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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- 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
- Partial requirement for: Ph. D., Arizona State University, 2011Note typethesis
- Includes bibliographical references (p. 83-85)Note typebibliography
- Field of study: Electrical engineering