Integrated Front-end Analog Circuits for MEMS Sensors: -in Ultrasound Imaging and Optical Grating Based Microphone - Couverture souple

Qureshi, Muhammad

 
9783843367738: Integrated Front-end Analog Circuits for MEMS Sensors: -in Ultrasound Imaging and Optical Grating Based Microphone
Couverture souple
ISBN 10 : 3843367736 ISBN 13 : 9783843367738
Editeur : LAP Lambert Academic Publishing, 2010

Synopsis

Micro-scaling makes MEMS sense capacitance small in a CMUT array element for intravascular ultrasound imaging. Smaller sensors lead to a lower active-to- parasitic ratio and thus, degrades sensitivity. Here capacitive feedback charge amplifier is shown as an alternative approach to resistive feedback amplifier. Capacitive feedback charge amplifier provides high sensitivity, small area, low distortion and power saving. This approach of charge amplifiers is also suitable in capacitive microphones where it provides low power and high sensitivity. In the case of biomimetic microphone structure, optical detection overcomes capacitive detection's thermal noise issues. Also with micro-scaling, optical detection overcomes the increased parasitics without any sensitivity degradation, unlike capacitive detection. For hearing aids, along with sensitivity, battery life is another challenge. We propose the use of 1- bit front-end sigma-delta ADC for overall improved hearing aid power efficiency. Front-end interface based on envelope detection and synchronous detection have also been designed. Circuit techniques are used for maximizing signal handling with low supplies.

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À propos de l'auteur

Muhammad Shakeel Qureshi received his PhD in electrical & computer engineering from Georgia Institute of Technology in 2009. He has worked at Texas Instruments, National Semiconductor and Intel. Currently he is a Post-Doc analog circuit designer and researcher at Hewlett Packard Labs. He is a member of Eta Kappa Nu and Sigma Xi Honor Society.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP Lambert Academic Publishing
Date d'édition
2010
Langue
anglais
ISBN 10 
3843367736
ISBN 13 
9783843367738
Reliure
Broché
Nombre de pages
120
Coordonnées du fabricant
non disponible
Personne responsable
KreGa Onlinehandel GmbH
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Autres éditions populaires du même titre

9781244091573: Integrated Front-End Analog Circuits for Mems Sensors in Ultrasound Imaging and Optical Grating Based Microphone

Edition présentée

ISBN 10 :  124409157X ISBN 13 :  9781244091573
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Couverture souple