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Pressure Sensing Using Electrostatic Capacitance
Key Engineering Materials, 2006Piezoelectric ceramic pressure sensors have been attracted great interest due to their simple and miniature structure compared with conventional sensors such as strain gauge sensor. A new type of static pressure sensor by using a change of permittivity upon applied mechanical pressure has been studied in this work.
Noriko Bamba +3 more
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Bioinspired flow-sensing capacitive microphone
The Journal of the Acoustical Society of AmericaInspired by the auditory systems of small animals, such as spiders, the tachinid fly, Ormia ochracea, and mosquitoes, a novel low-noise, flow-sensing capacitive MEMS microphone capable of sensing acoustic particle velocity is introduced. Unlike conventional microphones that have a diaphragm for sensing sound pressure, this design consists of a thin ...
Johar Pourghader +6 more
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High SNR Capacitive Sensing Transducer
2006 IEEE International Symposium on Circuits and Systems, 2006This paper describes a high signal-to-noise ratio capacitive sensing transducer with high power efficiency and high area efficiency. The circuit is an example of capacitive circuit and is based on a capacitive feedback charge amplifier. 78.6dB SNR in audio band is achieved with less than 0.5 /spl mu/W power consumption by making use of a floating-gate ...
null Sheng-Yu Peng +4 more
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Three-phase capacitive position sensing
2010 IEEE Sensors, 2010We present a novel sensing scheme for capacitive position sensors based on physical and electrical modifications of traditional sensing arrangements. In addition to improved sensitivity, this “three-phase” sensing scheme enables a purely electrical method for post-process compensation of fabrication tolerances that can be implemented in the signal ...
Robert G Walmsley +4 more
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Capacitive Sensing of Glucose in Electrolytes Using Graphene Quantum Capacitance Varactors
ACS Applied Materials & Interfaces, 2017A novel graphene-based variable capacitor (varactor) that senses glucose based on the quantum capacitance effect was successfully developed. The sensor utilizes a metal-oxide-graphene varactor device structure that is inherently compatible with passive wireless sensing, a key advantage for in vivo glucose sensing.
Yao Zhang +5 more
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Variable Geometry Capacitive Probes for Multipurpose Sensing
Research in Nondestructive Evaluation, 1989A capacitive array for robotic proximity and feature sensing has been designed, modeled, and tested. The basic probe consists of alternating metallic strip electrodes. One set of strips makes up the drive plate. The other set consists of tiny receivers. Both sum and differential modes of operations are used to allow one to detect proximity and features,
Mark Gimple, B. A. Auld
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Tutorial: Capacitive Sense Interfaces
2020 IEEE International Solid-State Circuits Conference - (ISSCC), 2020openaire +1 more source