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New Quartz Oscillator Switching Method for Nano-Henry Range Inductance Measurements

机译:纳米亨利距离电感测量的新型石英振荡器切换方法

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摘要

This article introduces a new method for nano-Henry inductance measurements at the frequency of 4.999 MHz with a single quartz crystal oscillating in the switching oscillating circuit. The real novelty of this method, however, lies in a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 0 °C and 50 °C through a switching method which compensates for the crystal’s natural temperature characteristics. This allows for the compensation of any influences on the crystal such as the compensation of the non-linear temperature characteristics and the ageing of both the crystal and other oscillating circuit elements, as well as the reduction of the output frequency measurement errors with the help of an additional reference frequency. The experimental results show that the switching method greatly improves the measurement of small inductance changes in the range between μH and nH, allowing as a result high-precision measurements (∼0.35 fH) in this range.
机译:本文介绍了一种在开关振荡电路中以单个石英晶体振荡的,在4.999 MHz频率下进行纳米亨利电感测量的新方法。但是,这种方法的真正新颖之处在于,通过补偿晶体自然温度特性的切换方法,可以大大降低AT切割晶体频率变化在0°C至50°C之间的温度范围内的温度影响。这样可以补偿对晶体的任何影响,例如非线性温度特性的补偿以及晶体和其他振荡电路元件的老化,以及借助以下方法减少输出频率测量误差。附加参考频率。实验结果表明,该切换方法极大地改善了在μH和nH之间范围内的微小电感变化的测量,从而可以在该范围内进行高精度测量(〜0.35 fH)。

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