Full metadata
Title
Adaptive signal to noise ratio scalable analog front-end continuous time sigma delta converter for digital hearing aids
Description
A dual-channel directional digital hearing aid (DHA) front end using Micro Electro Mechanical System (MEMS) microphones and an adaptive-power analog processing signal chain is presented. The analog front end consists of a double differential amplifier (DDA) based capacitance to voltage conversion circuit, 40dB variable gain amplifier (VGA) and a continuous time sigma delta analog to digital converter (CT - ΣΔ ADC). Adaptive power scaling of the 4th order CT - ΣΔ achieves 68dB SNR at 120μW, which can be scaled down to 61dB SNR at 67μW. This power saving will increse the battery life of the DHA.
Date Created
2010
Contributors
- Deligoz, Ilker (Author)
- Kiaei, Sayfe (Thesis advisor)
- Bakkaloglu, Bertan (Committee member)
- Jalali-Farahani, Bahar (Committee member)
- Aberle, James T., 1961- (Committee member)
- Chae, Junseok (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
viii, 62 p. : ill. (some col.)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.8696
Statement of Responsibility
Ilker Deligoz
Description Source
Viewed on Jan. 17, 2012
Level of coding
full
Note
thesis
Partial requirement for: Ph.D., Arizona State University, 2010
bibliography
Includes bibliographical reference (p. 51-53)
Field of study: Electrical engineering
System Created
- 2011-08-12 02:49:01
System Modified
- 2021-08-30 01:56:39
- 3 years 2 months ago
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