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首页> 外文期刊>Sensors Journal, IEEE >Reducing Measurement Error in Capacitive Readout Circuits Based on Weakly Coupled Resonators
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Reducing Measurement Error in Capacitive Readout Circuits Based on Weakly Coupled Resonators

机译：减少基于弱耦合谐振器的电容式读出电路中的测量误差

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摘要

A recently proposed method for measuring minute changes in capacitance based on weakly coupled resonators has been examined for its sensitivity with respect to unwanted resonant frequency changes. This sensitivity has been compared with the conventional capacitance measurement method based on the capacitance to frequency conversion. It has been analytically shown that both sensitivities are nearly equal but with opposite signs. This has led to a new hybrid capacitance measurement method to reduce the error by at least an order of magnitude. The analytical results have been validated by various simulations and experimental measurements.
机译：已经检查了最近提出的基于弱耦合谐振器的用于测量电容的微小变化的方法，该方法相对于不需要的谐振频率变化具有灵敏度。将该灵敏度与基于电容到频率转换的常规电容测量方法进行了比较。分析表明，两种灵敏度几乎相等，但符号相反。这导致了一种新的混合电容测量方法，可将误差至少降低一个数量级。分析结果已通过各种模拟和实验测量得到验证。

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