microphones are fabricated using a standard surface micromachining technology. The VGA and power-scalable ADC are fabricated on a 0.25-\mum complementary metal–oxide semciconductor TSMC process. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 19324545
- Volume :
- 5
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Biomedical Circuits & Systems
- Publication Type :
- Academic Journal
- Accession number :
- 60967659
- Full Text :
- https://doi.org/10.1109/TBCAS.2010.2079329