Rodriguez-Pardo Loreto, Fariña Jose, Gabrielli Claude, Perrot Hubert, Brendel Remi
Departamento de Tecnología Electrónica and the Instituto de Electronica Aplicada Pedro Barrié de la Maza, Universidad de Vigo, 36200, Spain.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Oct;54(10):1965-76. doi: 10.1109/tuffc.2007.490.
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 (Cp) 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 Cp). 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.
本文介绍了对用于液体介质的高灵敏度微天平传感器的石英晶体振荡器设计的一项新贡献。研究了米勒配置在谐振器损耗的宽动态范围内工作的振荡条件。获得了将有源和无源元件的值与最大支持阻尼和质量相关联的方程。此外，还找到了根据谐振器阻尼（R(Q)）、静态电容（Cp）和滤波器频率（f(F)）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，并且不依赖于先前的参数（R(Q)、f(F)和Cp）。如果这些条件无法满足，则给出振荡频率的表达式，并通过谐振器频率测量来区分这些影响。
