Design considerations of miller oscillators for high-sensitivity QCM sensors in damping media
Design considerations of miller oscillators for high-sensitivity QCM sensors in damping media
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DOI：
10.1109/tuffc.2007.490
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发表时间：
2007-10-01
影响因子：
3.6
通讯作者：
Brendel, Remi
中科院分区：
文献类型：
--
作者：
Rodriguez-Pardo, Loreto;Farina, Jose;Brendel, Remi
本文对用于液体介质中的高灵敏度微天平传感器的石英晶体振荡器的设计提出了新的贡献。研究了米勒结构在宽动态范围内谐振损耗的振荡条件。得到了主、被动元件的值与最大支承阻尼和最大支承质量之间的关系式。同时，根据谐振器阻尼（R-Q）、静态电容（C-p）和滤波器频率（f（F）），得到了获得稳定频率的条件，在这些条件下，电路振荡频率将与谐振串联频率成正比，而不依赖于先前的参数（R-Q、f（F）和C-p）。当这些条件不满足时，给出了振荡频率的表达式，并通过谐振器频率的测量来判别这些影响。
In this paper, a new contribution to the design of quartz crystal oscillators for high-sensitivity microbalance sensors used in liquid media is presented. The oscillation condition for a Miller configuration was studied to work in a wide dynamic range of the resonator losses. The equations relating the values of the active and passive components with the maximum supported damping and mass were obtained. Also, the conditions to obtain a stable frequency according to the resonator damping (R-Q), the static capacity (C-p) and the filter frequency (f(F)) were found. Under these conditions, the circuit oscillation frequency will be proportional to the resonant series frequency and does not depend on the previous parameters (R-Q, f(F), and C-p). If these conditions cannot be satisfied, the expression of the oscillation frequency is given and the discrimination of these effects is obtained through resonator frequency measurements.