Description
A dual-channel directional digital hearing aid (DHA) front-end using a fully differential difference amplifier (FDDA) based Microphone interface circuit (MIC) for a capacitive Micro Electro Mechanical Systems (MEMS) microphones and an adaptive-power analog font end (AFE) is presented. The Microphone interface circuit based on FDDA converts the capacitance variations into voltage signal, achieves a noise of 32 dB SPL (sound pressure level) and an SNR of 72 dB, additionally it also performs single to differential conversion allowing for fully differential analog signal chain.
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Contributors
- Naqvi, Syed Roomi (Author)
- Kiaei, Sayfe (Thesis advisor)
- Bakkaloglu, Bertan (Committee member)
- Chae, Junseok (Committee member)
- Barnby, Hugh (Committee member)
- Aberle, James T., 1961- (Committee member)
- Arizona State University (Publisher)
Date Created
- 2011
Subjects
- Electrical Engineering
- Biomedical Engineering
- Adaptive Signal to Noise ratio
- Continuous Time Sigma Delta
- Digital Hearing Aids
- Dual Channel
- Feedback DAC
- Fully Differential Difference Amplifier
- Differential amplifiers
- Microelectromechanical Systems
- Hearing aids--Design and construction.
- Speech processing systems--Noise.
- Speech processing systems
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Note
- Partial requirement for: Ph. D., Arizona State University, 2011Note typethesis
- Includes bibliographical references (p. 83-85)Note typebibliography
- Field of study: Electrical engineering
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Statement of Responsibility
by Syed Roomi Naqvi