Low-cost, high-precision measurement system for capacitive sensors
C. Kolle, and P. O'Leary. Measurement Science and Technology, 9 (3):
510-517(1998)
Abstract
This paper describes a low-cost realization of a precision capacitance measurement instrument. The method is based on synchronous modulation and demodulation operating at a frequency of 100 kHz. A two-channel multiplying digital-to-analogue converter is used to generate a sinusoidal drive voltage and to perform multiplication with the demodulation signal. The modulation and demodulation signals are generated using a direct digital synthesizer, which is implemented using a field programmable gate array. Experimental results show a reproducibility of better than IMG in the range from 50 pF to 600 pF.
%0 Journal Article
%1 Kol:CapSens
%A Kolle, C
%A O'Leary, P
%D 1998
%J Measurement Science and Technology
%K imported
%N 3
%P 510-517
%T Low-cost, high-precision measurement system for capacitive sensors
%U http://stacks.iop.org/0957-0233/9/510
%V 9
%X This paper describes a low-cost realization of a precision capacitance measurement instrument. The method is based on synchronous modulation and demodulation operating at a frequency of 100 kHz. A two-channel multiplying digital-to-analogue converter is used to generate a sinusoidal drive voltage and to perform multiplication with the demodulation signal. The modulation and demodulation signals are generated using a direct digital synthesizer, which is implemented using a field programmable gate array. Experimental results show a reproducibility of better than IMG in the range from 50 pF to 600 pF.
@article{Kol:CapSens,
abstract = {This paper describes a low-cost realization of a precision capacitance measurement instrument. The method is based on synchronous modulation and demodulation operating at a frequency of 100 kHz. A two-channel multiplying digital-to-analogue converter is used to generate a sinusoidal drive voltage and to perform multiplication with the demodulation signal. The modulation and demodulation signals are generated using a direct digital synthesizer, which is implemented using a field programmable gate array. Experimental results show a reproducibility of better than IMG in the range from 50 pF to 600 pF. },
added-at = {2009-07-13T16:53:55.000+0200},
author = {Kolle, C and O'Leary, P},
biburl = {https://www.bibsonomy.org/bibtex/2530bed1820d2ae260d80102d1c50c238/enodev},
description = {rfmems},
interhash = {cf83a9dc9f39a08b7101dbdc2154e9d2},
intrahash = {530bed1820d2ae260d80102d1c50c238},
journal = {Measurement Science and Technology},
keywords = {imported},
number = 3,
pages = {510-517},
timestamp = {2009-07-14T08:40:47.000+0200},
title = {Low-cost, high-precision measurement system for capacitive sensors},
url = {http://stacks.iop.org/0957-0233/9/510},
volume = 9,
year = 1998
}