Limitations of a relaxation oscillator in capacitance measurements

被引：26

作者：

Liu, YL ^{[1
]}

Chen, S ^{[1
]}

Nakayama, M ^{[1
]}

Watanabe, K ^{[1
]}

机构：

[1] Shizuoka Univ, Elect Res Inst, Hamamatsu, Shizuoka 4328011, Japan

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2000年 / 49卷 / 05期

关键词：

capacitance measurement; comparator; operational amplifier; relaxation oscillator; signal processing;

D O I：

10.1109/19.872917

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Oscillation periods of a relaxation oscillator consisting of an op-amp-based integrator and a comparator are measured over a wide range of RC integration constants, and the results are compared with theoretical values derived in terms of the finite gain-bandwidth (GB) product and the slew rate of an op-amp and the response delay of a comparator. The comparison validates the theoretical derivation which gives the design criteria of a relaxation oscillator for capacitance measurements and sensor signal processing.

引用

页码：980 / 983

页数：4

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