DocumentCode
2908760
Title
Direct interface for capacitive sensors based on the charge transfer method
Author
Gaitán-Pitre, Jorge E. ; Gasulla, Manel ; Pallas-Areny, Ramon
Author_Institution
Univ. de Pamplona, Pamplona
fYear
2007
fDate
1-3 May 2007
Firstpage
1
Lastpage
5
Abstract
We present the theoretical analysis and experimental performance results of a direct interface for capacitive sensors based on the charge transfer method when parasitic capacitances are included. The interface circuit implements a two-point calibration technique that makes measurement results independent from voltage-and temperature-dependent parameters. The measurement deviation is below 1 % FSR (Full Scale Range) for capacitances from 10 pF to 1 nF.
Keywords
capacitive sensors; charge exchange; capacitive sensors; charge transfer method; direct sensor interface; interface circuit; parasitic capacitances; two-point calibration technique; Calibration; Capacitance measurement; Capacitive sensors; Charge measurement; Charge transfer; Chromium; Circuits; Current measurement; Parasitic capacitance; Voltage; Direct sensor interface; capacitance measurement; capacitive sensor; charge transfer method; microcontroller;
fLanguage
English
Publisher
ieee
Conference_Titel
Instrumentation and Measurement Technology Conference Proceedings, 2007. IMTC 2007. IEEE
Conference_Location
Warsaw
ISSN
1091-5281
Print_ISBN
1-4244-0588-2
Type
conf
DOI
10.1109/IMTC.2007.379227
Filename
4258096
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