Circuit for continuous motional series resonant frequency and motional resistance monitoring of quartz crystal resonators by parallel capacitance compensation
Circuit for continuous motional series resonant frequency and motional resistance monitoring of quartz crystal resonators by parallel capacitance compensation
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DOI：
10.1063/1.1484254
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发表时间：
2002-07-01
影响因子：
1.6
通讯作者：
Jiménez, Y
中科院分区：
文献类型：
--
作者：
Arnau, A;Sogorb, T;Jiménez, Y
对作为石英晶体微天平传感器接口电路的振荡器相关问题的深入分析表明，传感器的所谓静态电容是使振荡器的使用对于传感器应用更加重要的因素之一。提出了一种专门设计用于补偿石英晶体谐振器传感器中并联电容效应的基于锁相环的电路。该电路允许校准传感器的外部电路并准确确定有效电容补偿。该系统提供运动串联谐振频率和运动电阻的连续测量。介绍了所提出的多传感器表征系统的扩展和自动化。电路的理论分析以及实验结果证明，所提出的系统是石英传感器表征的良好替代方案。 (C) 2002 年美国物理研究所。
A deep analysis of the problem associated with oscillators as interface circuits for quartz-crystal-microbalance sensors, reveals that the so-called static capacitance of the sensor is one of the elements that makes the use of oscillators more critical for sensors applications. A phase-locked-loop based circuit specifically designed for compensating the parallel capacitance effects in quartz crystal resonator sensors is presented. This circuit permits the calibration of the external circuitry to the sensor and an accurate determination of the effective capacitive compensation. The system provides a continuous measurement of the motional series resonant frequency and motional resistance. An extension and automation of the proposed system for multiple sensor characterization is introduced. The theoretical analysis of the circuit along with the experimental results presented prove that the proposed system is a good alternative for quartz sensors characterization. (C) 2002 American Institute of Physics.