Frequency stability improvement for piezoresistive micromechanical oscillators via synchronization
Frequency stability improvement for piezoresistive micromechanical oscillators via synchronization
复制标题
通过同步提高压阻微机械振荡器的频率稳定性
DOI：
10.1063/1.4978222
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发表时间：
2017-03-01
期刊：
影响因子：
1.6
通讯作者：
Wei, Xueyong
中科院分区：
文献类型：
--
作者：
Pu, Dong;Huan, Ronghua;Wei, Xueyong
惠更斯钟中首次发现的同步现象表明，振荡物体的节奏可以通过相互作用进行调整。在这里，我们表明，压阻式微机械振荡器的频率稳定性可以通过同步增强。利用静电驱动和压阻传感技术构建了微机械夹持梁振荡器，并将其耦合到外部振荡器后观察到同步现象。在同步状态下，频率稳定度得到了提高。实验研究了同步扰动强度和频率失谐量对振荡器的影响。相位噪声的理论分析导致的分析公式预测的压阻振荡器的频率输出的Allan偏差，成功地解释了实验观察和频率稳定性增强通过同步的机制。(C)2017年作者。
Synchronization phenomenon first discovered in Huygens' clock shows that the rhythms of oscillating objects can be adjusted via an interaction. Here we show that the frequency stability of a piezoresistive micromechanical oscillator can be enhanced via synchronization. The micromechanical clamped-clamped beam oscillator is built up using the electrostatic driving and piezoresistive sensing technique and the synchronization phenomenon is observed after coupling it to an external oscillator. An enhancement of frequency stability is obtained in the synchronization state. The influences of the synchronizing perturbation intensity and frequency detuning applied on the oscillator are studied experimentally. A theoretical analysis of phase noise leads to an analytical formula for predicting Allan deviation of the frequency output of the piezoresistive oscillator, which successfully explains the experimental observations and the mechanism of frequency stability enhancement via synchronization. (C) 2017 Author(s).