DocumentCode
2534235
Title
High SNR capacitive sensing transducer
Author
Peng, Sheng-Yu ; Qureshi, Muhammad S. ; Hasler, Paul E. ; Hall, Neal A. ; Degertekin, F.L.
Author_Institution
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA
fYear
2006
fDate
21-24 May 2006
Lastpage
1178
Abstract
This 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 muW power consumption by making use of a floating-gate transistor. This design gives us the flexibility of controlling the charge on the floating node. The microphone sensor is interfaced with the amplifier to measure the performance of the transducer
Keywords
amplifiers; capacitive sensors; circuit feedback; low-power electronics; microphones; audio band; capacitive circuit; capacitive sensing transducer; charge amplifier; floating-gate transistor; microphone sensor; signal-to-noise ratio; Electrons; Feedback circuits; High power amplifiers; Power amplifiers; Resistors; Signal to noise ratio; Switched capacitor circuits; Transducers; Tunneling; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location
Island of Kos
Print_ISBN
0-7803-9389-9
Type
conf
DOI
10.1109/ISCAS.2006.1692800
Filename
1692800
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