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A simple oscillator circuit for high resolution quartz crystal microbalance sensors is proposed for fluid media. It can solve the working problems of standard crystal controlled oscillators in damping media. The design is adapted to the conditions of strong damping that the quartz experiences, so that the oscillation stays in spite of the reduction of the resonator quality factor. The conditions for obtaining a stable frequency according to the resonator damping and the static capacity are studied. Experimental results confirming the success ot the circuit are reported.
References
-
-
1)
-
K.K. Kanazawa ,
J.G. Gordon
.
The oscillation frequency of a quartz resonator in contact with a liquid.
Anal. Chim. Acta
,
99 -
105
-
2)
-
D.W. Allan
.
Statistics of atomic frequency standards.
Proc. IEEE
,
2 ,
221 -
231
-
3)
-
Rodriguez-Pardo, L.: `Miller oscillators for high sensibility quartz crystal microbalance sensors in damping media', Proc. 2004 IEEE Int. Frequency Control Symp., 2004, p. 800–805.
-
4)
-
S.J. Martin ,
V.E. Grandstaff ,
G.C. Frye
.
Characterization of a quartz crystal microbalance with simultaneous mass and liquid loading.
Anal. Chem.
,
2272 -
2281
-
5)
-
L. Rodriguez-Pardo
.
Resolution in quartz crystal oscillator circuits for high sensitivity microbalance sensors in damping media.
Sens. Act. B
,
318 -
324
-
6)
-
`IEEE Standard Definitions of Physical Quantities for Fundamental Frequency and Time Metrology—Random Instabilities', IEEE STD. 1139–1999, July 1999.
-
7)
-
R. Brendel
.
Computer aided design of quartz crystal oscillators.
IEEE Trans. Ultrason. Ferroelectr. Freq. Control
,
4 ,
700 -
708
-
8)
-
R. Matthys
.
(1983)
Crystal oscillators circuits.
-
9)
-
H. Ehahoun
.
EQCM corrosion sensor for solid metals and metal alloys. Application to the dissolution of 304 stainless steel.
J. Electrochem. Soc.
,
B333 -
B336
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