A MEMS-based power-scalable hearing aid analog front end

Ilker Deligoz; Syed R. Naqvi; Tino Copani; Sayfe Kiaei; Bertan Bakkaloglu; Sang Soo Je; Junseok Chae

doi:10.1109/TBCAS.2010.2079329

A MEMS-based power-scalable hearing aid analog front end

Ilker Deligoz, Syed R. Naqvi, Tino Copani, Sayfe Kiaei, Bertan Bakkaloglu, Sang Soo Je, Junseok Chae

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

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 μ W 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-μ m complementary metaloxide semciconductor TSMC process.

Original language	English (US)
Article number	5611627
Pages (from-to)	201-213
Number of pages	13
Journal	IEEE transactions on biomedical circuits and systems
Volume	5
Issue number	3
DOIs	https://doi.org/10.1109/TBCAS.2010.2079329
State	Published - Jun 2011

Keywords

Continuous time sigma-delta modulation
digital hearing aids
directional microphone array
microelectromechanical-systems (MEMS) microphone

ASJC Scopus subject areas

Biomedical Engineering
Electrical and Electronic Engineering

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10.1109/TBCAS.2010.2079329

Cite this

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title = "A MEMS-based power-scalable hearing aid analog front end",

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 μ W 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-μ m complementary metaloxide semciconductor TSMC process.",

keywords = "Continuous time sigma-delta modulation, digital hearing aids, directional microphone array, microelectromechanical-systems (MEMS) microphone",

author = "Ilker Deligoz and Naqvi, {Syed R.} and Tino Copani and Sayfe Kiaei and Bertan Bakkaloglu and Je, {Sang Soo} and Junseok Chae",

note = "Funding Information: Manuscript received March 24, 2010; revised June 24, 2010; accepted August 27, 2010. Date of publication October 28, 2010; date of current version May 25, 2011. This work was supported by the National Science Foundationm Research to Aid Persons with Disabilities Program under Grants 062777 and 0652136. This paper was recommended by Associate Editor D. Cumming.",

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AU - Copani, Tino

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AU - Bakkaloglu, Bertan

AU - Je, Sang Soo

AU - Chae, Junseok

N1 - Funding Information: Manuscript received March 24, 2010; revised June 24, 2010; accepted August 27, 2010. Date of publication October 28, 2010; date of current version May 25, 2011. This work was supported by the National Science Foundationm Research to Aid Persons with Disabilities Program under Grants 062777 and 0652136. This paper was recommended by Associate Editor D. Cumming.

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N2 - 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 μ W 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-μ m complementary metaloxide semciconductor TSMC process.

AB - 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 μ W 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-μ m complementary metaloxide semciconductor TSMC process.

KW - Continuous time sigma-delta modulation

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KW - directional microphone array

KW - microelectromechanical-systems (MEMS) microphone

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A MEMS-based power-scalable hearing aid analog front end

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Keywords

ASJC Scopus subject areas

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